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

In September, Olympic National Park averages 14°C high / 6°C low with about 148 mm of rain; Portland averages 24°C high / 14°C low with about 46 mm.

Olympic National Park vs Portland in September

Portland is the better pick in September — 94 vs 78 on SeasonMap's comfort score. Portland is warm, a little rain, clean air, while Olympic National Park is cool, rainy, clean air.

Olympic National Park vs Portland — September climate, side by side

	🇺🇸 Olympic National Park	🇺🇸 Portland
Comfort score	78/100 (B)	94/100 (S)
Feels-like high	12°C	24°C
Avg high / low	14° / 6°	24° / 14°
Rainfall	148 mm	46 mm
Rainy days	11	5
Humidity	75%	67%
Air quality (AQI)	31	33

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

Month by month

Olympic National Park vs Portland in September — FAQ

Is September better in Olympic National Park or Portland?: Portland is the better pick in September — 94 vs 78 on SeasonMap's comfort score. Portland is warm, a little rain, clean air, while Olympic National Park is cool, rainy, clean air.
What is the weather like in Olympic National Park vs Portland in September?: In September, Olympic National Park averages 14°C high / 6°C low with about 148 mm of rain; Portland averages 24°C high / 14°C low with about 46 mm.