What is the weather like in Portland vs Washington in September?

In September, Portland averages 24°C high / 14°C low with about 46 mm of rain; Washington averages 28°C high / 17°C low with about 108 mm.

Portland vs Washington in September

Portland is the better pick in September — 94 vs 80 on SeasonMap's comfort score. Portland is warm, a little rain, clean air, while Washington is hot, rainy, clean air.

Portland vs Washington — September climate, side by side

	Portland	Washington
Comfort score	94/100 (S)	80/100 (A)
Feels-like high	24°C	30°C
Avg high / low	24° / 14°	28° / 17°
Rainfall	46 mm	108 mm
Rainy days	5	8
Humidity	67%	74%
Air quality (AQI)	33	47

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

Portland vs Washington in September — FAQ

Is September better in Portland or Washington?: Portland is the better pick in September — 94 vs 80 on SeasonMap's comfort score. Portland is warm, a little rain, clean air, while Washington is hot, rainy, clean air.
What is the weather like in Portland vs Washington in September?: In September, Portland averages 24°C high / 14°C low with about 46 mm of rain; Washington averages 28°C high / 17°C low with about 108 mm.