North Cascades National Park (WA)
September
Weather in North Cascades National Park, Washington for September 2027
Your guide to North Cascades National Park weather in September - trends and predictions
In general, the average temperature in North Cascades National Park at the beginning of September is 20.1 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 14.6 °F by the end of September.
North Cascades National Park in September brings notable rainfall, with an average of 16 rainy days and a total precipitation of 83.8 mm.
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Temperatures
Rain 🌧️
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14
Dry days
16
Rainy days
0
Snow days
19°/8°
Temperatures
8 km/h
Avg max wind
63 %
Avg humidity
North Cascades National Park Weather September
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Temperatures trend during September in North Cascades National Park
See the weather trend as well as the moving average line
September weather in North Cascades National Park day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Patchy rain possible | 25° /13° | 1.2 mm | 1 | |
| Sept. 2 |  Moderate or heavy rain shower | 19° /10° | 10.3 mm | 2 | |
| Sept. 3 | Moderate rain at times | 17° /9° | 1.6 mm | 3 | |
| Sept. 4 | Patchy rain possible | 19° /8° | 3.1 mm | 1 | |
| Sept. 5 |  Heavy rain at times | 19° /9° | 2.5 mm | 4 | |
| Sept. 6 |  Overcast | 23° /9° | 0 mm | 6 | |
| Sept. 7 | Patchy rain possible | 19° /10° | 0.7 mm | 3 | |
| Sept. 8 |  Partly cloudy | 24° /9° | 0 mm | 5 | |
| Sept. 9 | Overcast | 25° /12° | 0 mm | 3 | |
| Sept. 10 | Patchy rain possible | 22° /12° | 0.3 mm | 5 | |
| Sept. 11 | Patchy rain possible | 21° /8° | 0.1 mm | 2 | |
| Sept. 12 | Overcast | 25° /11° | 0 mm | 2 | |
| Sept. 13 | Moderate rain at times | 13° /11° | 5.8 mm | 1 | |
| Sept. 14 | Patchy rain possible | 15° /9° | 0.9 mm | 1 | |
| Sept. 15 | Moderate rain at times | 14° /9° | 3.4 mm | 2 | |
| Sept. 16 |  Sunny | 22° /6° | 0 mm | 4 | |
| Sept. 17 |  Cloudy | 25° /8° | 0 mm | 4 | |
| Sept. 18 | Sunny | 23° /9° | 0 mm | 4 | |
| Sept. 19 | Overcast | 25° /8° | 0 mm | 3 | |
| Sept. 20 | Sunny | 25° /8° | 0 mm | 4 | |
| Sept. 21 | Overcast | 22° /10° | 0 mm | 3 | |
| Sept. 22 | Overcast | 17° /9° | 0 mm | 1 | |
| Sept. 23 | Overcast | 15° /6° | 0 mm | 2 | |
| Sept. 24 | Overcast | 20° /6° | 0.5 mm | 1 | |
| Sept. 25 | Moderate or heavy rain shower | 15° /6° | 18 mm | 1 | |
| Sept. 26 | Patchy rain possible | 14° /5° | 1.3 mm | 1 | |
| Sept. 27 | Overcast | 17° /3° | 0 mm | 3 | |
| Sept. 28 | Overcast | 15° /5° | 0.9 mm | 1 | |
| Sept. 29 | Moderate or heavy rain shower | 9° /6° | 30.8 mm | 0 | |
| Sept. 30 | Cloudy | 12° /4° | 1.2 mm | 2 | |
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Important Notice
Our weather forecast for North Cascades National Park 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 North Cascades National Park forecast closer to your planned date for the most up-to-date weather information.
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North Cascades National Park in September - FAQ
What are the expected maximum and minimum temperatures in North Cascades National Park during September?
Enjoy moderate daytime temperatures of up to 19° and cooler nights around 8°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in North Cascades National Park during September?
Moderate rainfall is anticipated in North Cascades National Park during September, with a total of 83.8 mm spread over approximately 16 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in North Cascades National Park during September?
The average wind speed in North Cascades National Park during September is 8 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in North Cascades National Park
Explore the daily rainfall trends and prepare for North Cascades National Parks September weather 💧
Typically, North Cascades National Park has 16 rainy days in September with a total of 83.8 mm of rainfall.
UV exposure in North Cascades National Park during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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Where is North Cascades National Park?Get accurate weather forecasts for North Cascades National Park, located at latitude 48.833 and longitude -121.347. Stay updated with localized weather information tailored for North Cascades National Park.
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