Danville Weather
Town • San Francisco Bay Area
Danville lies in the middle of the San Ramon Valley along I-680. The Las Trampas high country rises to the west, and Mount Diablo's southern flank rises to the east. Its historic downtown along Railroad Avenue holds the Museum of the San Ramon Valley. That is the boarding point for the National Park Service shuttle to Tao House, where Eugene O'Neill wrote his last plays. The paved Iron Horse Regional Trail follows the old Southern Pacific line through town, and Mount Diablo's South Gate road climbs from the Blackhawk side.
Plan your week
10-Day Forecast
Hour by hour
Hourly Forecast
Current Conditions
Comfort Breakdown
Danville weather today and through the year
It's 52°F at Danville right now (feels like 49°F), with 5 mph wind and a comfort score of 76. Monday's forecast high at Danville is 56°F, 8°F below the mid November normal of 64°F. The best window today is 8 AM to 11 AM, at about 55°F with a 7 mph wind (comfort 58).
July is the warmest month at Danville, with an average high of 86°F. December is the coldest, with an average low of 39°F. January is the wettest month (4.3 in.), out of about 21.4 in. a year. By typical temperature, wind, cloud, humidity, and rain odds, the most comfortable months at Danville are June, September, and July. The best hours are usually 9 AM to noon in June, 9 AM to noon in September, and 8 AM to 11 AM in July.
Danville is deep inside the shelter of the Coast Range. Rocky Ridge and Las Trampas Ridge stand between the town and the bay. The Bay Area Air District ties the valley's warm summers and cool winters to its distance from the moderating effect of open water. Summer afternoons run hot, and the sea breeze that cools Hayward and San Leandro rarely reaches here with any strength.
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 Danville in the next few days
No active National Weather Service alerts for this location.
Best time to go
The best window today is 8 AM to 11 AM, at about 55°F with a 7 mph wind (comfort 58).
Best day this week
Of the next 7 days, Friday looks best for Danville, with a 59°F high and midday comfort near 77. Thursday looks weakest (49).
Rain
Next good chance of rain: today (80%, about 0.21 in.).
Live weather map
Weather around Danville right now
Overcast and 52° at Danville right now.
About the live weather map for Danville
The map centers on Danville 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.
Danville vs nearby places
Typical summer conditions compared with Danville, 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 Danville |
|---|---|---|---|---|---|
| Las Trampas Regional Wilderness | 1.7 mi | -6°F | 19% | 11 mph | more summer morning fog (19% vs 3% of morning hours) and about 6°F cooler on summer afternoons |
| San Ramon | 3.1 mi | -4°F | 25% | 11 mph | more summer morning fog (25% vs 3% of morning hours) and about 4°F cooler on summer afternoons |
| Mount Diablo State Park | 6.2 mi | -8°F | 4% | 10 mph | 3,488 ft higher and about 8°F cooler on summer afternoons |
| Downtown San Francisco | 21.8 mi | -22°F | 27% | 10 mph | about 22°F cooler on summer afternoons and more summer morning fog (27% vs 3% of morning hours) |
| Alcatraz Island | 23.1 mi | -26°F | 34% | 19 mph | about 26°F cooler on summer afternoons and windier summer afternoons (19 vs 8 mph) |
| Marina District | 24 mi | -26°F | 34% | 19 mph | about 26°F cooler on summer afternoons and windier summer afternoons (19 vs 8 mph) |
Places with a climate like Danville's
- Pleasanton (13 mi away): nearly the same temperatures every month
- Livermore (16 mi away): nearly the same temperatures every month
- Black Diamond Mines Regional Preserve (12 mi away): similar temperatures through the year
Climate Dashboard
Current conditions vs. NOAA normals and recent destination baseline
What the Danville climate comparisons mean
These cards compare recent conditions at Danville 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 Danville 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.
Danville weather by month
July is the warmest month at Danville, with an average high of 86°F. December is the coldest, with an average low of 39°F. January is the wettest month (4.3 in.), out of about 21.4 in. a year. Morning fog peaks in December, when fog or low cloud covers 23% of the hours from 6 to 10 AM. July has the clearest middays, with clouds covering about 5% of the sky from 11 AM to 3 PM.
By typical temperature, wind, cloud, humidity, and rain odds, the most comfortable months at Danville are June, September, and July. The best hours are usually 9 AM to noon in June, 9 AM to noon in September, and 8 AM to 11 AM in July.
| Month | Avg high | Avg low | Rain | Rainy days | Morning fog | Midday cloud | Afternoon wind | Daylight | Comfort |
|---|---|---|---|---|---|---|---|---|---|
| Jan | 56°F | 40°F | 4.3 in | 9 | 20% | 33% | 6 mph | 9.8 h | 58 |
| Feb | 60°F | 42°F | 4.0 in | 8 | 8% | 24% | 7 mph | 10.7 h | 62 |
| Mar | 65°F | 44°F | 3.3 in | 7 | 5% | 29% | 8 mph | 11.9 h | 67 |
| Apr | 69°F | 46°F | 1.5 in | 5 | 2% | 21% | 8 mph | 13.2 h | 79 |
| May | 75°F | 50°F | 0.7 in | 3 | 2% | 17% | 9 mph | 14.2 h | 83 |
| Jun | 82°F | 54°F | 0.1 in | 2 | 3% | 6% | 9 mph | 14.8 h | 89 |
| Jul | 86°F | 57°F | 0.0 in | 0 | 4% | 5% | 8 mph | 14.5 h | 86 |
| Aug | 86°F | 58°F | 0.0 in | 1 | 3% | 6% | 7 mph | 13.6 h | 86 |
| Sep | 84°F | 56°F | 0.1 in | 1 | 3% | 9% | 7 mph | 12.3 h | 88 |
| Oct | 76°F | 51°F | 1.0 in | 4 | 3% | 13% | 7 mph | 11.1 h | 86 |
| Nov | 64°F | 44°F | 2.1 in | 6 | 9% | 23% | 6 mph | 10.0 h | 78 |
| Dec | 56°F | 39°F | 4.3 in | 9 | 23% | 36% | 6 mph | 9.5 h | 56 |
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 Danville's weather different
When the fog burns off
2 PMwhen December fog usually thins (25% foggy at 8 AM)
Fog or low cloud covers Danville in 25% 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 (2%).
When the wind picks up
2 PMwhen afternoon wind builds, March–September
From March through September, wind at Danville typically builds after 2 PM. In May it peaks around 5 PM, averaging 11 mph with 4% of those hours windy, while mornings average 6 mph.
Hot hours
3 habove 85°F on a typical August afternoon
In August, the average temperature stays at or above 85°F for 3 hours a day.
Elevation
−8°Fsummer afternoons at Mount Diablo State Park, 3,488 ft up
Mount Diablo State Park sits 3,488 ft higher, 6.2 miles away. Its summer highs average 8°F cooler and its winter lows 1°F milder than Danville.
Daylight
9.5–14.8 hof daylight, Dec to Jun
Days at Danville range from about 9.5 hours in December to 14.8 hours in June. In mid-June the sun sets around 8:32 PM, and in mid-December around 4:53 PM.
Seasons at Danville
- Warm seasonJun 25 – Sep 26 · highs 82°F+
The warm season lasts about 3.1 months, from Jun 25 to Sep 26, when the average high is 82°F or warmer. Highs peak around Jul 8 at about 86°F.
- Hot afternoonsJul 5 – Aug 30 · highs 85°F+
Average highs reach 85°F or more from Jul 5 to Aug 30.
- Cool seasonNov 27 – Feb 27 · highs 62°F or lower
The cool season runs from Nov 27 to Feb 27, when the average high is 62°F or lower. The coldest nights come around Dec 8, with an average low near 39°F.
- Rainy seasonNov 16 – Apr 2 · 80% of the year's rain
The rainy season runs from Nov 16 to Apr 2, when a day has at least a 20% chance of measurable rain. That stretch brings 80% 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 Nov 1 and half of its annual total by Jan 24.
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, Danville averaged 37 days a year at 90°F or hotter and 2 nights a year at or below freezing. It averaged 17 days a year with at least half an inch of rain and 1 afternoon with wind of 20 mph or more at 2 PM. About 38 mornings a year had 3 or more hours of fog or low cloud.
In the same record, the hottest day was Aug 3, 2026 (101°F) and the coldest night was Feb 10, 2025 (31°F). The wettest day was Feb 14, 2025 (2.47 in.), and the strongest 2 PM gust was 40 mph on Mar 12, 2025.
- 37days at 90°F or hotter
- 2nights at or below freezing
- 17days with ½ in. of rain or more
- 1afternoon with 20+ mph wind
- 38mornings with 3+ hours of fog or low cloud
- Hottest day101°FAug 3, 2026
- Coldest night31°FFeb 10, 2025
- Wettest day2.47 inFeb 14, 2025
- Strongest 2 PM gust40 mphMar 12, 2025
What shapes Danville's weather
Mount Diablo shapes the east side of town. Neighborhoods toward Diablo Road and Blackhawk sit against the mountain's lower slopes, and on clear nights cold air drains down its canyons onto the valley floor. The coldest clear winter mornings can bring frost, and even summer nights cool off much more than the afternoon heat would suggest.
In summer and fall, wildfire is Danville's main weather worry. The grass and oak hills on both sides of the valley dry out by early summer. The Town's hazard planning covers wildfire, Public Safety Power Shutoffs, and wildfire smoke, along with flooding when winter storms are heavy.
Tips for visiting Danville
Reserve Tao House well ahead
Tao House tours need an advance reservation, ideally two weeks out. Tours start from the Museum of the San Ramon Valley at 205 Railroad Avenue.
Leave the car downtown
No personal vehicles are allowed at Tao House, which sits inside a private gated community. Visitors ride a free shuttle from downtown Danville.
Use the Iron Horse Trail
The paved regional trail runs between Concord and Pleasanton on the old railroad right-of-way. Bikes, horses, and dogs are allowed.
Reach Mount Diablo through South Gate
The South Gate entrance is on Mt. Diablo Scenic Boulevard in Blackhawk. Park gates open at 8 a.m. and close at sunset, so plan to drive out before dark.
Prepare for power shutoffs
PG&E may cut power in Public Safety Power Shutoffs during dry, windy fire weather. Sign up for alerts through the Town's hazard page and keep phones and lights charged.
Danville through the seasons
- Spring (March–May)
- Spring is the best hiking season in Las Trampas and on Mount Diablo's lower slopes, while the grass is still green.
- Summer (June–August)
- Summer afternoons are hot with light wind. Plan outdoor time for early morning, when the valley is still cool from the night.
- Fall (September–October)
- Heat often lingers into October, and dry, windy days bring the highest wildfire risk and the chance of power shutoffs.
- Winter (November–February)
- Winter mornings are cold, with frost on the coldest clear days, and afternoons are mild. State Parks says Mount Diablo's best views often come the day after a winter storm.
Activities and the weather that matters
- Touring Tao House: Visitors ride a shuttle into the hills, and the grounds are most pleasant on mild spring and fall days. Summer afternoons there are hot.
- Biking the Iron Horse Trail: The trail is flat and paved. Ride early on summer days, and enjoy winter afternoons, which are usually comfortable.
- Mount Diablo summit drive: Clear, cool days after storms give the longest views. Summer haze often limits them.
Official sources and current conditions
- NPS: Eugene O'Neill National Historic Site, plan your visit
- California State Parks: Mount Diablo State Park
- East Bay Regional Park District: Iron Horse Regional Trail
- Town of Danville: Know your hazards
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 | 83 | 63.1° / 43.8° | 6.6h | 1d | 3.11" | 20 |
| December 2024 | 71 | 59.4° / 43.2° | 5h | 11d | 6.41" | 12 |
| January 2025 | 84 | 60.4° / 38.9° | 7h | 3d | 0.18" | 25 |
| February 2025 | 78 | 61.3° / 42.2° | 6.8h | 1d | 8.33" | 18 |
| March 2025 | 86 | 62.8° / 44° | 8.6h | 0d | 2.67" | 24 |
| April 2025 | 94 | 69.8° / 46.9° | 10h | 0d | 0.38" | 28 |
| May 2025 | 95 | 76.6° / 50.9° | 12.5h | 0d | 0.27" | 30 |
| June 2025 | 97 | 79.9° / 52.8° | 12.8h | 0d | 0" | 30 |
| July 2025 | 95 | 80.9° / 55.9° | 12.6h | 0d | 0" | 31 |
| August 2025 | 91 | 87.1° / 57.8° | 11.5h | 0d | 0" | 27 |
| September 2025 | 92 | 82.6° / 60.2° | 9.9h | 0d | 0.34" | 28 |
| October 2025 | 91 | 73.7° / 52.2° | 8.2h | 0d | 2.26" | 28 |
| November 2025 | 79 | 64.8° / 47.8° | 6.2h | 8d | 3.74" | 15 |
| December 2025 | 67 | 56.2° / 43.4° | 5h | 18d | 4.49" | 4 |
| January 2026 | 76 | 60.7° / 41.9° | 6.6h | 14d | 4.1" | 18 |
| February 2026 | 81 | 64.2° / 43.7° | 6.9h | 3d | 5.55" | 20 |
| March 2026 | 95 | 77.8° / 49.9° | 9.8h | 0d | 0.04" | 30 |
| April 2026 | 89 | 68.8° / 48.5° | 9.5h | 0d | 4.63" | 24 |
| May 2026 | 95 | 74.9° / 51.7° | 11.7h | 0d | 0.62" | 30 |
| June 2026 | 95 | 81.4° / 55.2° | 12.7h | 0d | 0" | 29 |
| July 2026 | 93 | 84.4° / 57.4° | 12h | 0d | 0" | 29 |
| August 2026 | 93 | 87° / 58° | 11.3h | 0d | 0" | 29 |
| September 2026 | 94 | 81.2° / 55.9° | 10.5h | 0d | 0.18" | 28 |
| October 2026 | 87 | 79.1° / 53.7° | 8.3h | 0d | 0.52" | 24 |
Climate Trends
Average Temperature by Month
About the Danville climate charts
The temperature chart compares average monthly highs and lows at Danville, 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 Danville. 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 Danville, the warmest typical hour is 3 PM in August (86°F). The coldest is 7 AM in December (45°F).
- Fog: Fog or low cloud covers Danville in 25% 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 (2%).
- Wind: From March through September, wind at Danville typically builds after 2 PM. In May it peaks around 5 PM, averaging 11 mph with 4% of those hours windy, while mornings average 6 mph.
- Cloud Cover: July middays are the clearest at Danville (5% average cloud cover), and December middays are the cloudiest (36%).
- Solar Radiation: The strongest typical sun at Danville comes at 1 PM in June, averaging 1001 W/m².
How to read the hourly heatmaps for Danville
This heatmap shows how average temperature at Danville 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 Danville. 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 Danville 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 Danville 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 Danville 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 Danville
- October 2026 recap: October 2026 at Danville averaged a high of 79°F, 3°F warmer than the 1991-2020 normal of 76°F. It brought 0.52 in. of rain, compared with a normal of 0.97 in.
- Rain year: The 2025-26 rain year (Oct. 1 to Sep. 30) brought 25.6 in. of rain to Danville, 120% of the 21.4 in. normal.
Location Details
Danville weather questions
Everything you need to know about weather and visiting Danville
What is the weather like at Danville today?
It's 52°F at Danville right now, with a comfort score of 76 (great). Monday's forecast high at Danville is 56°F, 8°F below the mid November normal of 64°F. The best window today is 8 AM to 11 AM, at about 55°F with a 7 mph wind (comfort 58).
What is the best month to visit Danville?
By typical temperature, wind, cloud, humidity, and rain odds, the most comfortable months at Danville are June, September, and July. The best hours are usually 9 AM to noon in June, 9 AM to noon in September, and 8 AM to 11 AM in July. The warm season lasts about 3.1 months, from Jun 25 to Sep 26, when the average high is 82°F or warmer. Highs peak around Jul 8 at about 86°F.
What are the warmest and coldest months at Danville?
July is the warmest month at Danville, with an average high of 86°F. December is the coldest, with an average low of 39°F.
When does the fog burn off at Danville?
Fog or low cloud covers Danville in 25% 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 (2%).
When is it windiest at Danville?
From March through September, wind at Danville typically builds after 2 PM. In May it peaks around 5 PM, averaging 11 mph with 4% of those hours windy, while mornings average 6 mph.
How much rain does Danville get?
January is the wettest month (4.3 in.), out of about 21.4 in. a year. The rainy season runs from Nov 16 to Apr 2, when a day has at least a 20% chance of measurable rain. That stretch brings 80% of the year's rain. The 2025-26 rain year (Oct. 1 to Sep. 30) brought 25.6 in. of rain to Danville, 120% of the 21.4 in. normal.
How does Danville weather compare with Mount Diablo State Park?
Mount Diablo State Park sits 3,488 ft higher, 6.2 miles away. Its summer highs average 8°F cooler and its winter lows 1°F milder than Danville.
What kind of place is Danville?
Danville lies in the middle of the San Ramon Valley along I-680. The Las Trampas high country rises to the west, and Mount Diablo's southern flank rises to the east. Its historic downtown along Railroad Avenue holds the Museum of the San Ramon Valley. That is the boarding point for the National Park Service shuttle to Tao House, where Eugene O'Neill wrote his last plays. The paved Iron Horse Regional Trail follows the old Southern Pacific line through town, and Mount Diablo's South Gate road climbs from the Blackhawk side.
What is Danville weather like in November?
November at Danville averages a high of 64°F and a low of 44°F, with 2.1 in. of rain over about 6 rainy days. Afternoon wind averages 6 mph.
More about Danville 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.
- National Park Service, Eugene O'Neill National Historic Site: Plan your visit (accessed 2026-10-27)
- National Park Service, Eugene O'Neill National Historic Site: Operating hours and seasons (accessed 2026-10-27)
- East Bay Regional Park District, Iron Horse Regional Trail (accessed 2026-10-27)
- California State Parks, Mount Diablo State Park (accessed 2026-10-27)
- Town of Danville, Know your hazards (accessed 2026-10-27)
Rendered 2026-11-15T12:04:17.099Z.