The temperatures in Caldwell in September are comfortable with low of 14°C and and high up to 27°C.
The wather in Caldwell in September can vary between cold and nice weather days. Expect a few rainy days but usually not more than 3.
Our weather forecast can give you a great sense of what weather to expect in Caldwell in September 2025.
If you’re planning to visit Caldwell in the near future, we highly recommend that you review the 14 day weather forecast for Caldwell before you arrive.
Temperatures
27° / 14°
Rainy Days
2
Snowy Days
0
Dry Days
28
Rainfall
11
mm
Sun Hours
10.3
Hrs
