The weather in Vacaville in August is hot. The average temperatures are between 15°C and 33°C. Usually the days in August are hot while the nights are a bit cooler.
You can expect up to 3 rainy days in Vacaville during the month of August.
Our weather forecast can give you a great sense of what weather to expect in Vacaville in August 2025.
If you’re planning to visit Vacaville in the near future, we highly recommend that you review the 14 day weather forecast for Vacaville before you arrive.
Temperatures
33° / 15°
Rainy Days
0
Snowy Days
0
Dry Days
31
Rainfall
0
mm
Sun Hours
11.7
Hrs
