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Vacaville, CA Weather
Current conditions
Forecast for this hour (no station report in the last two hours)
Forecast
10-day-
Tonight
A slight chance of rain before 7pm. Partly cloudy. Low around 54, with temperatures rising to around 56 overnight. Southwest wind 0 to 5 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
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Friday
Mostly sunny, with a high near 71. North northwest wind 0 to 17 mph, with gusts as high as 29 mph.
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Friday Night
Clear, with a low around 55. North northwest wind 7 to 21 mph, with gusts as high as 40 mph.
National Weather Service forecast updated 14 hrs ago.
Hourly
Hourly forecast- Now57°
- 2 AM56°
- 3 AM56°
- 4 AM56°
- 5 AM56°
- 6 AM56°
- 7 AM56°
- 8 AM55°
- 9 AM57°
- 10 AM60°
- 11 AM62°
- 12 PM64°
- 1 PM67°
- 2 PM69°
- 3 PM70°
- 4 PM71°
- 5 PM70°
- 6 PM68°
- 7 PM65°
- 8 PM62°
- 9 PM61°
- 10 PM62°
- 11 PM62°
- Sat12 AM62°
Daily forecast
Details- ThuOct 22Light Rain78%54°68°
- TodayOct 23Mostly Sunny55°71°
- SatOct 24Sunny51°74°
- SunOct 25Sunny51°74°
- MonOct 26Sunny51°74°
- TueOct 27Sunny52°73°
- WedOct 28Mostly Sunny51°72°
- ThuOct 29Cloudy54°74°
- FriOct 30Cloudy51°78°
Days after the National Weather Service's seven are MET Norway's outlook, a computer model with no forecaster's review.
Radar
Full mapWeather news near Vacaville
More weather news- Sacramento Weather Forecast Rain Returns After Sunday Warmup
Tuesday remains partly sunny with a high near 70, with rain chances extending into Tuesday night. Rain chances continue Wednesday, with a high near 72. Thursday brings only a slight rain chance before a sunny Friday…
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California weather with Dirk & Heather: How much rain did we get?KCRA California weather with Dirk & Heather: How much rain did we get? Scattered showers and thunderstorms have brought beneficial rain to many places across the state. Scattered showers and thunderstorms have brought…
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Severe weather, flood risk across Four Corners, CaliforniaThe Weather Channel Tornadoes, flooding, large hail possible in Four Corners, California Parts of the Four Corners and Southern California face an elevated risk of severe weather on Thursday, which includes the…
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Southern California weather — Fall Storm Brings Thunderstorms and Flood AdvisoriesA recent Southern California weather system driven by an autumn storm is continuing to bring thunderstorms, lightning, and heavy rain to the region. With localized downpours expected, authorities have issued strict…
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Showery conditions, possible thunderstorms impact Northern California todayCloudy skies are expected across Northern California today, bringing periods of rain and a chance of thunderstorms later in the day. Highs will reach the mid-60s with winds from the south between 10 and 15 mph. Rain and…
- Air quality alert affecting Southern California Thursday
Sacramento Bee The creation of this content included the use of AI based on templates created, reviewed and edited by journalists in the newsroom. Read more on our AI policy here. On Thursday at 7:36 a.m. the NWS…
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Prohibitive U.S. Storm Track; California/Southwest U.S. Primary TargetEarly Season Advancing Snow Cover Climate Impact Company North America Medium Range Report Issued: Thursday October 22, 2026 Chart of the day: NOAA/CPC project prohibitive storm track for early November. Discussion…
- UPDATE: Wind advisory in place for Southern California until Thursday evening
On Thursday at 5:53 a.m. the NWS San Diego CA issued an updated wind advisory valid between 6 a.m. and 6 p.m. The advisory is for Riverside County Mountains, San Diego County Mountains, San Diego County Deserts and San…
- UPDATE: Weather alert for strong thunderstorms in Central California Thursday morning
An updated weather alert was issued by the NWS Los Angeles/Oxnard CA on Thursday at 7:22 a.m. for strong thunderstorms until 8 a.m. The alert is for Ventura County Beaches, Ventura County Inland Coast and Central…
- California and National Drought Summary for October 20, 2026, 10 Day Weather Outlook, and California Drought Statistics: 72% of State Abnormally Dry, A 0% Increase Week-Over-Week
The remaining abnormal dryness (D0) was removed from Southeast Alaska following substantial rainfall and improving moisture conditions. However, moderate drought (D1) persisted in the upper Tanana Valley of eastern…
Air quality
Air quality is satisfactory, and air pollution poses little or no risk.
Forecast
- FriGood (33)
- SatGood (35)
- SunGood (36)
Vacaville, CA reporting area · 1 hr ago. Data from AirNow (EPA and its state, local and tribal partners); preliminary and subject to change.
Sun & moon
Almanac
MonthlyNapa State Hospital, records since 1893. Normals 1991–2020. Data from NOAA's Regional Climate Centers (ACIS).
Nearby
- Sacramento 50 km
- Elk Grove 54 km
- Concord 42 km
- Vallejo 37 km
- Berkeley 59 km
- Fairfield 13 km
- Antioch 42 km
- Richmond 56 km
- Arden-Arcade 60 km
- Napa 27 km
- Pittsburg 38 km
- Walnut Creek 51 km
Forecasters' discussion
From the National Weather Service office in STO, issued 12 hrs ago
Key Messages
- Scattered showers, thunderstorm chances, and high elevation snow showers through this evening. Lingering mountain showers Friday morning.
- Breezy north to east winds develop Friday afternoon into Saturday AM, followed by weaker downsloping winds Sat PM-Sun AM.
- Dry weather continues through most of next week, with potential for unsettled weather Halloween Weekend.
.DISCUSSION...
...Today through Friday AM... Cloudy skies and scattered showers are actively being observed across interior Northern California. Some isolated moderate to heavy rain will be possible at times, but precipitation will largely be light to moderate. Shower activity will gradually trend down through the afternoon hours, but a few scattered light showers may linger over the Sierra. Given the cloud cover and lack of instability as this weather system treks through Southern California, the threat for thunderstorms has largely trended down, but an isolated thunderstorm (10-15% chance) is still possible over the Sierra and Motherlode this afternoon/early evening. Forecast precipitation amounts for the remainder of the day are around 0.10 to 0.20 inches in the Valley, with higher amounts just over 0.50 inches along the Sierra.
Snow levels continue to be around 8000-9000 feet in the Sierra today, with additional snowfall amounts of 1-3 inches at the highest peaks. Best chance for snow will be toward Mono county and into the Yosemite area. Minor impacts are possible at the highest elevations in Tuolumne county and toward Alpine due to the snow.
Aviation
Showers and isolated thunderstorms continue through the afternoon and evening hours, with localized areas of MVFR to IFR ceilings. Best timeframe for thunderstorms will be 2000z through 0400z for all sites with a 10-15% chance of occurrence. Winds will remain light throughout the day outside of erratic winds near thunderstorms. After 06z Friday, showers linger over the Sierra into Friday 18z and fog and stratus in the Valley overnight after 09z Friday with lowered ceilings as low as IFR to LIFR ceilings. Snow levels 7500-8500 feet until lowering after 12z Friday to around 6000-8000 feet.
Sto Watches
None.
Forecasts, observations and alerts in the United States come from the National Weather Service (NOAA); radar from NOAA's Multi-Radar Multi-Sensor system; satellite imagery from NASA's Global Imagery Browse Services (GIBS) and NOAA's GOES satellites; the map from the U.S. Geological Survey's National Map; air quality from AirNow (EPA and its partners); hurricane information from the National Hurricane Center; climate normals and records from NOAA's Regional Climate Centers (ACIS). Forecasts outside the United States and the UV index: MET Norway (CC BY 4.0); observations outside the U.S.: airport reports via NOAA's Aviation Weather Center. Place names: GeoNames (CC BY 4.0). Data are copied on a schedule and may lag the sources; for warnings that affect your safety, follow your local National Weather Service office and emergency officials. Weather news is drawn from the 4Search index and reflects what the press published. Terms of use.