Yountville Weather
Town • San Francisco Bay Area
Yountville packs a famous restaurant scene into a flat, walkable town of a few streets on the valley floor, about 8 miles north of downtown Napa. The Veterans Home of California spreads across the hills on the other side of Highway 29. The Yountville Mile path, the first finished piece of the Napa Valley Vine Trail, runs through town. A cluster of low knolls just to the north, the Yountville Hills, stands between the town and the open vineyards of Oakville.
Plan your week
10-Day Forecast
Hour by hour
Hourly Forecast
Current Conditions
Comfort Breakdown
Yountville weather today and through the year
It's 53°F at Yountville right now (feels like 50°F), with 5 mph wind and a comfort score of 77. Today's forecast high at Yountville is 58°F, 8°F below the mid November normal of 66°F. No fog in the forecast for today at Yountville. In November, 16% of morning hours here are foggy on average. The best window today is 9 AM to noon, at about 53°F with a 3 mph wind (comfort 59).
August is the warmest month at Yountville, with an average high of 88°F. December is the coldest, with an average low of 38°F. December is the wettest month (5.6 in.), out of about 27.5 in. a year. By typical temperature, wind, cloud, humidity, and rain odds, the most comfortable months at Yountville 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.
Yountville is the next town the bay breeze reaches after Napa, and it still feels that breeze at full strength. Napa Valley Vintners describe this end of the valley as constantly exposed to fog and wind. Cool marine air keeps summer mornings cool, and breezes off San Pablo Bay keep afternoons more comfortable than farther up the valley.
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 Yountville in the next few days
No active National Weather Service alerts for this location.
Fog
No fog in the forecast for today at Yountville. In November, 16% of morning hours here are foggy on average.
Best time to go
The best window today is 9 AM to noon, at about 53°F with a 3 mph wind (comfort 59).
Best day this week
Of the next 7 days, Friday looks best for Yountville, with a 59°F high and midday comfort near 74. Wednesday looks weakest (50).
Rain
Next good chance of rain: today (67%, about 0.38 in.).
Live weather map
Weather around Yountville right now
Overcast and 53° at Yountville right now.
About the live weather map for Yountville
The map centers on Yountville 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.
Yountville vs nearby places
Typical summer conditions compared with Yountville, 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 Yountville |
|---|---|---|---|---|---|
| Oakville | 3.5 mi | +2°F | 24% | 8 mph | a very similar climate |
| Rutherford | 5.2 mi | +2°F | 23% | 8 mph | a very similar climate |
| Napa | 8.2 mi | -4°F | 25% | 9 mph | about 4°F cooler on summer afternoons |
| Lake Berryessa | 15.9 mi | +2°F | 1% | 8 mph | less summer morning fog (1% vs 29% of morning hours) |
| Vacaville | 20.4 mi | +3°F | 1% | 9 mph | less summer morning fog (1% vs 29% of morning hours) |
| Winters | 22.8 mi | +5°F | 1% | 7 mph | less summer morning fog (1% vs 29% of morning hours) and about 5°F warmer on summer afternoons |
Places with a climate like Yountville's
- Calistoga (17 mi away): nearly the same temperatures every month
- Morgan Hill (96 mi away): similar temperatures through the year
- Windsor (27 mi away): similar temperatures through the year
Climate Dashboard
Current conditions vs. NOAA normals and recent destination baseline
What the Yountville climate comparisons mean
These cards compare recent conditions at Yountville 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 Yountville 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.
Yountville weather by month
August is the warmest month at Yountville, with an average high of 88°F. December is the coldest, with an average low of 38°F. December is the wettest month (5.6 in.), out of about 27.5 in. a year. Morning fog peaks in August, when fog or low cloud covers 33% of the hours from 6 to 10 AM. June has the clearest middays, with clouds covering about 9% of the sky from 11 AM to 3 PM.
By typical temperature, wind, cloud, humidity, and rain odds, the most comfortable months at Yountville 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 | 58°F | 38°F | 5.6 in | 10 | 24% | 31% | 6 mph | 9.8 h | 43 |
| Feb | 62°F | 40°F | 5.5 in | 10 | 14% | 24% | 7 mph | 10.7 h | 50 |
| Mar | 67°F | 42°F | 3.8 in | 8 | 15% | 29% | 7 mph | 11.9 h | 67 |
| Apr | 71°F | 44°F | 1.6 in | 5 | 16% | 22% | 7 mph | 13.2 h | 78 |
| May | 77°F | 49°F | 0.9 in | 4 | 19% | 18% | 8 mph | 14.3 h | 80 |
| Jun | 84°F | 53°F | 0.2 in | 2 | 21% | 9% | 9 mph | 14.8 h | 78 |
| Jul | 87°F | 55°F | 0.0 in | 0 | 32% | 9% | 9 mph | 14.6 h | 77 |
| Aug | 88°F | 54°F | 0.1 in | 1 | 33% | 9% | 8 mph | 13.6 h | 78 |
| Sep | 86°F | 52°F | 0.1 in | 1 | 24% | 12% | 7 mph | 12.3 h | 82 |
| Oct | 78°F | 48°F | 1.3 in | 5 | 18% | 15% | 6 mph | 11.1 h | 82 |
| Nov | 66°F | 42°F | 2.8 in | 7 | 16% | 20% | 6 mph | 10.0 h | 71 |
| Dec | 58°F | 38°F | 5.6 in | 10 | 26% | 34% | 6 mph | 9.5 h | 38 |
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 Yountville's weather different
When the fog burns off
10 AMwhen August fog usually thins (47% foggy at 8 AM)
Fog or low cloud covers Yountville in 47% of 8 AM hours in August, the foggiest month. It usually thins to a third of that by 10 AM. February mornings are the least foggy (14%).
When the wind picks up
noonwhen afternoon wind builds, April–August
From April through August, wind at Yountville typically builds after noon. In June it peaks around 4 PM, averaging 9 mph with 5% of those hours windy, while mornings average 6 mph.
Hot hours
5 habove 85°F on a typical July afternoon
In July, the average temperature stays at or above 85°F for 5 hours a day.
Microclimate
−4°FNapa, 8.2 mi away, on summer afternoons
Napa, 8.2 miles away, runs about 4°F cooler than Yountville on summer afternoons.
Daylight
9.5–14.8 hof daylight, Dec to Jun
Days at Yountville range from about 9.5 hours in December to 14.8 hours in June. In mid-June the sun sets around 8:33 PM, and in mid-December around 4:54 PM.
Seasons at Yountville
- Warm seasonJun 26 – Sep 24 · highs 85°F+
The warm season lasts about 3 months, from Jun 26 to Sep 24, when the average high is 85°F or warmer. Highs peak around Aug 8 at about 88°F.
- Cool seasonNov 27 – Feb 27 · highs 64°F or lower
The cool season runs from Nov 27 to Feb 27, when the average high is 64°F or lower. The coldest nights come around Dec 8, with an average low near 38°F.
- Rainy seasonNov 5 – Apr 8 · 85% of the year's rain
The rainy season runs from Nov 5 to Apr 8, when a day has at least a 20% chance of measurable rain. That stretch brings 85% 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 24 and half of its annual total by Jan 23.
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, Yountville averaged 29 days a year at 90°F or hotter and 2 nights a year at or below freezing. It averaged 22 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 144 mornings a year had 3 or more hours of fog or low cloud.
In the same record, the hottest day was Jun 11, 2026 (101°F) and the coldest night was Feb 10, 2025 (31°F). The wettest day was Nov 22, 2024 (5.02 in.), and the strongest 2 PM gust was 41 mph on Mar 12, 2025.
- 29days at 90°F or hotter
- 2nights at or below freezing
- 22days with ½ in. of rain or more
- 1afternoon with 20+ mph wind
- 144mornings with 3+ hours of fog or low cloud
- Hottest day101°FJun 11, 2026
- Coldest night31°FFeb 10, 2025
- Wettest day5.02 inNov 22, 2024
- Strongest 2 PM gust41 mphMar 12, 2025
What shapes Yountville's weather
What sets Yountville apart from Oakville, just 3 miles north, is the Yountville Hills. These knolls act as a partial barrier to the marine air and fog moving up the valley. Low cloud and the afternoon wind tend to linger around town and weaken beyond the hills. On a typical summer afternoon, that makes Yountville a little cooler and breezier than the vineyards to its north.
Being low and flat, the town also collects cold air on clear, still nights. The swing between a cool dawn and a warm afternoon is wide most of the year. Visitors notice it most in summer, when a pleasant 4 p.m. patio turns chilly soon after the sun drops behind the Mayacamas.
Tips for visiting Yountville
Park once and walk
Free public parking is available at the Park and Ride lot, the Community Center, and town parks. Overnight parking is prohibited.
Ride the free Bee shuttle
The Bee is a free on-demand electric bus within Yountville that connects with VINE buses to Calistoga and Napa. No advance reservation is needed.
Bike the Vine Trail south to Napa
A car-free Vine Trail section links Yountville with Napa through Oak Knoll, so the ride south stays off the highway.
Expect a change north of the hills
The Yountville Hills form a barrier to marine air and fog moving up the valley, so sky and temperature can change quickly once you drive north of them.
Bring a layer for dinner outside
Bay breezes cool summer evenings fast, and Napa Valley Vintners note a wide daily temperature swing at this end of the valley.
Yountville through the seasons
- Spring (March–May)
- Spring brings cool mornings and mild afternoons, and the afternoon breeze picks up again by May. Mustard and new vine growth make it a good walking season.
- Summer (June–August)
- Summer mornings are often gray and cool, and afternoons are warm with a steady bay breeze. Hot spells reach the low 90s °F, a little cooler than upvalley towns.
- Fall (September–October)
- Fall is harvest season, and September stays nearly as warm as August as the bay breeze weakens. Days are clear, and evenings still cool off quickly.
- Winter (November–February)
- Winter is the rainy season, with chilly, sometimes foggy mornings on the valley floor and bright, crisp days between storms.
Activities and the weather that matters
- Dining on patios: Lunch outside works most of the year. Summer evenings turn cool once the bay breeze arrives, so plan on a jacket after sunset.
- Walking and biking the Yountville Mile: The town path is the first piece of the Vine Trail. Morning is calmest, and the afternoon south wind makes the ride back toward Napa a headwind.
- Taking the bus upvalley: On hot summer days, VINE's upvalley bus lets you visit St. Helena or Calistoga without driving, and come back to the cooler end of the valley for dinner.
Official sources and current conditions
- Town of Yountville: transportation and parking
- VINE Transit Route 10 (Up Valley Connector)
- Napa Valley Vine Trail
- Napa Valley Vintners: Yountville AVA
- National Weather Service, San Francisco Bay Area
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 | 78 | 62.2° / 43.8° | 6.3h | 5d | 14.86" | 18 |
| December 2024 | 70 | 59.4° / 44.1° | 4.9h | 10d | 9.62" | 13 |
| January 2025 | 82 | 59.6° / 40.7° | 7.1h | 7d | 0.32" | 23 |
| February 2025 | 76 | 60.4° / 42.7° | 6.5h | 5d | 14.8" | 15 |
| March 2025 | 81 | 61.4° / 43.5° | 7.6h | 3d | 4.02" | 20 |
| April 2025 | 89 | 69.3° / 46.6° | 9.3h | 5d | 0.7" | 26 |
| May 2025 | 93 | 78.4° / 50° | 11.8h | 5d | 0.18" | 30 |
| June 2025 | 92 | 81.5° / 50.1° | 11.4h | 7d | 0" | 30 |
| July 2025 | 90 | 82.1° / 52.9° | 11.2h | 12d | 0" | 31 |
| August 2025 | 86 | 88° / 54.7° | 10.8h | 10d | 0" | 29 |
| September 2025 | 88 | 82.3° / 57.1° | 9.2h | 6d | 0.1" | 28 |
| October 2025 | 86 | 72.3° / 52° | 7.5h | 8d | 1.61" | 26 |
| November 2025 | 79 | 63.2° / 48.4° | 6.4h | 9d | 5.5" | 15 |
| December 2025 | 64 | 54.9° / 43.9° | 4.7h | 13d | 7.29" | 6 |
| January 2026 | 79 | 61.4° / 43.4° | 6.5h | 3d | 6.41" | 21 |
| February 2026 | 78 | 62.9° / 45.1° | 6.3h | 5d | 5.82" | 16 |
| March 2026 | 93 | 77.2° / 50.5° | 9.7h | 3d | 0.06" | 30 |
| April 2026 | 86 | 68.2° / 47.2° | 9.1h | 5d | 4.35" | 23 |
| May 2026 | 91 | 75.4° / 51.5° | 11h | 6d | 0.77" | 30 |
| June 2026 | 91 | 82.8° / 53.7° | 11.7h | 9d | 0" | 29 |
| July 2026 | 90 | 85.9° / 54.4° | 11.1h | 8d | 0" | 30 |
| August 2026 | 87 | 84.9° / 54.3° | 10h | 15d | 0" | 28 |
| September 2026 | 88 | 81.4° / 53.7° | 9.5h | 7d | 0.54" | 25 |
| October 2026 | 89 | 79.2° / 49.8° | 8.4h | 4d | 0.36" | 28 |
Climate Trends
Average Temperature by Month
About the Yountville climate charts
The temperature chart compares average monthly highs and lows at Yountville, 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 Yountville. 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 Yountville, the warmest typical hour is 4 PM in July (90°F). The coldest is 7 AM in December (45°F).
- Fog: Fog or low cloud covers Yountville in 47% of 8 AM hours in August, the foggiest month. It usually thins to a third of that by 10 AM. February mornings are the least foggy (14%).
- Wind: From April through August, wind at Yountville typically builds after noon. In June it peaks around 4 PM, averaging 9 mph with 5% of those hours windy, while mornings average 6 mph.
- Cloud Cover: June middays are the clearest at Yountville (9% average cloud cover), and December middays are the cloudiest (34%).
- Solar Radiation: The strongest typical sun at Yountville comes at 1 PM in June, averaging 992 W/m².
How to read the hourly heatmaps for Yountville
This heatmap shows how average temperature at Yountville 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 Yountville. 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 Yountville 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 Yountville 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 Yountville 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 Yountville
- October 2026 recap: October 2026 at Yountville averaged a high of 79°F, 7°F warmer than October 2025 (72°F).
- Rain year: The 2025-26 rain year (Oct. 1 to Sep. 30) brought 32.4 in. of rain to Yountville, 118% of the 27.5 in. normal.
Location Details
Yountville weather questions
Everything you need to know about weather and visiting Yountville
What is the weather like at Yountville today?
It's 53°F at Yountville right now, with a comfort score of 77 (great). Today's forecast high at Yountville is 58°F, 8°F below the mid November normal of 66°F. The best window today is 9 AM to noon, at about 53°F with a 3 mph wind (comfort 59).
What is the best month to visit Yountville?
By typical temperature, wind, cloud, humidity, and rain odds, the most comfortable months at Yountville 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 26 to Sep 24, when the average high is 85°F or warmer. Highs peak around Aug 8 at about 88°F.
What are the warmest and coldest months at Yountville?
August is the warmest month at Yountville, with an average high of 88°F. December is the coldest, with an average low of 38°F.
When does the fog burn off at Yountville?
Fog or low cloud covers Yountville in 47% of 8 AM hours in August, the foggiest month. It usually thins to a third of that by 10 AM. February mornings are the least foggy (14%).
When is it windiest at Yountville?
From April through August, wind at Yountville typically builds after noon. In June it peaks around 4 PM, averaging 9 mph with 5% of those hours windy, while mornings average 6 mph.
How much rain does Yountville get?
December is the wettest month (5.6 in.), out of about 27.5 in. a year. The rainy season runs from Nov 5 to Apr 8, when a day has at least a 20% chance of measurable rain. That stretch brings 85% of the year's rain. The 2025-26 rain year (Oct. 1 to Sep. 30) brought 32.4 in. of rain to Yountville, 118% of the 27.5 in. normal.
How does Yountville weather compare with Napa?
Napa, 8.2 miles away, runs about 4°F cooler than Yountville on summer afternoons.
What kind of place is Yountville?
Yountville packs a famous restaurant scene into a flat, walkable town of a few streets on the valley floor, about 8 miles north of downtown Napa. The Veterans Home of California spreads across the hills on the other side of Highway 29. The Yountville Mile path, the first finished piece of the Napa Valley Vine Trail, runs through town. A cluster of low knolls just to the north, the Yountville Hills, stands between the town and the open vineyards of Oakville.
What is Yountville weather like in November?
November at Yountville averages a high of 66°F and a low of 42°F, with 2.8 in. of rain over about 7 rainy days. About 16% of morning hours are foggy. Afternoon wind averages 6 mph.
More about Yountville 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.
- Town of Yountville, Transportation & Parking (accessed 2026-10-27)
- Napa Valley Vine Trail Coalition, The Vine Trail (accessed 2026-10-27)
- Napa Valley Vintners, Yountville AVA (accessed 2026-10-27)
- Wine Spectator, Napa 101: Explore the Valley Floor AVAs (Jan. 15, 2018) (accessed 2026-10-27)
- VINE Transit, Route 10 Up Valley Connector (accessed 2026-10-27)
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