Glen Ellen Weather
Town • San Francisco Bay Area
Glen Ellen is a village of a few hundred residents along Calabazas Creek in the middle of the Sonoma Valley, at the eastern foot of Sonoma Mountain. Jack London lived here from 1905 until his death in 1916, and his ranch on the slope above the village is now Jack London State Historic Park. Sonoma Valley Regional Park borders the village along Highway 12, and Sonoma Mountain's vineyards begin climbing right behind town.
Plan your week
10-Day Forecast
Hour by hour
Hourly Forecast
Current Conditions
Comfort Breakdown
Glen Ellen weather today and through the year
It's 55°F at Glen Ellen right now (feels like 53°F), with 7 mph wind and a comfort score of 80. Today's forecast high at Glen Ellen is 58°F, 7°F below the mid November normal of 65°F. No fog in the forecast for today at Glen Ellen. In November, 26% of morning hours here are foggy on average. The best window today is 8 AM to 11 AM, at about 52°F with a 5 mph wind (comfort 57).
August is the warmest month at Glen Ellen, with an average high of 85°F. December is the coldest, with an average low of 38°F. December is the wettest month (6.4 in.), out of about 31.1 in. a year. By typical temperature, wind, cloud, humidity, and rain odds, the most comfortable months at Glen Ellen are September, October, and May. The best hours are usually 10 AM to 1 PM in September, 11 AM to 2 PM in October, and 11 AM to 2 PM in May.
Glen Ellen sits on the sheltered east side of Sonoma Mountain, which turns aside the foggy coastal breezes moving north through the Petaluma Gap. While Petaluma, on the mountain's other side, is often under morning fog in summer, the east-facing slopes above Glen Ellen catch earlier morning sun and warm quickly.
Forecast updated November 15, 2026 at 4:00 AM PST. Climate figures come from NOAA 1991-2020 normals. Hourly patterns come from NOAA's HRRR hourly analysis from September 2014 to April 2026.
What to expect at Glen Ellen in the next few days
No active National Weather Service alerts for this location.
Fog
No fog in the forecast for today at Glen Ellen. In November, 26% of morning hours here are foggy on average.
Best time to go
The best window today is 8 AM to 11 AM, at about 52°F with a 5 mph wind (comfort 57).
Best day this week
Of the next 7 days, Friday looks best for Glen Ellen, with a 59°F high and midday comfort near 73. Today looks weakest (48).
Rain
Next good chance of rain: today (78%, about 0.44 in.).
Live weather map
Weather around Glen Ellen right now
Overcast and 55° at Glen Ellen right now.
About the live weather map for Glen Ellen
The map centers on Glen Ellen and stacks fog, 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. Fog comes from our HRRR-based fog model, and the slider steps through its forecast for the next 12 hours.
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 San Francisco Bay Area destinations
Tip: Bay Area temperatures can change by 20 to 30°F over a short distance because of microclimates.
Glen Ellen vs nearby places
Typical summer conditions compared with Glen Ellen, 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 Glen Ellen |
|---|---|---|---|---|---|
| Sonoma Valley Regional Park | 0.3 mi | same | 25% | 7 mph | a very similar climate |
| Jack London State Historic Park | 1.1 mi | -2°F | 31% | 7 mph | a very similar climate |
| Kenwood | 3.5 mi | -2°F | 29% | 9 mph | a very similar climate |
| Wooden Valley | 19.4 mi | -1°F | 3% | 10 mph | less summer morning fog (3% vs 25% of morning hours) |
| Occidental | 23.3 mi | -11°F | 36% | 9 mph | about 11°F cooler on summer afternoons and about 50% more rain a year |
| Lake Berryessa | 23.3 mi | +4°F | 1% | 8 mph | less summer morning fog (1% vs 25% of morning hours) and about 4°F warmer on summer afternoons |
Places with a climate like Glen Ellen's
- Healdsburg (25 mi away): nearly the same temperatures every month
- Geyserville (31 mi away): nearly the same temperatures every month
- Windsor (20 mi away): similar temperatures through the year
Climate Dashboard
Current conditions vs. NOAA normals and recent destination baseline
What the Glen Ellen climate comparisons mean
These cards compare recent conditions at Glen Ellen 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 Glen Ellen 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.
Glen Ellen weather by month
August is the warmest month at Glen Ellen, with an average high of 85°F. December is the coldest, with an average low of 38°F. December is the wettest month (6.4 in.), out of about 31.1 in. a year. Morning fog peaks in December, when fog or low cloud covers 34% of the hours from 6 to 10 AM. July has the clearest middays, with clouds covering about 6% of the sky from 11 AM to 3 PM.
By typical temperature, wind, cloud, humidity, and rain odds, the most comfortable months at Glen Ellen are September, October, and May. The best hours are usually 10 AM to 1 PM in September, 11 AM to 2 PM in October, and 11 AM to 2 PM in May.
| Month | Avg high | Avg low | Rain | Rainy days | Morning fog | Midday cloud | Afternoon wind | Daylight | Comfort |
|---|---|---|---|---|---|---|---|---|---|
| Jan | 57°F | 38°F | 6.1 in | 10 | 32% | 35% | 7 mph | 9.8 h | 39 |
| Feb | 61°F | 40°F | 6.0 in | 10 | 18% | 27% | 7 mph | 10.7 h | 48 |
| Mar | 65°F | 42°F | 4.3 in | 9 | 20% | 31% | 8 mph | 11.9 h | 64 |
| Apr | 69°F | 44°F | 1.9 in | 6 | 16% | 25% | 8 mph | 13.2 h | 77 |
| May | 74°F | 48°F | 1.1 in | 4 | 17% | 21% | 8 mph | 14.3 h | 82 |
| Jun | 81°F | 51°F | 0.3 in | 2 | 18% | 8% | 8 mph | 14.8 h | 81 |
| Jul | 84°F | 53°F | 0.0 in | 0 | 30% | 6% | 7 mph | 14.6 h | 81 |
| Aug | 85°F | 54°F | 0.0 in | 1 | 28% | 7% | 7 mph | 13.6 h | 82 |
| Sep | 84°F | 52°F | 0.1 in | 2 | 24% | 11% | 7 mph | 12.3 h | 85 |
| Oct | 77°F | 48°F | 1.6 in | 5 | 22% | 16% | 7 mph | 11.1 h | 83 |
| Nov | 65°F | 42°F | 3.3 in | 8 | 26% | 22% | 6 mph | 10.0 h | 70 |
| Dec | 57°F | 38°F | 6.4 in | 11 | 34% | 38% | 6 mph | 9.5 h | 36 |
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 Glen Ellen's weather different
When the fog burns off
2 PMwhen December fog usually thins (37% foggy at 8 AM)
Fog or low cloud covers Glen Ellen in 37% of 8 AM hours in December, the foggiest month. It usually thins to a third of that by 2 PM. April mornings are the least foggy (16%).
When the wind picks up
4 PMwhen afternoon wind builds, June–September
From June through September, wind at Glen Ellen typically builds after 4 PM. In July it peaks around 8 PM, averaging 10 mph with 6% of those hours windy, while mornings average 6 mph.
Hot hours
4 habove 85°F on a typical July afternoon
In July, the average temperature stays at or above 85°F for 4 hours a day.
Daylight
9.5–14.8 hof daylight, Dec to Jun
Days at Glen Ellen range from about 9.5 hours in December to 14.8 hours in June. In mid-June the sun sets around 8:34 PM, and in mid-December around 4:55 PM.
Seasons at Glen Ellen
- Warm seasonJun 28 – Sep 26 · highs 82°F+
The warm season lasts about 3 months, from Jun 28 to Sep 26, when the average high is 82°F or warmer. Highs peak around Aug 8 at about 85°F.
- Cool seasonNov 29 – Feb 25 · highs 62°F or lower
The cool season runs from Nov 29 to Feb 25, when the average high is 62°F or lower. The coldest nights come around Dec 8, with an average low near 38°F.
- Rainy seasonOct 28 – Apr 12 · 87% of the year's rain
The rainy season runs from Oct 28 to Apr 12, when a day has at least a 20% chance of measurable rain. That stretch brings 87% of the year's rain.
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 rain by Oct 20 and half of its annual total by Jan 22.
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, Glen Ellen averaged 43 days a year at 90°F or hotter and 1 night a year at or below freezing. It averaged 19 days a year with at least half an inch of rain and 0 afternoons with wind of 20 mph or more at 2 PM. About 113 mornings a year had 3 or more hours of fog or low cloud.
In the same record, the hottest day was Jul 14, 2026 (102°F) and the coldest night was Feb 20, 2026 (32°F). The wettest day was Nov 21, 2024 (4.55 in.), and the strongest 2 PM gust was 40 mph on Mar 12, 2025.
- 43days at 90°F or hotter
- 1night at or below freezing
- 19days with ½ in. of rain or more
- 0afternoons with 20+ mph wind
- 113mornings with 3+ hours of fog or low cloud
- Hottest day102°FJul 14, 2026
- Coldest night32°FFeb 20, 2026
- Wettest day4.55 inNov 21, 2024
- Strongest 2 PM gust40 mphMar 12, 2025
What shapes Glen Ellen's weather
Glen Ellen's village center sits low, where creeks come off Sonoma Mountain into a narrow part of the valley floor. On clear nights cold air drains down those canyons and collects along the creeks. Dawn in the village can be distinctly colder than on the ranch land a few hundred feet up the slope at Jack London park.
Fire is the hazard locals plan around. In October 2017 the Nuns Fire burned through the hills around the village, including Sonoma Valley Regional Park next door, where much of the oak canopy survived. The highest risk comes on fall days with dry offshore wind, which blows from the hot interior over the Mayacamas toward the coast.
Tips for visiting Glen Ellen
Walk up to Jack London's ranch
Jack London State Historic Park, on London Ranch Road above the village, is open 9 a.m. to 5 p.m. daily except Dec. 25.
Take the paved valley trail
Sonoma Valley Regional Park's Valley of the Moon Trail is paved and ADA-accessible for about 1.2 miles, a dry option after rain.
Dress for a cold morning
Even in summer, the creekside village can start out chilly before the sun clears the Mayacamas. Bring a layer you can shed by midmorning.
Sign up for SoCoAlert
Sonoma County sends wildfire and evacuation alerts through SoCoAlert and Nixle, which matters on fall wind days.
Glen Ellen through the seasons
- Spring (March–May)
- Poppies, lupine, and other wildflowers bloom in the regional park's oak woodland at the edge of the village.
- Summer (June–August)
- Sunny mornings arrive early on Sonoma Mountain's east-facing slopes, and afternoons are hot. Shade along the creeks helps.
- Fall (September–October)
- Fall is harvest season and the peak of fire weather, so watch for Red Flag Warnings, the weather service's alerts for hot, dry, windy days.
- Winter (November–February)
- The creeks run again and the seasonal creek along the Valley of the Moon Trail fills. Frost can form on the coldest clear mornings in the low parts of the village.
Activities and the weather that matters
- Hiking at Jack London State Historic Park: Cool mornings are best any time of year. The upper trail is mostly shaded, which helps on summer days.
- Walking or biking the Valley of the Moon Trail: The trail is paved and flat enough for wet weather. Summer middays are hot on the open stretches.
- Village tasting rooms and restaurants: They are good year-round. Summer evenings on a creekside patio cool down fast after sunset.
Official sources and current conditions
- California State Parks: Jack London State Historic Park
- Sonoma County Regional Parks: Sonoma Valley Regional Park
- Sonoma County evacuation zone map
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 temperatures come from NOAA URMA and recent precipitation from NOAA Stage IV. 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 | 77 | 62° / 44.7° | 6.2h | 4d | 12.84" | 17 |
| December 2024 | 67 | 58.1° / 44.3° | 4.8h | 14d | 8.19" | 12 |
| January 2025 | 82 | 60.3° / 41.6° | 7.1h | 7d | 0.35" | 19 |
| February 2025 | 75 | 61.3° / 42.5° | 6.1h | 7d | 11.44" | 14 |
| March 2025 | 80 | 61.7° / 43.5° | 7.6h | 5d | 3.3" | 19 |
| April 2025 | 89 | 68.4° / 45.7° | 9.6h | 8d | 0.56" | 24 |
| May 2025 | 94 | 78.7° / 50.4° | 12.3h | 2d | 0.13" | 30 |
| June 2025 | 94 | 82.6° / 51.1° | 12.5h | 2d | 0" | 30 |
| July 2025 | 91 | 83° / 53° | 11.9h | 8d | 0" | 31 |
| August 2025 | 89 | 89.8° / 56° | 11.5h | 1d | 0" | 27 |
| September 2025 | 89 | 83.3° / 57.4° | 9.7h | 2d | 0.16" | 26 |
| October 2025 | 85 | 73.4° / 52.1° | 7.3h | 8d | 1.28" | 24 |
| November 2025 | 78 | 63.8° / 48.1° | 6.3h | 12d | 4.32" | 16 |
| December 2025 | 63 | 54.7° / 43.1° | 4.3h | 16d | 6.31" | 6 |
| January 2026 | 77 | 60.4° / 43.9° | 6.5h | 7d | 4.77" | 21 |
| February 2026 | 79 | 63.4° / 45.4° | 6.4h | 5d | 4.7" | 17 |
| March 2026 | 95 | 78.1° / 51.7° | 9.8h | 0d | 0.03" | 30 |
| April 2026 | 87 | 68.3° / 46.7° | 9h | 5d | 4.2" | 23 |
| May 2026 | 92 | 76.1° / 51.1° | 11.7h | 5d | 0.96" | 30 |
| June 2026 | 92 | 83.2° / 54.3° | 12.3h | 5d | 0" | 29 |
| July 2026 | 88 | 88.4° / 55.4° | 11.7h | 3d | 0" | 27 |
| August 2026 | 88 | 88° / 54.2° | 10.8h | 10d | 0" | 27 |
| September 2026 | 89 | 83.1° / 54.3° | 9.6h | 6d | 0.38" | 27 |
| October 2026 | 87 | 80.3° / 53° | 8.4h | 4d | 0.23" | 25 |
Climate Trends
Average Temperature by Month
About the Glen Ellen climate charts
The temperature chart compares average monthly highs and lows at Glen Ellen, 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 Glen Ellen. 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.
Hourly Temperature, Fog, Wind, Cloud Cover, and Solar Radiation Patterns
Average local hour by month from 2014-09-30 to 2026-04-30
- Temperature: At Glen Ellen, the warmest typical hour is 4 PM in July (88°F). The coldest is 7 AM in December (45°F).
- Fog: Fog or low cloud covers Glen Ellen in 37% of 8 AM hours in December, the foggiest month. It usually thins to a third of that by 2 PM. April mornings are the least foggy (16%).
- Wind: From June through September, wind at Glen Ellen typically builds after 4 PM. In July it peaks around 8 PM, averaging 10 mph with 6% of those hours windy, while mornings average 6 mph.
- Cloud Cover: July middays are the clearest at Glen Ellen (6% average cloud cover), and December middays are the cloudiest (38%).
- Solar Radiation: The strongest typical sun at Glen Ellen comes at 1 PM in July, averaging 988 W/m².
How to read the hourly heatmaps for Glen Ellen
This heatmap shows how average temperature at Glen Ellen 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 when fog or low cloud is most likely at Glen Ellen. Darker cells mark the months and hours when fog has been most common. They help separate overnight or morning fog from cloud that tends to linger into the afternoon.
This heatmap shows the typical hourly wind pattern at Glen Ellen 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 Glen Ellen 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.
This heatmap shows the average solar radiation reaching Glen Ellen by month and hour. Brighter cells indicate the strongest typical sun, while muted cells can reflect nighttime, shorter winter days, cloud cover, smoke, or terrain shading.
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 Glen Ellen
- October 2026 recap: October 2026 at Glen Ellen averaged a high of 80°F, 7°F warmer than October 2025 (73°F).
- Rain year: The 2025-26 rain year (Oct. 1 to Sep. 30) brought 27.0 in. of rain to Glen Ellen, 87% of the 31.1 in. normal.
Location Details
Glen Ellen weather questions
Everything you need to know about weather and visiting Glen Ellen
What is the weather like at Glen Ellen today?
It's 55°F at Glen Ellen right now, with a comfort score of 80 (great). Today's forecast high at Glen Ellen is 58°F, 7°F below the mid November normal of 65°F. The best window today is 8 AM to 11 AM, at about 52°F with a 5 mph wind (comfort 57).
What is the best month to visit Glen Ellen?
By typical temperature, wind, cloud, humidity, and rain odds, the most comfortable months at Glen Ellen are September, October, and May. The best hours are usually 10 AM to 1 PM in September, 11 AM to 2 PM in October, and 11 AM to 2 PM in May. The warm season lasts about 3 months, from Jun 28 to Sep 26, when the average high is 82°F or warmer. Highs peak around Aug 8 at about 85°F.
What are the warmest and coldest months at Glen Ellen?
August is the warmest month at Glen Ellen, with an average high of 85°F. December is the coldest, with an average low of 38°F.
When does the fog burn off at Glen Ellen?
Fog or low cloud covers Glen Ellen in 37% of 8 AM hours in December, the foggiest month. It usually thins to a third of that by 2 PM. April mornings are the least foggy (16%).
When is it windiest at Glen Ellen?
From June through September, wind at Glen Ellen typically builds after 4 PM. In July it peaks around 8 PM, averaging 10 mph with 6% of those hours windy, while mornings average 6 mph.
How much rain does Glen Ellen get?
December is the wettest month (6.4 in.), out of about 31.1 in. a year. The rainy season runs from Oct 28 to Apr 12, when a day has at least a 20% chance of measurable rain. That stretch brings 87% of the year's rain. The 2025-26 rain year (Oct. 1 to Sep. 30) brought 27.0 in. of rain to Glen Ellen, 87% of the 31.1 in. normal.
Why is Glen Ellen sunnier than Petaluma on summer mornings?
Sonoma Mountain stands between them. Federal findings for the Sonoma Mountain wine region describe the broad, tall mountain diverting the foggy coastal breezes of the Petaluma Gap. That leaves its eastern side, where Glen Ellen sits, more protected and warmer.
What kind of place is Glen Ellen?
Glen Ellen is a village of a few hundred residents along Calabazas Creek in the middle of the Sonoma Valley, at the eastern foot of Sonoma Mountain. Jack London lived here from 1905 until his death in 1916, and his ranch on the slope above the village is now Jack London State Historic Park. Sonoma Valley Regional Park borders the village along Highway 12, and Sonoma Mountain's vineyards begin climbing right behind town.
What is Glen Ellen weather like in November?
November at Glen Ellen averages a high of 65°F and a low of 42°F, with 3.3 in. of rain over about 8 rainy days. About 26% of morning hours are foggy. Afternoon wind averages 6 mph.
More about Glen Ellen weather
Guides that explain the weather here and nearby
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 September 2014 to April 2026.
- Daily records and recent months: NOAA URMA and HRRR analyses, plus NOAA Stage IV precipitation.
- Nearby comparisons and regional rankings use the same hourly HRRR summaries for every destination in the region.
- Alerts: National Weather Service. Tides and ocean temperature: NOAA CO-OPS, where shown.
- All statements on this page are computed from these datasets, apart from the “What shapes the weather” guide, which cites its sources inline.
- California State Parks, Jack London State Historic Park (accessed 2026-10-27)
- Sonoma County Regional Parks, Sonoma Valley Regional Park (accessed 2026-10-27)
- Sonoma County Emergency Management, SoCoEmergency (accessed 2026-10-27)
- Sonoma County Winegrowers, About Sonoma County Terroir (PDF) (accessed 2026-10-27)
- Jack London Park Partners, Sonoma Mountain hiking trail (accessed 2026-10-27)
- ATF proposed rule, Bennett Valley viticultural area, Federal Register, Nov. 22, 2002 (accessed 2026-10-27)
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