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

In September, North Cascades National Park averages 11°C high / 1°C low with about 79 mm of rain; Olympic National Park averages 14°C high / 6°C low with about 148 mm.

North Cascades National Park vs Olympic National Park in September

North Cascades National Park and Olympic National Park are nearly tied in September — 81 vs 78 on SeasonMap's comfort score. North Cascades National Park is cold, a little rain, clean air; Olympic National Park is cool, rainy, clean air.

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

	🇺🇸 North Cascades National Park	🇺🇸 Olympic National Park
Comfort score	81/100 (A)	78/100 (B)
Feels-like high	8°C	12°C
Avg high / low	11° / 1°	14° / 6°
Rainfall	79 mm	148 mm
Rainy days	10	11
Humidity	75%	75%
Air quality (AQI)	33	31

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
Olympic National Park 🇺🇸 United Statescool, rainy, clean air · best August78

North Cascades National Park vs Olympic National Park in September — FAQ

Is September better in North Cascades National Park or Olympic National Park?: North Cascades National Park and Olympic National Park are nearly tied in September — 81 vs 78 on SeasonMap's comfort score. North Cascades National Park is cold, a little rain, clean air; Olympic National Park is cool, rainy, clean air.
What is the weather like in North Cascades National Park vs Olympic National Park in September?: In September, North Cascades National Park averages 11°C high / 1°C low with about 79 mm of rain; Olympic National Park averages 14°C high / 6°C low with about 148 mm.