Tacoma Weather in September

What's the weather like in Tacoma (Washington) in September 2025?

The climate in Tacoma during September can be summarized as mild and reasonably dry.

September is in the fall / autumn in Tacoma and is typically the 4th warmest month of the year. Daytime maximum temperatures average around 21°C (70°F), whilst at night 9°C (48°F) is normal.

Tacoma weather averages (imperial / metric)
Daytime temperature 21.2°C 70.2°F
Nightly temperature 9°C 48.2°F
Average temperature 15.1°C 59.2°F
Daily sunshine 8 hrs
Avg rainfall 48 mm 1.9 ins
Rainy days 9 days
Sea temperature 12.8°C 55.1°F
Humidity 74%
Windspeed 11.5kph 7 mph

On average September is the 5th driest month of the year in Tacoma with around 48mm 1.9 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 9 days, although this may vary considerably.

On the flip side this corresponds to an average of 8 hours of sunshine per day.

September temperatures in Tacoma

Tacoma average temperature in September

September rainfall

Tacoma average rain in September

September hourly sunshine

Tacoma average rain in September

The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Tacoma in September 2025.

Other monthly averages

Best places to visit in September

UV index Best time to go?

Beta

Current (hourly) weather 15 day forecast

Tacoma weather stats

Tacoma weather statistics
Hottest month: August 24.1°C 75.4°F
Driest month: July 21mm 0.8ins
Sunniest month: July 11hrs
Coldest month: January 7°C 44.6°F
Wettest month: January 162mm 6.4ins
Map showing location of Tacoma (47.25288, -122.44429) Tacoma map pin © Google

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