Weather Alert
Vacaville Weather Warning NWS WEATHER ALERT FOR THE VACAVILLE, CA AREA - Issued: 116 PM PDT Sun Oct 4 2026 Vacaville Weather Warning

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Vacaville, CA Weather Forecast

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Vacaville, CA Weather Forecast

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Vacaville CA weather - Clear - 92°F
Clear
92°F
Updated 1:50 pm
Feels Like 92°F
Humidity 17%
Wind NNE 10 mph
Barometer  29.9 in
Dew Point 42°F
Vacaville CA weather - Clear - 33°C
Clear
33°C
Updated 1:50 pm
Feels Like 33°C
Humidity 17%
Wind NNE 16 km/h
Barometer  101.2 kPa
Dew Point 6°C
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Vacaville Weather Forecast

TONIGHT MONDAY MONDAY NIGHT TUESDAY TUESDAY NIGHT WEDNESDAY WEDNESDAY NIGHT THURSDAY THURSDAY NIGHT FRIDAY FRIDAY NIGHT SATURDAY
Vacaville, CA Weather - Tonight Clearing Vacaville, CA Weather - Monday Sunny Vacaville, CA Weather - Monday Night Clear Vacaville, CA Weather - Tuesday Sunny Vacaville, CA Weather - Tuesday Night Clear Vacaville, CA Weather - Wednesday Sunny Vacaville, CA Weather - Wednesday Night Clear Vacaville, CA Weather - Thursday Clear Vacaville, CA Weather - Thursday Night Clear Vacaville, CA Weather - Friday Clear Vacaville, CA Weather - Friday Night Clear Vacaville, CA Weather - Saturday Mostly Clear
Clearing Sunny Clear Sunny Clear Sunny Clear Clear Clear Clear Clear Mostly Clear
Lo: 66°FLo: 19°C Hi: 100°FHi: 38°C
 Lo: 67°FLo: 19°C Hi: 101°FHi: 38°C
 Lo: 67°FLo: 19°C Hi: 100°FHi: 38°C
 Lo: 64°FLo: 18°C Hi: 96°FHi: 36°C
Lo: 64°FLo: 18°C		 Hi: 96°FHi: 36°C
Lo: 64°FLo: 18°C		 Hi: 88°FHi: 31°C
Lo: 60°FLo: 16°C		 Hi: 88°FHi: 31°C
Lo: 60°FLo: 16°C		 Hi: 78°FHi: 26°C
Lo: 58°FLo: 14°C
POP = Probability of Precipitation.
Weather Outlook Updated: 121 PM PDT Sun Oct 04 2026 Vacaville, CA Weather - WeatherWorld.com

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Issued: 137 PM PDT Sun Oct 4 2026

Key Messages

  • Heat Advisory in effect till 10 PM Wednesday for the Sacramento Valley, Delta, northern San Joaquin Valley, and adjacent foothills.
  • Widespread Moderate HeatRisk with areas of Major HeatRisk through Thursday for the Delta, Valley, and Foothills.
  • Confidence is increasing for a cooling trend late next weekend, with the potential for unsettled weather.

Discussion

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...Today through Thursday...

High pressure dominates the western United States, with a slight weak shortwave off the CA coast....