The temperatures in Tacoma in September are quite cold with temperatures between 9°C and 22°C, warm clothes are a must.
You can expect about 3 to 8 days of rain in Tacoma 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 Tacoma in September 2025.
If you’re planning to visit Tacoma in the near future, we highly recommend that you review the 14 day weather forecast for Tacoma before you arrive.
Temperatures
22° / 9°
Rainy Days
4
Snowy Days
0
Dry Days
26
Rainfall
70
mm
Sun Hours
10.7
Hrs
