Weather in September 2025

Washington weather in September 2025

The temperatures in Washington in September are comfortable with low of 11°C and and high up to 23°C.

You can expect about 3 to 8 days of rain in Washington 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 Washington in September 2025.

If you’re planning to visit Washington in the near future, we highly recommend that you review the 14 day weather forecast for Washington before you arrive.

Temperatures
Temperatures
23° / 11°
Rainy Days
Rainy Days
4
Snowy Days
Snowy Days
0
Dry Days
Dry Days
26
Rainfall
Rainfall
95
mm
10.4
Sun Hours
10.4
Hrs

Washington annual weather

Month Temperatures Rainy Days Dry Days Snowy Days Rainfall Weather More details
January 8° / 2° 13 16 2 263 mm
Awful
February 8° / 2° 11 13 4 201 mm
Awful
March 11° / 3° 13 16 2 217 mm
Awful
April 14° / 4° 9 20 1 154 mm
Ok
May 19° / 6° 6 25 0 98 mm
Good
June 22° / 9° 4 26 0 84 mm
Good
July 27° / 11° 1 30 0 14 mm
Perfect
August 27° / 12° 1 30 0 20 mm
Perfect
September 23° / 11° 4 26 0 95 mm
Perfect
October 16° / 8° 9 22 0 201 mm
Ok
November 10° / 4° 13 17 1 222 mm
Bad
December 7° / 1° 12 17 2 261 mm
Awful
Temperatures in Washington in September
Rain in Washington in September

Recommended Hotels in Washington

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Weather in Washington in September - FAQ

What is the average temperature in Washington in September?
The average temperature in Washington in September is 11/23° C.
What is the chance of rain in Washington in September?
On average, there are 4 rainy days in Washington during September.
Weather wise, is September a good time to visit Washington?
The weather in Washington in September is perfect.
Can it snow in Washington in September?
On average, there are 0 snowy days in Washington in September.
Cities in Washington

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