The weather in Fairfax in August is hot. The average temperatures are between 20°C and 31°C.
You can expect about 3 to 8 days of rain in Fairfax during the month of August. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.
Our weather forecast can give you a great sense of what weather to expect in Fairfax in August 2025.
If you’re planning to visit Fairfax in the near future, we highly recommend that you review the 14 day weather forecast for Fairfax before you arrive.
Temperatures
31° / 20°
Rainy Days
7
Snowy Days
0
Dry Days
24
Rainfall
162
mm
Sun Hours
11.1
Hrs
