Yosemite National Park is definitely worth a visit
Vast forests, blue lakes, towering sequoias, and majestic waterfalls hint at the beauty of Yosemite National Park—a true natural masterpiece.
Snoqualmie Pass Weather in September
Snoqualmie Pass in September sees moderate daytime temperatures of 16°C (61°F) and nighttime lows of 7°C (45°F). Rainfall is fairly high this month at around 121 mm (4.8 in), so pack a rain jacket to stay dry.
Rainfall in Snoqualmie Pass in September
Typically, about 13 days will experience rainfall, with an average of 121 mm (4.8 in) for the month. When showers do arrive, they tend to be on the heavier side. Worth being prepared even if rain days are not that numerous.
Temperature in Snoqualmie Pass in September
Daytime highs in Snoqualmie Pass in September reach 16°C (61°F), with nights around 7°C (45°F). September is a notable month of the summer season. Conditions are often most pleasant around the middle of the day. At 7°C (45°F) overnight, it gets properly cold after dark. On the bright side, cold nights tend to make for excellent sleeping conditions.
Sunshine in Snoqualmie Pass in September
The month enjoys around 220 hours of sunshine, creating mostly sunny days with good weather conditions.Our weather planner can help you find worldwide destinations with pleasant weather during this period. July and August typically offer the best weather for Snoqualmie Pass.
Snoqualmie Pass Temperature in September
Min Temperature
7°C (45°F)
Max Temperature
16°C (61°F)
Chance of Rain
43%
Precipitation
121 mm (4.8 in)
Rainy days
13 days
Humidity
73% *
Sunshine
220 hours *
Percentage Sunshine
59% *
* Data from: Seattle, the United States of America (66 KM, 41 Miles).
Snoqualmie Pass Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Snoqualmie Pass - and find the best time to visit.
Best Places in the United States of America in September
Find out more about the weather in the United States of America and which places have the best travel conditions in this month. See all of the United States of America in September →
perfect weather
pleasant
tolerable
unpleasant
poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
What to Wear in Snoqualmie Pass in September
Pleasant temperatures in September mean you can pack light but flexibel pieces. Think cotton t-shirts, comfortable walking shorts, and one warmer layer for evenings. A light sweater or denim jacket works well. Prepare for significant rainfall with proper waterproof clothing and shoes. And with plenty of sunshine hours, don’t forget sunglasses, sunscreen, and maybe a sun hat.
What To Do in Snoqualmie Pass in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Cycling5/10 -
Walking5/10 -
Camping3/10 -
Outdoor sports9/10
Snoqualmie Pass 3-Day Forecast
More climate data for Snoqualmie Pass
Temperature Rainfall Sunshine Humidity
See the full Snoqualmie Pass climate overview or explore weather in the United States of America.
Popular in September
Where to go in September - average daytime high across popular destinations.
Bucket list
Need travel inspiration? Check out our bucket list articles and be inspired.
Yosemite National Park is definitely worth a visit
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