The temperatures in Passaic in September are comfortable with low of 17°C and and high up to 25°C.
You can expect about 3 to 8 days of rain in Passaic 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 Passaic in September 2025.
If you’re planning to visit Passaic in the near future, we highly recommend that you review the 14 day weather forecast for Passaic before you arrive.
Temperatures
25° / 17°
Rainy Days
5
Snowy Days
0
Dry Days
25
Rainfall
100
mm
Sun Hours
10.2
Hrs
