What is the weather like in North Cascades National Park vs Seattle in September?

In September, North Cascades National Park averages 11°C high / 1°C low with about 79 mm of rain; Seattle averages 21°C high / 12°C low with about 36 mm.

North Cascades National Park vs Seattle in September

Seattle is the better pick in September — 89 vs 81 on SeasonMap's comfort score. Seattle is nice, a little rain, clean air, while North Cascades National Park is cold, a little rain, clean air.

North Cascades National Park vs Seattle — September climate, side by side

	🇺🇸 North Cascades National Park	🇺🇸 Seattle
Comfort score	81/100 (A)	89/100 (A)
Feels-like high	8°C	21°C
Avg high / low	11° / 1°	21° / 12°
Rainfall	79 mm	36 mm
Rainy days	10	6
Humidity	75%	75%
Air quality (AQI)	33	40

Monthly climate normals (ERA5 reanalysis). Comfort scores are SeasonMap estimates.

Month by month

North Cascades National Park vs Seattle in September — FAQ

Is September better in North Cascades National Park or Seattle?: Seattle is the better pick in September — 89 vs 81 on SeasonMap's comfort score. Seattle is nice, a little rain, clean air, while North Cascades National Park is cold, a little rain, clean air.
What is the weather like in North Cascades National Park vs Seattle in September?: In September, North Cascades National Park averages 11°C high / 1°C low with about 79 mm of rain; Seattle averages 21°C high / 12°C low with about 36 mm.