The weather in Modesto in August is hot. The average temperatures are between 18°C and 37°C. Usually the days in August are hot while the nights are a bit cooler.
There shouldn't be any rainy days in in Modesto during August. Having said that, the days are very hot in August so hanging out outside is more recomanded during the after noons and evening time.
Our weather forecast can give you a great sense of what weather to expect in Modesto in August 2025.
If you’re planning to visit Modesto in the near future, we highly recommend that you review the 14 day weather forecast for Modesto before you arrive.
Temperatures
37° / 18°
Rainy Days
0
Snowy Days
0
Dry Days
31
Rainfall
2
mm
Sun Hours
12.0
Hrs
