California · NWS STO office

Vacaville, CA weather

It is 46°F and clear at Vacaville Nut Tree Airport as of Oct 28, 2:05 AM PDT. Overnight: Mostly Clear, low near 50°F. Forecast from the National Weather Service, issued Oct 28, 2:01 AM PDT.

Updated Oct 28, 2:16 AM PDT (snapshot)

Current conditions

Temperature

46°F

Clear

Wind

Calm

Humidity 93% · dew point 45°F

Pressure · visibility

30.02 inHg

Visibility 10 mi

Observed at Vacaville Nut Tree Airport (KVCB), Oct 28, 2:05 AM PDT. Station readings can lag or be missing.

Alerts for this area

No active NWS alerts cover the Vacaville forecast zone right now.

Around the NWS STO forecast area

No active alerts in zones served by the STO office near Vacaville.

From the alert snapshot of Oct 28, 2026, 5:12 AM EDT. California has 8 active alerts: see them all.

For official warnings, check weather.gov and your local authorities. OpenForecast repeats National Weather Service alerts and may be delayed or incomplete. Follow instructions from emergency officials.

Next 24 hours

Hourly forecast for Vacaville (local time)
TimeTempForecastPrecip. chanceWind
Wed 2 AM53°FClear0%NNW 3 mph
Wed 3 AM52°FClear0%NNW 5 mph
Wed 4 AM52°FMostly Clear0%NNW 7 mph
Wed 5 AM51°FMostly Clear0%N 7 mph
Wed 6 AM51°FSunny0%NNW 7 mph
Wed 7 AM50°FSunny0%NNW 7 mph
Wed 8 AM50°FSunny0%NNW 7 mph
Wed 9 AM54°FSunny0%N 8 mph
Wed 10 AM59°FSunny0%N 9 mph
Wed 11 AM63°FSunny0%N 10 mph
Wed 12 PM65°FSunny0%N 9 mph
Wed 1 PM67°FSunny0%N 7 mph
Wed 2 PM69°FSunny0%N 6 mph
Wed 3 PM70°FMostly Sunny0%N 5 mph
Wed 4 PM71°FMostly Sunny0%N 3 mph
Wed 5 PM71°FMostly Sunny0%N 2 mph
Wed 6 PM68°FPartly Cloudy0%SSW 1 mph
Wed 7 PM65°FPartly Cloudy0%SW 1 mph
Wed 8 PM61°FMostly Clear0%WSW 1 mph
Wed 9 PM57°FMostly Clear0%W 1 mph
Wed 10 PM56°FPartly Cloudy0% 0 mph
Wed 11 PM55°FPartly Cloudy0% 0 mph
Thu 12 AM55°FMostly Cloudy0% 0 mph
Thu 1 AM54°FMostly Cloudy0% 0 mph

Hourly values come from the NWS gridded forecast for the 2.5 km grid square that covers the city's center point. Conditions elsewhere in Vacaville can differ.

7-day forecast

Overnight

Low 50°F

Mostly clear, with a low around 50. North northwest wind 3 to 7 mph.

Wednesday

High 71°F·Low 50°F

Sunny, with a high near 71. North wind 2 to 10 mph, with gusts as high as 20 mph.

Wednesday Night: Partly cloudy, with a low around 50. West southwest wind around 1 mph.

Thursday

High 68°F·Low 49°F

Mostly cloudy, with a high near 68. Northeast wind 0 to 3 mph.

Thursday Night: Mostly cloudy, with a low around 49. Southwest wind 0 to 3 mph.

Friday

High 69°F·Low 47°F

Sunny, with a high near 69.

Friday Night: Partly cloudy, with a low around 47.

Saturday

High 64°F·Low 47°F

Mostly cloudy, with a high near 64.

Saturday Night: Partly cloudy, with a low around 47.

Sunday

High 68°F·Low 50°F

Sunny, with a high near 68.

Sunday Night: Mostly clear, with a low around 50.

Monday

High 69°F·Low 50°F

Mostly sunny, with a high near 69.

Monday Night: Mostly cloudy, with a low around 50.

Tuesday

High 68°F

A chance of rain after 10am. Mostly sunny, with a high near 68.

Nearby cities

Larger cities in the area

Other cities in Solano County

See every city we cover in California, or check all active alerts.

About this forecast

Forecast office
Vacaville is served by the National Weather Service STO forecast office, forecast zone CAZ155, county zone CAC095.
Location used
The Census Bureau's internal point for Vacaville (38.3586, -121.9686), in Solano County. Population: 103,994 (2024 estimate), number 68 of the 296 California cities on this site.
Radar
Nearest NWS radar: KDAX. View it on radar.weather.gov.

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Sources

  • Forecast, hourly forecast, observations and alerts: National Weather Service API, api.weather.gov/points/38.3586,-121.9686 (forecast issued Oct 28, 2:01 AM PDT).
  • Official forecast page: forecast.weather.gov.
  • City location and population: U.S. Census Bureau, Vintage 2024 population estimates and 2024 Gazetteer files.
  • Snapshot taken Oct 28, 2026. The NWS and Census Bureau do not endorse OpenForecast.

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