Oakville Weather
Town • San Francisco Bay Area
Oakville is barely a village, just a stretch of Highway 29 between Yountville and Rutherford where the valley floor opens up north of the Yountville Hills. Its best-known stop for travelers is the Oakville Grocery, a wine-country fixture since 1881. Around it lie some of Napa's most famous vineyards, including To Kalon on the gravelly western bench. The Oakville appellation climbs from the valley floor into the Mayacamas foothills on the west and toward the Vaca Mountains on the east.
Plan your week
10-Day Forecast
Hour by hour
Hourly Forecast
Current Conditions
Comfort Breakdown
Oakville weather today and through the year
It's 51°F at Oakville right now (feels like 48°F), with 3 mph wind and a comfort score of 75. Today's forecast high at Oakville is 58°F, 8°F below the mid November normal of 66°F. No fog in the forecast for today at Oakville. In November, 15% 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 58).
July is the warmest month at Oakville, with an average high of 88°F. December is the coldest, with an average low of 38°F. January is the wettest month (5.7 in.), out of about 27.7 in. a year. By typical temperature, wind, cloud, humidity, and rain odds, the most comfortable months at Oakville are September, October, and May. The best hours are usually 9 AM to noon in September, 10 AM to 1 PM in October, and 11 AM to 2 PM in May.
Oakville sits where the valley's climate shifts from bay-cooled to upvalley-hot. It takes heat from the upper valley to the north and cooling from bay fog and breezes to the south. It is also the first open stretch of valley floor north of the Yountville Hills. Those knolls hold back some of the wind and low cloud that hang over Yountville, yet fog still drifts in on summer evenings and early mornings.
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 Oakville in the next few days
No active National Weather Service alerts for this location.
Fog
No fog in the forecast for today at Oakville. In November, 15% 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 58).
Best day this week
Of the next 7 days, Friday looks best for Oakville, with a 60°F high and midday comfort near 73. Wednesday looks weakest (46).
Rain
Next good chance of rain: today (73%, about 0.30 in.).
Live weather map
Weather around Oakville right now
Overcast and 51° at Oakville right now.
About the live weather map for Oakville
The map centers on Oakville 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.
Oakville vs nearby places
Typical summer conditions compared with Oakville, 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 Oakville |
|---|---|---|---|---|---|
| Rutherford | 2 mi | +1°F | 23% | 8 mph | a very similar climate |
| Yountville | 3.5 mi | -2°F | 29% | 8 mph | a very similar climate |
| Sugarloaf Ridge State Park | 5.7 mi | -10°F | 17% | 10 mph | about 10°F cooler on summer afternoons and about 43% more rain a year |
| American Canyon | 19.7 mi | -12°F | 20% | 11 mph | about 12°F cooler on summer afternoons |
| Olompali State Historic Park | 21.3 mi | -10°F | 35% | 9 mph | about 10°F cooler on summer afternoons and more summer morning fog (35% vs 24% of morning hours) |
| Vallejo | 24.3 mi | -12°F | 18% | 9 mph | about 12°F cooler on summer afternoons |
Places with a climate like Oakville's
- Calistoga (14 mi away): nearly the same temperatures every month
- Geyserville (33 mi away): nearly the same temperatures every month
- Morgan Hill (99 mi away): nearly the same temperatures every month
Climate Dashboard
Current conditions vs. NOAA normals and recent destination baseline
What the Oakville climate comparisons mean
These cards compare recent conditions at Oakville 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 Oakville 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.
Oakville weather by month
July is the warmest month at Oakville, with an average high of 88°F. December is the coldest, with an average low of 38°F. January is the wettest month (5.7 in.), out of about 27.7 in. a year. Morning fog peaks in August, when fog or low cloud covers 27% 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 Oakville are September, October, and May. The best hours are usually 9 AM to noon in September, 10 AM to 1 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 | 5.7 in | 10 | 23% | 31% | 5 mph | 9.8 h | 45 |
| Feb | 62°F | 40°F | 5.5 in | 10 | 13% | 24% | 6 mph | 10.7 h | 53 |
| Mar | 67°F | 42°F | 3.9 in | 8 | 14% | 29% | 7 mph | 11.9 h | 69 |
| Apr | 71°F | 44°F | 1.7 in | 5 | 14% | 22% | 7 mph | 13.2 h | 79 |
| May | 78°F | 48°F | 0.9 in | 4 | 15% | 18% | 8 mph | 14.3 h | 81 |
| Jun | 85°F | 53°F | 0.2 in | 2 | 17% | 7% | 8 mph | 14.8 h | 78 |
| Jul | 88°F | 54°F | 0.0 in | 0 | 27% | 6% | 8 mph | 14.6 h | 76 |
| Aug | 88°F | 54°F | 0.0 in | 1 | 27% | 7% | 7 mph | 13.6 h | 77 |
| Sep | 86°F | 52°F | 0.1 in | 1 | 19% | 10% | 7 mph | 12.3 h | 82 |
| Oct | 78°F | 47°F | 1.3 in | 5 | 16% | 15% | 6 mph | 11.1 h | 82 |
| Nov | 66°F | 42°F | 2.8 in | 7 | 15% | 20% | 5 mph | 10.0 h | 73 |
| Dec | 57°F | 38°F | 5.6 in | 10 | 26% | 34% | 5 mph | 9.5 h | 40 |
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 Oakville's weather different
When the fog burns off
10 AMwhen August fog usually thins (41% foggy at 8 AM)
Fog or low cloud covers Oakville in 41% 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 (13%).
When the wind picks up
1 PMwhen afternoon wind builds, March–September
From March through September, wind at Oakville typically builds after 1 PM. In June it peaks around 6 PM, averaging 10 mph with 7% of those hours windy, while mornings average 5 mph.
Hot hours
6 habove 85°F on a typical July afternoon
In July, the average temperature stays at or above 85°F for 6 hours a day.
Elevation
−10°Fsummer afternoons at Sugarloaf Ridge State Park, 1,450 ft up
Sugarloaf Ridge State Park sits 1,450 ft higher, 5.7 miles away. Its summer highs average 10°F cooler and its winter lows 1°F milder than Oakville.
Daylight
9.5–14.8 hof daylight, Dec to Jun
Days at Oakville 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 Oakville
- Warm seasonJun 24 – Sep 25 · highs 85°F+
The warm season lasts about 3.1 months, from Jun 24 to Sep 25, when the average high is 85°F or warmer. Highs peak around Jul 8 at about 88°F.
- Cool seasonNov 27 – Feb 26 · highs 64°F or lower
The cool season runs from Nov 27 to Feb 26, 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 3 – Apr 9 · 86% of the year's rain
The rainy season runs from Nov 3 to Apr 9, when a day has at least a 20% chance of measurable rain. That stretch brings 86% 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, Oakville averaged 43 days a year at 90°F or hotter and 2 nights a year at or below freezing. It averaged 20 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 119 mornings a year had 3 or more hours of fog or low cloud.
In the same record, the hottest day was Jun 11, 2026 (103°F) and the coldest night was Feb 10, 2025 (30°F). The wettest day was Nov 21, 2024 (3.85 in.), and the strongest 2 PM gust was 43 mph on Mar 12, 2025.
- 43days at 90°F or hotter
- 2nights at or below freezing
- 20days with ½ in. of rain or more
- 1afternoon with 20+ mph wind
- 119mornings with 3+ hours of fog or low cloud
- Hottest day103°FJun 11, 2026
- Coldest night30°FFeb 10, 2025
- Wettest day3.85 inNov 21, 2024
- Strongest 2 PM gust43 mphMar 12, 2025
What shapes Oakville's weather
In Oakville, which side of the valley you stand on changes the afternoon. Vineyards on the western bench, tucked under the Mayacamas, fall into shade earlier in the day. The eastern hills toward Silverado Trail and the Vaca Mountains take the full afternoon heat. On a hot day the difference is easy to feel driving Oakville Cross Road from Highway 29 east toward Silverado Trail.
Summer afternoons here are hot, but marine air returns after dark and nights cool sharply. The flat, gravelly floor also lets cold air pool on still winter and spring nights, so an early morning can turn frosty even when the afternoon is mild.
Tips for visiting Oakville
Stock a picnic at Oakville Grocery
The historic store sells local provisions and wine and has an outdoor patio, an easy lunch stop on a mild day.
Book tastings for the morning
Summer temperatures commonly reach the mid-90s °F here, so mornings are the comfortable time for vineyard walks.
Pick the west side late in the day
Western hillside estates are sheltered from afternoon sun, while the eastern side of the appellation gets the warmer afternoon light.
Expect gray early starts in summer
Evening and early-morning fog from the bay is part of Oakville's growing season, so sunrise drives can start under cloud.
Oakville through the seasons
- Spring (March–May)
- Spring brings cool mornings with a chance of frost on the valley floor, and warm afternoons by May.
- Summer (June–August)
- Summer afternoons are hot, often in the mid-90s °F, and evenings and early mornings can bring fog from the bay.
- Fall (September–October)
- Fall is harvest season, and September stays nearly as hot as summer. Fog becomes rarer as the bay breeze weakens.
- Winter (November–February)
- Winter is the rainy season. Bare vines and clear, crisp days between storms make for quiet visits, though still nights can leave frost on the valley floor.
Activities and the weather that matters
- Wine tasting: Comfortable on summer mornings and in the cool evenings. Midafternoon on the sun-facing east side can be hot.
- Picnicking: Best on mild spring and fall days. Summer afternoons are hot in the open, so look for shade.
- Road cycling: Oakville Cross Road links Highway 29 and Silverado Trail across the flat floor. Ride early before the heat and afternoon wind.
Official sources and current conditions
- Napa Valley Vintners: Oakville AVA
- VINE Transit Route 10 (Highway 29 corridor)
- Caltrans QuickMap (Highway 29 conditions)
- 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 | 79 | 63.8° / 43.6° | 6.3h | 3d | 11.73" | 19 |
| December 2024 | 72 | 61° / 43.7° | 4.9h | 10d | 8" | 14 |
| January 2025 | 83 | 61.3° / 40.2° | 7.2h | 7d | 0.3" | 20 |
| February 2025 | 77 | 62.2° / 42.5° | 6.6h | 3d | 11.6" | 17 |
| March 2025 | 82 | 63.2° / 43.7° | 8h | 2d | 3.27" | 20 |
| April 2025 | 91 | 70.9° / 47.2° | 9.8h | 3d | 0.58" | 26 |
| May 2025 | 93 | 80.2° / 50.8° | 12.2h | 4d | 0.11" | 30 |
| June 2025 | 91 | 83.2° / 51.2° | 11.9h | 3d | 0" | 30 |
| July 2025 | 90 | 83.5° / 53.7° | 11.5h | 10d | 0" | 31 |
| August 2025 | 86 | 89.8° / 55.6° | 11.2h | 4d | 0" | 27 |
| September 2025 | 87 | 84.3° / 57.2° | 9.5h | 3d | 0.12" | 26 |
| October 2025 | 87 | 74.4° / 51.6° | 7.6h | 4d | 1.36" | 27 |
| November 2025 | 81 | 65.3° / 48.3° | 6.6h | 8d | 4.35" | 17 |
| December 2025 | 66 | 56.4° / 43.8° | 4.8h | 13d | 6.21" | 7 |
| January 2026 | 80 | 62.8° / 43° | 6.5h | 2d | 5.04" | 22 |
| February 2026 | 79 | 64.7° / 44.8° | 6.2h | 4d | 4.77" | 16 |
| March 2026 | 94 | 79.3° / 50.4° | 9.8h | 2d | 0.03" | 31 |
| April 2026 | 88 | 69.9° / 47.3° | 9.6h | 3d | 3.95" | 24 |
| May 2026 | 92 | 77.3° / 52.4° | 11.4h | 4d | 0.72" | 30 |
| June 2026 | 90 | 84.4° / 54.6° | 12.1h | 6d | 0" | 28 |
| July 2026 | 89 | 87.8° / 55.4° | 11.5h | 5d | 0" | 30 |
| August 2026 | 88 | 87° / 55.4° | 10.5h | 10d | 0" | 29 |
| September 2026 | 87 | 83.3° / 53.8° | 9.6h | 3d | 0.47" | 26 |
| October 2026 | 86 | 81.3° / 49.2° | 8.4h | 3d | 0.31" | 24 |
Climate Trends
Average Temperature by Month
About the Oakville climate charts
The temperature chart compares average monthly highs and lows at Oakville, 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 Oakville. 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 Oakville, the warmest typical hour is 4 PM in July (91°F). The coldest is 7 AM in December (45°F).
- Fog: Fog or low cloud covers Oakville in 41% 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 (13%).
- Wind: From March through September, wind at Oakville typically builds after 1 PM. In June it peaks around 6 PM, averaging 10 mph with 7% of those hours windy, while mornings average 5 mph.
- Cloud Cover: July middays are the clearest at Oakville (6% average cloud cover), and December middays are the cloudiest (34%).
- Solar Radiation: The strongest typical sun at Oakville comes at 1 PM in June, averaging 992 W/m².
How to read the hourly heatmaps for Oakville
This heatmap shows how average temperature at Oakville 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 Oakville. 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 Oakville 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 Oakville 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 Oakville 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 Oakville
- October 2026 recap: October 2026 at Oakville averaged a high of 81°F, 7°F warmer than October 2025 (74°F).
- Rain year: The 2025-26 rain year (Oct. 1 to Sep. 30) brought 26.9 in. of rain to Oakville, 97% of the 27.7 in. normal.
Location Details
Oakville weather questions
Everything you need to know about weather and visiting Oakville
What is the weather like at Oakville today?
It's 51°F at Oakville right now, with a comfort score of 75 (great). Today's forecast high at Oakville 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 58).
What is the best month to visit Oakville?
By typical temperature, wind, cloud, humidity, and rain odds, the most comfortable months at Oakville are September, October, and May. The best hours are usually 9 AM to noon in September, 10 AM to 1 PM in October, and 11 AM to 2 PM in May. The warm season lasts about 3.1 months, from Jun 24 to Sep 25, when the average high is 85°F or warmer. Highs peak around Jul 8 at about 88°F.
What are the warmest and coldest months at Oakville?
July is the warmest month at Oakville, 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 Oakville?
Fog or low cloud covers Oakville in 41% 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 (13%).
When is it windiest at Oakville?
From March through September, wind at Oakville typically builds after 1 PM. In June it peaks around 6 PM, averaging 10 mph with 7% of those hours windy, while mornings average 5 mph.
How much rain does Oakville get?
January is the wettest month (5.7 in.), out of about 27.7 in. a year. The rainy season runs from Nov 3 to Apr 9, when a day has at least a 20% chance of measurable rain. That stretch brings 86% of the year's rain. The 2025-26 rain year (Oct. 1 to Sep. 30) brought 26.9 in. of rain to Oakville, 97% of the 27.7 in. normal.
How does Oakville weather compare with Sugarloaf Ridge State Park?
Sugarloaf Ridge State Park sits 1,450 ft higher, 5.7 miles away. Its summer highs average 10°F cooler and its winter lows 1°F milder than Oakville.
What kind of place is Oakville?
Oakville is barely a village, just a stretch of Highway 29 between Yountville and Rutherford where the valley floor opens up north of the Yountville Hills. Its best-known stop for travelers is the Oakville Grocery, a wine-country fixture since 1881. Around it lie some of Napa's most famous vineyards, including To Kalon on the gravelly western bench. The Oakville appellation climbs from the valley floor into the Mayacamas foothills on the west and toward the Vaca Mountains on the east.
What is Oakville weather like in November?
November at Oakville averages a high of 66°F and a low of 42°F, with 2.8 in. of rain over about 7 rainy days. About 15% of morning hours are foggy. Afternoon wind averages 5 mph.
More about Oakville 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.
- Napa Valley Vintners, Oakville AVA (accessed 2026-10-27)
- Oakville Grocery (accessed 2026-10-27)
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