Mount Jefferson, Oregon Weather
Viewpoint • Central Oregon
Mount Jefferson is Oregon's second-highest peak, a glaciated volcano of about 10,500 feet on the Cascade crest where Jefferson, Linn and Marion counties meet. Its western flanks lie in the Mount Jefferson Wilderness, while its east side is on the Confederated Tribes of Warm Springs reservation and closed to the public.
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10-Day Forecast
Hour by hour
Hourly Forecast
Current Conditions
Comfort Breakdown
Mount Jefferson weather today and through the year
It's 14°F at Mount Jefferson right now (feels like -1°F), with 21 mph wind and a comfort score of 14. Today's forecast high at Mount Jefferson is 25°F, 8°F below the mid November normal of 33°F. Fog is forecast to linger into the afternoon tomorrow at Mount Jefferson. In November, fog here often lingers all day. The best window tomorrow is 10 AM to 1 PM, at about 18°F with a 23 mph wind (comfort 15).
July is the warmest month at Mount Jefferson, with an average high of 61°F. February is the coldest, with an average low of 21°F. December is the wettest month (17.1 in.), out of about 106.6 in. a year. By typical temperature, wind, cloud, humidity, and precipitation odds, the most comfortable months at Mount Jefferson are July, August, and June. The best hours are usually 2 PM to 5 PM in July, 2 PM to 5 PM in August, and 8 AM to 11 AM in June.
Mount Jefferson rises more than a mile above the forests around it, right on the Cascade crest, so it meets Pacific storms head-on. It wrings out more precipitation than anywhere else in this part of the Cascades, almost all of it as snow. In winter its summit is in cloud about half the time. Camp Sherman, about 17 miles to the southeast, sits in the mountain's rain shadow, the drier ground downwind where storms have already lost much of their moisture. It gets only a small fraction of the mountain's precipitation.
Forecast updated November 13, 2026 at 5:02 PM PST. Climate figures come from NOAA 1991-2020 normals. Hourly patterns come from NOAA's HRRR hourly analysis from May 2016 to May 2026.
What to expect at Mount Jefferson in the next few days
No active National Weather Service alerts for this location.
Fog
Fog is forecast to linger into the afternoon tomorrow at Mount Jefferson. In November, fog here often lingers all day.
Best time to go
The best window tomorrow is 10 AM to 1 PM, at about 18°F with a 23 mph wind (comfort 15).
Hiking conditions
No daylight hour in the next week is forecast to be dry, 45 to 80°F, and under 18 mph wind at Mount Jefferson.
Best day this week
Of the next 7 days, Wednesday looks best for Mount Jefferson, with a 13°F high and midday comfort near 22. Thursday looks weakest (10).
This weekend
This weekend: Saturday 18°F/11°F with a 89% chance of rain, Sunday 20°F/10°F with a 99% chance of rain.
Rain
Next good chance of rain: today (93%, about 0.61 in.).
Snow
Snow is in the forecast: about 11.4 in. over the next week, starting today.
Freezing nights
7 of the next 7 nights are forecast to reach freezing or colder.
Live weather map
Weather around Mount Jefferson right now
Fog and 14° at Mount Jefferson right now.
About the live weather map for Mount Jefferson
The map centers on Mount Jefferson and stacks wildfire smoke, satellite clouds, and precipitation radar on one view. Clouds come from the GOES-West satellite and rain from NOAA radar, and both show current conditions.
Dots mark nearby places with their current temperature, colored by comfort score. Use the layer buttons to turn any layer off, or open the full map for every destination in the region.
Nearby Temperature Comparison
Conditions at nearby Central Oregon destinations
Tip: Central Oregon temperatures can change by 20 to 30°F over a short distance because of microclimates.
Mount Jefferson vs nearby places
Typical summer conditions compared with Mount Jefferson, from the same NOAA HRRR hourly record. The list shows the closest places, then nearby places whose climate differs the most.
| Place | Distance | Summer afternoons | Morning fog | Afternoon wind | Compared with Mount Jefferson |
|---|---|---|---|---|---|
| Pamelia Lake | 2.7 mi | +12°F | 10% | 6 mph | 6,586 ft lower and about 12°F warmer on summer afternoons |
| Marion Forks | 8.4 mi | +26°F | 1% | 5 mph | 8,043 ft lower and about 26°F warmer on summer afternoons |
| Three Fingered Jack | 13.7 mi | +9°F | 13% | 11 mph | about 9°F warmer on summer afternoons and 2,655 ft lower |
| Idanha | 13.9 mi | +27°F | 0% | 7 mph | 8,751 ft lower and about 27°F warmer on summer afternoons |
| Camp Sherman | 16.7 mi | +29°F | 0% | 7 mph | about 29°F warmer on summer afternoons and 7,539 ft lower |
| Lake Billy Chinook | 22.2 mi | +32°F | 1% | 9 mph | about 32°F warmer on summer afternoons and 8,544 ft lower |
Places with a climate like Mount Jefferson's
- Broken Top Summit (41 mi away): similar temperatures through the year
- No Name Lake / Broken Top (41 mi away): similar temperatures through the year
- Broken Top Trailhead (43 mi away): similar temperatures through the year
Climate Dashboard
Current conditions vs. NOAA normals and recent destination baseline
What the Mount Jefferson climate comparisons mean
These cards compare recent conditions at Mount Jefferson with the available local baseline. Temperature and year-to-date rainfall use long-term normals when available. Fog, sunshine, wind, and comfort use the matching recent or modeled baseline identified on each card.
Positive and negative differences describe how Mount Jefferson departs from its own usual pattern. They should not be read as a direct comparison with another city or as a forecast beyond the period shown.
Mount Jefferson weather by month
July is the warmest month at Mount Jefferson, with an average high of 61°F. February is the coldest, with an average low of 21°F. December is the wettest month (17.1 in.), out of about 106.6 in. a year. Morning fog peaks in February, when fog or low cloud covers 54% of the hours from 6 to 10 AM. July has the clearest middays, with clouds covering about 2% of the sky from 11 AM to 3 PM.
By typical temperature, wind, cloud, humidity, and precipitation odds, the most comfortable months at Mount Jefferson are July, August, and June. The best hours are usually 2 PM to 5 PM in July, 2 PM to 5 PM in August, and 8 AM to 11 AM in June.
| Month | Avg high | Avg low | Precip | Wet days | Morning fog | Midday cloud | Afternoon wind | Daylight | Comfort |
|---|---|---|---|---|---|---|---|---|---|
| Jan | 30°F | 21°F | 16.3 in | 24 | 49% | 16% | 16 mph | 9.2 h | 0 |
| Feb | 31°F | 21°F | 11.8 in | 20 | 54% | 14% | 16 mph | 10.4 h | 0 |
| Mar | 33°F | 21°F | 13.0 in | 21 | 51% | 13% | 15 mph | 11.8 h | 0 |
| Apr | 36°F | 24°F | 9.9 in | 19 | 43% | 12% | 14 mph | 13.5 h | 0 |
| May | 44°F | 30°F | 6.1 in | 15 | 33% | 10% | 12 mph | 14.8 h | 0 |
| Jun | 50°F | 35°F | 3.8 in | 12 | 24% | 7% | 12 mph | 15.6 h | 7 |
| Jul | 61°F | 42°F | 0.9 in | 6 | 6% | 2% | 11 mph | 15.2 h | 57 |
| Aug | 60°F | 42°F | 1.1 in | 6 | 7% | 2% | 10 mph | 14.0 h | 52 |
| Sep | 54°F | 38°F | 3.2 in | 11 | 20% | 6% | 11 mph | 12.4 h | 7 |
| Oct | 42°F | 31°F | 8.8 in | 18 | 33% | 11% | 14 mph | 10.8 h | 0 |
| Nov | 33°F | 25°F | 14.5 in | 23 | 48% | 14% | 17 mph | 9.5 h | 0 |
| Dec | 30°F | 21°F | 17.1 in | 25 | 52% | 13% | 17 mph | 8.8 h | 0 |
Morning fog is the share of hours from 6 to 10 AM with fog or low cloud. Midday cloud is the average from 11 AM to 3 PM, and afternoon wind is the average from 1 to 5 PM. The highlighted rows are the most comfortable months.
What makes Mount Jefferson's weather different
Among the 24 Central Oregon viewpoints we track, Mount Jefferson has the coolest summer afternoons.
- #1of 24
coolest summer afternoonsamong Central Oregon viewpoints
When the fog burns off
57%of 6 AM hours foggy in February
Fog or low cloud covers Mount Jefferson in 57% of 6 AM hours in February, the foggiest month. It often lingers, and 58% of mid-afternoon hours are still foggy. July mornings are the least foggy (6%).
Wind
14 mphtypical afternoon wind, with no strong daily build-up
Mount Jefferson has no strong afternoon wind build-up. Afternoons average about 14 mph year-round, and January is the windiest month, with hourly averages near 18 mph.
Freezing hours
24 hbelow freezing on a typical January night
In January, the average stays at or below freezing around the clock.
Elevation
+12°Fsummer afternoons at Pamelia Lake, 6,586 ft down
Pamelia Lake sits 6,586 ft lower, 2.7 miles away. Its summer highs average 12°F warmer and its winter lows 4°F milder than Mount Jefferson.
Daylight
8.8–15.6 hof daylight, Dec to Jun
Days at Mount Jefferson range from about 8.8 hours in December to 15.6 hours in June. In mid-June the sun sets around 8:55 PM, and in mid-December around 4:31 PM.
Wildfire smoke
13 daysof smoky air per fire season (about AQI 75+)
NOAA's HRRR-Smoke model gives the area around Mount Jefferson an average of 13 smoky days a fire season from 2021 to 2025. On each of those days, smoke held the air quality index at about 75 or higher for at least three hours. About 21 more days a season had lighter smoke.
Snow
111 dayswith snow per winter (HRRR estimate)
Mount Jefferson is high-alpine terrain where snow can fall in any month. NOAA's HRRR model counts about 111 snowy days a winter here, averaged over the 2023-24 to 2025-26 winters. Its snowfall totals this high up are too uncertain to give.
Seasons at Mount Jefferson
- Warm seasonJun 26 – Sep 25 · highs 52°F+
The warm season lasts about 3 months, from Jun 26 to Sep 25, when the average high is 52°F or warmer. Highs peak around Jul 8 at about 61°F.
- Cool seasonNov 29 – Feb 28 · highs 32°F or lower
The cool season runs from Nov 29 to Feb 28, when the average high is 32°F or lower. The coldest nights come around Feb 8, with an average low near 21°F.
- Freezing nightsOct 7 – May 29 · lows 32°F or colder
Average lows at Mount Jefferson are at or below freezing from Oct 7 to May 29.
- Wet seasonOct 12 – May 1 · 83% of the year's precipitation
The wet season runs from Oct 12 to May 1, when a day has at least a 54% chance of measurable precipitation. That stretch brings 83% of the year's precipitation.
The dark line marks today. Season dates come from the smoothed daily NOAA 1991-2020 normals. Counting from Oct. 1, a typical year has its first inch of precipitation by Oct 4 and half of its annual total by Jan 25.
Days per year and extremes (Nov 1, 2024 to Oct 31, 2026)
This record runs from Nov 1, 2024 to Oct 31, 2026. Over this record, Mount Jefferson averaged no days at 90°F or hotter and 239 nights a year at or below freezing. It averaged 66 days a year with at least half an inch of precipitation and 46 afternoons with wind of 20 mph or more at 2 PM. About 122 mornings a year had 3 or more hours of fog or low cloud.
In the same record, the hottest day was Aug 11, 2025 (70°F) and the coldest night was Feb 11, 2025 (-6°F). The wettest day was Nov 17, 2024 (5.13 in.), and the strongest 2 PM gust was 73 mph on Dec 18, 2025.
- 0days at 90°F or hotter
- 239nights at or below freezing
- 66days with ½ in. of precipitation or more
- 46afternoons with 20+ mph wind
- 122mornings with 3+ hours of fog or low cloud
- Hottest day70°FAug 11, 2025
- Coldest night-6°FFeb 11, 2025
- Wettest day5.13 inNov 17, 2024
- Strongest 2 PM gust73 mphDec 18, 2025
What shapes Mount Jefferson's weather
Its height makes the upper mountain of Mount Jefferson colder and windier than the country around it. Freezing nights last from early fall into late spring on the upper mountain, and strong wind is the norm rather than a late-afternoon event. In midwinter, cloud can sit on the peak for days. Even when the valleys below clear, a cap of cloud often hangs over the summit.
Summer is the short window for climbing and hiking. By July the lower snowfields soften, and the meadows of Jefferson Park on the north side and the lakes on the west side melt out. Clear skies are the rule. Afternoon thunderstorms still build over the crest, and fresh snow can fall on the upper mountain in any month.
Mount Jefferson's glaciers and loose volcanic slopes respond quickly to storms and summer heat. Heavy rain on snow or a burst of summer meltwater can send debris flows, fast-moving slurries of mud and rock, down the mountain's creeks. Fires, including the 2003 B&B Complex, have burned large parts of the wilderness around the peak. Smoke can hide the mountain entirely in late summer.
Tips for visiting Mount Jefferson
The summit is for experienced climbers
The final summit pinnacle is the hardest part of the climb, and the National Geodetic Survey recommends that only experienced climbers attempt it.
Stay on the public west side
The east side of the mountain is on the Warm Springs Reservation, where the tribal council does not allow public access. Approach from the Willamette or Deschutes national forest trailheads.
Get a wilderness permit for overnight trips
A Central Cascades Wilderness Permit is required for all overnight use from June 15 to October 15, and for day use at some trailheads. Reserve on Recreation.gov.
No campfires up high
Campfires are banned above 5,700 feet and in the Marion, Ann and Table lake basins, and groups are limited to 12 people and 12 head of stock.
Check fire closures first
Some roads and trailheads into the Mount Jefferson Wilderness have been closed after the Lionshead Fire. Check the Willamette National Forest alerts before you go.
Mount Jefferson through the seasons
- Spring (March–May)
- Spring is still deep winter on the mountain, with storms, avalanche-prone slopes and snow down to the trailheads.
- Summer (June–August)
- The climbing and backpacking season usually starts in July. Afternoon thunderstorms, smoke and snow on the upper mountain are all possible. Permits are required from June 15.
- Fall (September–November)
- September often brings clear, cold days and quieter trails, but the first big storms usually arrive in October. Permits end October 15.
- Winter (December–February)
- Winter brings frequent storms, very heavy snow, strong wind and long spells of cloud. The mountain is a winter mountaineering objective only.
Activities and the weather that matters
- Mountaineering: A climb needs a stable summer weather window and firm snow. The summit pinnacle is the hardest part, and fog and wind turn it dangerous fast.
- Backpacking Jefferson Park: The meadows on the north slope melt out in midsummer. Jefferson Park has 26 designated campsites, a 12-person group limit and no campfires.
- Hiking to the wilderness lakes: The wilderness has more than 150 lakes and about 40 miles of the Pacific Crest Trail. The lakes are best from July into early October.
Official sources and current conditions
- Willamette National Forest: Mt. Jefferson Wilderness
- Willamette National Forest: Central Cascades Wilderness Permits
- Willamette National Forest: alerts and closures
- NWS point forecast for Mount Jefferson
Numbers on this page come from NOAA data. The text draws on the official sources linked above.
Historical Climate Data
Long-term weather patterns and climate data
Data sources: Recent temperature, precipitation, fog, cloud, wind, humidity, and sunshine come from NOAA HRRR, and long-term baselines from NOAA 1991-2020 climate normals.
Climate Overview
Based on NOAA 30-year temperature/rain normals (1991-2020) with recent fog/sun baseline
🌟 Best Months to Visit
⚠️ Challenging Months
Monthly Breakdown
| Month | Comfort | High/Low | ☀️ Sun | 🌫️ Fog | 💧 Rain | Perfect |
|---|---|---|---|---|---|---|
| November 2024 | 30 | 27.4° / 17.3° | 2.4h | 20d | 21.36" | 0 |
| December 2024 | 31 | 29.6° / 18° | 2.8h | 17d | 25.56" | 0 |
| January 2025 | 47 | 29.9° / 16.7° | 5.5h | 7d | 10.91" | 0 |
| February 2025 | 35 | 22.6° / 10.6° | 3.6h | 13d | 15.29" | 0 |
| March 2025 | 33 | 25.7° / 15.9° | 4.3h | 18d | 21.94" | 1 |
| April 2025 | 55 | 32.7° / 19.2° | 9.4h | 8d | 4.43" | 0 |
| May 2025 | 57 | 39.6° / 27.8° | 9.3h | 11d | 2.84" | 5 |
| June 2025 | 77 | 50.1° / 36.4° | 11.9h | 2d | 1.87" | 17 |
| July 2025 | 86 | 57° / 43.2° | 12h | 1d | 0.06" | 26 |
| August 2025 | 82 | 56.7° / 44.4° | 10.9h | 4d | 0.73" | 22 |
| September 2025 | 76 | 53.7° / 41.4° | 8.8h | 2d | 1.51" | 20 |
| October 2025 | 46 | 36.5° / 26.7° | 5.9h | 11d | 10.83" | 2 |
| November 2025 | 39 | 33.3° / 24.8° | 4.4h | 11d | 9.73" | 0 |
| December 2025 | 30 | 30.3° / 20.9° | 2.2h | 21d | 25.3" | 0 |
| January 2026 | 45 | 32.6° / 21.8° | 5.1h | 9d | 9.48" | 0 |
| February 2026 | 40 | 27.1° / 16.9° | 4.6h | 12d | 13.16" | 0 |
| March 2026 | 39 | 31.3° / 20.5° | 5.3h | 16d | 12.95" | 0 |
| April 2026 | 50 | 32° / 20.4° | 8h | 9d | 9.17" | 0 |
| May 2026 | 61 | 42.3° / 30° | 10.1h | 5d | 4.4" | 6 |
| June 2026 | 67 | 46.9° / 33.9° | 9.9h | 7d | 3.19" | 15 |
| July 2026 | 87 | 57.3° / 43.1° | 12.2h | 0d | 0.19" | 26 |
| August 2026 | 87 | 57.1° / 43.6° | 11.6h | 1d | 0.06" | 25 |
| September 2026 | 60 | 44° / 33.9° | 7.9h | 6d | 3.13" | 8 |
| October 2026 | 62 | 42.3° / 30.3° | 7.1h | 6d | 3.8" | 11 |
Climate Trends
Average Temperature by Month
About the Mount Jefferson climate charts
The temperature chart compares average monthly highs and lows at Mount Jefferson, showing both the seasonal cycle and the typical day-to-night range. The comfort chart summarizes how often the combined weather pattern is favorable rather than judging temperature alone.
Precipitation shows the total recorded or modeled rainfall for each month at Mount Jefferson. Sunshine compares average bright-sky hours with the daylight available, while fog shows the average number of morning fog or low-cloud hours per day. Switch between the chart tabs to compare the same months across each measure.
Snow Depth by Season
9″ on the ground as of Nov 13, compared with an average of 17″ on that date.
Now
9″
Typical peak
126″
Deepest
259″
2023–24
About this chart and each season's peak
Each gray line is one winter at Mount Jefferson (10,194 ft), from August through July. The dashed line is the average for each date, and the blue line is this season. Depths come from NOAA's daily SNODAS snow analysis, adjusted for the elevation of this spot, and are updated through Nov 13, 2026.
| Season | Peak depth | Peak date | Days with 1″+ |
|---|---|---|---|
| 2025–26 | 147″ | Apr 16 | 289 |
| 2024–25 | 233″ | Mar 22 | 287 |
| 2023–24 | 259″ | May 7 | 301 |
| 2022–23 | 191″ | Apr 3 | 284 |
| 2021–22 | 218″ | May 8 | 301 |
| 2020–21 | 168″ | Feb 27 | 254 |
| 2019–20 | 208″ | May 23 | 321 |
| 2018–19 | 190″ | Apr 12 | 274 |
| 2017–18 | 73″ | Apr 13 | 279 |
| 2016–17 | 110″ | Mar 9 | 271 |
| 2015–16 | 113″ | Mar 16 | 253 |
| 2014–15 | 60″ | Dec 30 | 233 |
| 2013–14 | 115″ | Feb 16 | 304 |
| 2012–13 | 191″ | Apr 8 | 296 |
| 2011–12 | 190″ | Apr 2 | 297 |
| 2010–11 | 129″ | Apr 27 | 275 |
| 2009–10 | 115″ | Apr 30 | 280 |
| 2008–09 | 118″ | Apr 4 | 231 |
| 2007–08 | 126″ | Apr 9 | 271 |
| 2006–07 | 95″ | Mar 3 | 217 |
| 2005–06 | 105″ | Apr 16 | 245 |
| 2004–05 | 33″ | May 11 | 151 |
| 2003–04 | 34″ | Jan 7 | 141 |
Hourly Temperature, Wind, and Cloud Cover Patterns
Average local hour by month from 2016-05-01 to 2026-05-01
- Temperature: At Mount Jefferson, the warmest typical hour is 4 PM in July (55°F). The coldest is 7 AM in February (15°F).
- Wind: Mount Jefferson has no strong afternoon wind build-up. Afternoons average about 14 mph year-round, and January is the windiest month, with hourly averages near 18 mph.
- Cloud Cover: July middays are the clearest at Mount Jefferson (2% average cloud cover), and January middays are the cloudiest (16%).
How to read the hourly heatmaps for Mount Jefferson
This heatmap shows how average temperature at Mount Jefferson changes by hour and month. Read left to right for the seasons and top to bottom for the time of day. Warmer colors mark the usual afternoon peaks, and cooler colors show overnight and winter lows.
This heatmap shows the typical hourly wind pattern at Mount Jefferson through the year. It makes recurring afternoon wind, calmer overnight periods, and seasonal changes easier to compare than a single daily wind value.
This heatmap shows average cloud cover at Mount Jefferson for every month and hour. Use it to see whether cloudiness is mainly an overnight and morning pattern or commonly persists during the part of the day you plan to visit.
Each cell combines one month with one local hour. Hover over or focus on a cell for its value and sample coverage. The red marker shows the current month and hour.
How recent months compared at Mount Jefferson
- October 2026 recap: October 2026 at Mount Jefferson averaged a high of 42°F, 6°F warmer than October 2025 (37°F).
Location Details
Mount Jefferson weather questions
Everything you need to know about weather and visiting Mount Jefferson
What is the weather like at Mount Jefferson today?
It's 14°F at Mount Jefferson right now, with a comfort score of 14 (severe). Today's forecast high at Mount Jefferson is 25°F, 8°F below the mid November normal of 33°F. The best window tomorrow is 10 AM to 1 PM, at about 18°F with a 23 mph wind (comfort 15).
What is the best month to visit Mount Jefferson?
By typical temperature, wind, cloud, humidity, and precipitation odds, the most comfortable months at Mount Jefferson are July, August, and June. The best hours are usually 2 PM to 5 PM in July, 2 PM to 5 PM in August, and 8 AM to 11 AM in June. The warm season lasts about 3 months, from Jun 26 to Sep 25, when the average high is 52°F or warmer. Highs peak around Jul 8 at about 61°F.
What are the warmest and coldest months at Mount Jefferson?
July is the warmest month at Mount Jefferson, with an average high of 61°F. February is the coldest, with an average low of 21°F. Average lows at Mount Jefferson are at or below freezing from Oct 7 to May 29.
When does the fog burn off at Mount Jefferson?
Fog or low cloud covers Mount Jefferson in 57% of 6 AM hours in February, the foggiest month. It often lingers, and 58% of mid-afternoon hours are still foggy. July mornings are the least foggy (6%).
Does it snow at Mount Jefferson?
Yes, a lot. Mount Jefferson is high-alpine terrain where snow can fall in any month. NOAA's HRRR model counts about 111 snowy days a winter here, averaged over the 2023-24 to 2025-26 winters. Its snowfall totals this high up are too uncertain to give.
How much rain and snow does Mount Jefferson get?
December is the wettest month (17.1 in.), out of about 106.6 in. a year. The wet season runs from Oct 12 to May 1, when a day has at least a 54% chance of measurable precipitation. That stretch brings 83% of the year's precipitation.
How does Mount Jefferson weather compare with Pamelia Lake?
Pamelia Lake sits 6,586 ft lower, 2.7 miles away. Its summer highs average 12°F warmer and its winter lows 4°F milder than Mount Jefferson.
How smoky does Mount Jefferson get in fire season?
NOAA's HRRR-Smoke model gives the area around Mount Jefferson an average of 13 smoky days a fire season from 2021 to 2025. On each of those days, smoke held the air quality index at about 75 or higher for at least three hours. About 21 more days a season had lighter smoke.
How tall is Mount Jefferson?
Published measurements differ slightly, from about 10,497 to 10,502 feet. Either way it is Oregon's second-highest mountain, after Mount Hood.
Does Mount Jefferson have glaciers?
Yes. It has four named glaciers, called Whitewater, Jefferson Park, Russell and Waldo.
Has wildfire affected the Mount Jefferson Wilderness?
Yes. The 2003 B&B Complex fires, started by lightning, burned about 40,400 acres inside the Mount Jefferson Wilderness, along with forest around Santiam Pass and Suttle Lake.
What kind of place is Mount Jefferson?
Mount Jefferson is Oregon's second-highest peak, a glaciated volcano of about 10,500 feet on the Cascade crest where Jefferson, Linn and Marion counties meet. Its western flanks lie in the Mount Jefferson Wilderness, while its east side is on the Confederated Tribes of Warm Springs reservation and closed to the public.
What is Mount Jefferson weather like in November?
November at Mount Jefferson averages a high of 33°F and a low of 25°F, with 14.5 in. of precipitation over about 23 wet days. About 48% of morning hours are foggy. Afternoon wind averages 17 mph.
More about Mount Jefferson weather
Data sources and methods
- Monthly temperatures and precipitation: NOAA 1991-2020 normals.
- Fog, cloud, wind, sun, and comfort by hour and month: NOAA's HRRR hourly analysis from May 2016 to May 2026.
- Daily records and recent months: NOAA HRRR analyses, including its hourly precipitation.
- Nearby comparisons and regional rankings use the same hourly HRRR summaries for every destination in the region.
- Alerts: National Weather Service.
- All statements on this page are computed from these datasets, apart from the “What shapes the weather” guide, which cites its sources inline.
- Wikipedia, Mount Jefferson (Oregon) (accessed 2026-10-29)
- Willamette National Forest, Mt. Jefferson Wilderness (accessed 2026-10-29)
- Willamette National Forest, Wilderness (accessed 2026-10-29)
- Willamette National Forest, Central Cascades Wilderness Permits (accessed 2026-10-29)
- Wikipedia, B&B Complex fires (2003) (accessed 2026-10-29)
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