The temperatures in West Chester in September are comfortable with low of 62°F and and high up to 78°F.
You can expect about 3 to 8 days of rain in West Chester during the month of September. 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 West Chester in September 2025.
If you’re planning to visit West Chester in the near future, we highly recommend that you review the 14 day weather forecast for West Chester before you arrive.
Temperatures
78° / 62°
Rainy Days
5
Snowy Days
0
Dry Days
25
Rainfall
4.33
in
Sun Hours
10.3
Hrs
