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

In September, Olympic National Park averages 14°C high / 6°C low with about 148 mm of rain; Seattle averages 21°C high / 12°C low with about 36 mm.

Olympic National Park vs Seattle in September

Seattle is the better pick in September — 89 vs 78 on SeasonMap's comfort score. Seattle is nice, a little rain, clean air, while Olympic National Park is cool, rainy, clean air.

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

	🇺🇸 Olympic National Park	🇺🇸 Seattle
Comfort score	78/100 (B)	89/100 (A)
Feels-like high	12°C	21°C
Avg high / low	14° / 6°	21° / 12°
Rainfall	148 mm	36 mm
Rainy days	11	6
Humidity	75%	75%
Air quality (AQI)	31	40

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

Month by month

Olympic National Park vs Seattle in September — FAQ

Is September better in Olympic National Park or Seattle?: Seattle is the better pick in September — 89 vs 78 on SeasonMap's comfort score. Seattle is nice, a little rain, clean air, while Olympic National Park is cool, rainy, clean air.
What is the weather like in Olympic National Park vs Seattle in September?: In September, Olympic National Park averages 14°C high / 6°C low with about 148 mm of rain; Seattle averages 21°C high / 12°C low with about 36 mm.