Overall on the next 14 days there will be 1 days with snow in Snoqualmie Pass and a total of 1.2 cm of snow.
It will be snowy on the following days:
Snoqualmie Pass weather in September 2026
Click on a day for an hourly weather forecast
Saturday
Sep 19
0 mm
23° / 7°
Sunday
Sep 20
0 mm
25° / 9°
Monday
Sep 21
0 mm
20° / 8°
Tuesday
Sep 22
0 mm
15° / 6°
Wednesday
Sep 23
0 mm
14° / 4°
Thursday
Sep 24
0 mm
15° / 4°
Friday
Sep 25
1.2 cm
8° / 3°
Saturday
Sep 26
0.3 mm
17° / 3°
Sunday
Sep 27
0 mm
18° / 1°
Monday
Sep 28
5.3 mm
18° / 7°
Tuesday
Sep 29
4.8 mm
9° / 3°
Wednesday
Sep 30
0 mm
8° / 2°
Thursday
Oct 1
0 mm
18° / 1°
Friday
Oct 2
0 mm
16° / 4°
🌨️ Snowy days in Snoqualmie Pass 2026 (September)
The average weather in Snoqualmie Pass in September
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 2026.
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
20° / 2°
Rainy Days
7
Snowy Days
0
Dry Days
23
Rainfall
109
mm
Sun Hours
10.5
Hrs
Historic average weather for September
Click on a day for an hourly weather forecast
Explore the weather in Snoqualmie Pass in other months
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 | Snoqualmie Pass in January |
| February | 2° / -10° | 12 | 2 | 19 | 331 mm | Awful | Snoqualmie Pass in February |
| March | 4° / -7° | 14 | 3 | 18 | 311 mm | Awful | Snoqualmie Pass in March |
| April | 8° / -4° | 13 | 6 | 12 | 193 mm | Awful | Snoqualmie Pass in April |
| May | 15° / -1° | 12 | 17 | 3 | 150 mm | Bad | Snoqualmie Pass in May |
| June | 19° / 1° | 7 | 23 | 0 | 101 mm | Ok | Snoqualmie Pass in June |
| July | 24° / 3° | 3 | 28 | 0 | 35 mm | Perfect | Snoqualmie Pass in July |
| August | 24° / 4° | 3 | 28 | 0 | 45 mm | Perfect | Snoqualmie Pass in August |
| September | 20° / 2° | 7 | 23 | 0 | 109 mm | Ok | Snoqualmie Pass in September |
| October | 12° / -2° | 11 | 17 | 2 | 281 mm | Awful | Snoqualmie Pass in October |
| November | 4° / -7° | 15 | 5 | 13 | 337 mm | Awful | Snoqualmie Pass in November |
| December | -1° / -11° | 12 | 3 | 21 | 349 mm | Awful | Snoqualmie Pass in December |
Temperatures in Snoqualmie Pass in September
Rain in Snoqualmie Pass in September
Recommended Hotels in Snoqualmie Pass
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