The temperatures in Chantilly in September are comfortable with low of 16°C and and high up to 27°C.
You can expect about 3 to 8 days of rain in Chantilly 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 Chantilly in September 2025.
If you’re planning to visit Chantilly in the near future, we highly recommend that you review the 14 day weather forecast for Chantilly before you arrive.
Temperatures
27° / 16°
Rainy Days
6
Snowy Days
0
Dry Days
24
Rainfall
120
mm
Sun Hours
10.0
Hrs