Weather in September 2025

Snoqualmie Pass weather in September 2025

The weather in Snoqualmie Pass in September is very cold with temperatures between 2°C and 20°C, warm clothes are a must.

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

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

Temperatures
Temperatures
20° / 2°
Rainy Days
Rainy Days
7
Snowy Days
Snowy Days
0
Dry Days
Dry Days
23
Rainfall
Rainfall
109
mm
10.5
Sun Hours
10.5
Hrs

Snoqualmie Pass annual weather

Month Temperatures Rainy Days Dry Days Snowy Days Rainfall Weather More details
January -1° / -10° 12 4 18 374 mm
Awful
February 2° / -10° 12 2 19 331 mm
Awful
March 4° / -7° 14 3 18 311 mm
Awful
April 8° / -4° 13 6 12 193 mm
Awful
May 15° / -1° 12 17 3 150 mm
Bad
June 19° / 1° 7 23 0 101 mm
Ok
July 24° / 3° 3 28 0 35 mm
Perfect
August 24° / 4° 3 28 0 45 mm
Perfect
September 20° / 2° 7 23 0 109 mm
Ok
October 12° / -2° 11 17 2 281 mm
Awful
November 4° / -7° 15 5 13 337 mm
Awful
December -1° / -11° 12 3 21 349 mm
Awful
Temperatures in Snoqualmie Pass in September
Rain in Snoqualmie Pass in September

Recommended Hotels in Snoqualmie Pass

We know that finding the ideal hotel in Snoqualmie Pass can be a hard task...

That’s why we run our special tools and found the best hotels in Snoqualmie Pass. Click on hotel for more details.

Weather in Snoqualmie Pass in September - FAQ

What is the average temperature in Snoqualmie Pass in September?
The average temperature in Snoqualmie Pass in September is 2/20° C.
What is the chance of rain in Snoqualmie Pass in September?
On average, there are 7 rainy days in Snoqualmie Pass during September.
Weather wise, is September a good time to visit Snoqualmie Pass?
The weather in Snoqualmie Pass in September is ok.
Can it snow in Snoqualmie Pass in September?
On average, there are 0 snowy days in Snoqualmie Pass in September.
More about the weather in Snoqualmie Pass