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

In September, North Cascades National Park averages 11°C high / 1°C low with about 79 mm of rain; Portland averages 24°C high / 14°C low with about 46 mm.

North Cascades National Park vs Portland in September

Portland is the better pick in September — 94 vs 81 on SeasonMap's comfort score. Portland is warm, a little rain, clean air, while North Cascades National Park is cold, a little rain, clean air.

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

	🇺🇸 North Cascades National Park	🇺🇸 Portland
Comfort score	81/100 (A)	94/100 (S)
Feels-like high	8°C	24°C
Avg high / low	11° / 1°	24° / 14°
Rainfall	79 mm	46 mm
Rainy days	10	5
Humidity	75%	67%
Air quality (AQI)	33	33

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

Month by month

North Cascades National Park 🇺🇸 United Statescold, a little rain, clean air · best August81
Portland 🇺🇸 United Stateswarm, a little rain, clean air · best June94

North Cascades National Park vs Portland in September — FAQ

Is September better in North Cascades National Park or Portland?: Portland is the better pick in September — 94 vs 81 on SeasonMap's comfort score. Portland is warm, 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 Portland in September?: In September, North Cascades National Park averages 11°C high / 1°C low with about 79 mm of rain; Portland averages 24°C high / 14°C low with about 46 mm.