The weather in Manassas in July is hot. The average temperatures are between 20°C and 32°C.
You can expect about 3 to 8 days of rain in Manassas during the month of July. 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 Manassas in July 2025.
If you’re planning to visit Manassas in the near future, we highly recommend that you review the 14 day weather forecast for Manassas before you arrive.
Temperatures
32° / 20°
Rainy Days
6
Snowy Days
0
Dry Days
25
Rainfall
132
mm
Sun Hours
8.0
Hrs
