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Snoqualmie Pass (WA)
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Snoqualmie Pass (WA)
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United States weather

Weather in Snoqualmie Pass, Washington for September 2027

Your guide to Snoqualmie Pass weather in September - trends and predictions

    Rain 🌧️

  • Snoqualmie Pass experiences moderate rainfall in September, with an average of 8 rainy days and a total precipitation of 107.4 mm.

    • More

  • Is September a good time to visit Snoqualmie Pass? check out the best time to travel to Snoqualmie Pass page.

  • ✨ Is September a good time to visit Snoqualmie Pass? – Ask the AI Weatherman

Average dry days
22
Dry days
Average rainy days
8
Rainy days
Average snowy days
0
Snow days
Average temperatures
18°/8°
Temperatures
Average wind speed
11 km/h
Avg max wind
Average humidity
69 %
Avg humidity

Snoqualmie Pass Weather September

Move between months or click on a day
August
October
Sun.Mon.Tue.Wed.Thu.Fri.Sat.
1
Mist
20°
2
Moderate rain
23°
3
Thundery outbreaks possible
22°
4
Cloudy
23°
5
Moderate rain
20°
6
Thundery outbreaks possible
21°
7
Moderate rain
15°
8
Mist
18°
9
Moderate rain at times
18°
10
Mist
17°
11
Mist
14°
12
Patchy rain possible
15°
13
Moderate rain
16°
14
Light rain
13°
15
Patchy rain possible
17°
16
Sunny
21°
17
Sunny
24°
18
Mist
19°
19
Sunny
23°
20
Cloudy
21°
21
Light rain
17°
22
Mist
16°
23
Sunny
18°
24
Sunny
20°
25
Light rain
12°
26
Overcast
14°
27
Overcast
18°
28
Overcast
17°
29
Moderate rain
11°
30
Light rain
13°

Temperatures trend during September in Snoqualmie Pass

See the weather trend as well as the moving average line

September weather in Snoqualmie Pass day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
Sept. 1 Mist
Mist
 20° /11° 0.2 mm 4
Sept. 2 Moderate rain
Moderate rain
 23° /11° 11.3 mm 5
Sept. 3 Thundery outbreaks possible
Thundery outbreaks possible
 22° /12° 12.9 mm 5
Sept. 4 Cloudy
Cloudy
 23° /13° 0.4 mm 4
Sept. 5 Moderate rain
Moderate rain
 20° /12° 17 mm 5
Sept. 6 Thundery outbreaks possible
Thundery outbreaks possible
 21° /12° 0 mm 5
Sept. 7 Moderate rain
Moderate rain
 15° /9° 7 mm 2
Sept. 8 Mist
Mist
 18° /9° 0 mm 4
Sept. 9 Moderate rain at times
Moderate rain at times
 18° /10° 9.8 mm 3
Sept. 10 Mist
Mist
 17° /10° 0 mm 2
Sept. 11 Mist
Mist
 14° /8° 0 mm 2
Sept. 12 Patchy rain possible
Patchy rain possible
 15° /9° 1.2 mm 2
Sept. 13 Moderate rain
Moderate rain
 16° /8° 16.8 mm 4
Sept. 14 Light rain
Light rain
 13° /6° 3.9 mm 2
Sept. 15 Patchy rain possible
Patchy rain possible
 17° /6° 1.5 mm 3
Sept. 16 Sunny
Sunny
 21° /9° 0 mm 5
Sept. 17 Sunny
Sunny
 24° /11° 0 mm 5
Sept. 18 Mist
Mist
 19° /8° 0 mm 5
Sept. 19 Sunny
Sunny
 23° /9° 0 mm 5
Sept. 20 Cloudy
Cloudy
 21° /8° 0 mm 4.9
Sept. 21 Light rain
Light rain
 17° /7° 3.9 mm 3
Sept. 22 Mist
Mist
 16° /5° 0 mm 4
Sept. 23 Sunny
Sunny
 18° /7° 0 mm 3
Sept. 24 Sunny
Sunny
 20° /9° 0.3 mm 3
Sept. 25 Light rain
Light rain
 12° /5° 5.8 mm 2
Sept. 26 Overcast
Overcast
 14° /2° 0 mm 4
Sept. 27 Overcast
Overcast
 18° /5° 0 mm 4
Sept. 28 Overcast
Overcast
 17° /7° 0.1 mm 3
Sept. 29 Moderate rain
Moderate rain
 11° /8° 10.5 mm 1
Sept. 30 Light rain
Light rain
 13° /6° 4.6 mm 2
Next
Important Notice
Our weather forecast for Snoqualmie Pass in September is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Snoqualmie Pass forecast closer to your planned date for the most up-to-date weather information.
Change Month
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Snoqualmie Pass in September - FAQ

What are the expected maximum and minimum temperatures in Snoqualmie Pass during September?
Enjoy moderate daytime temperatures of up to 18° and cooler nights around 8°. Ideal for a range of outdoor activities, from hiking to city tours.

How much rainfall should be expected in Snoqualmie Pass during September?
Significant rainfall exceeding 107.4 mm is expected in Snoqualmie Pass during September, occurring over more than 8 days. Preparing for wet conditions is recommended in your planning.

What are the typical wind conditions in Snoqualmie Pass during September?
The average wind speed in Snoqualmie Pass during September is 11 km/h, suggesting breezy to windy conditions, depending on your activities.

September rainfall patterns in Snoqualmie Pass

Explore the daily rainfall trends and prepare for Snoqualmie Passs September weather 💧
Typically, Snoqualmie Pass has 8 rainy days in September with a total of 107.4 mm of rainfall.

UV exposure in Snoqualmie Pass during September

Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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Location coordinates Where is Snoqualmie Pass?

Get accurate weather forecasts for Snoqualmie Pass, located at latitude 47.392 and longitude -121.4. Stay updated with localized weather information tailored for Snoqualmie Pass.

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