What is the weather like in Portland vs San Francisco in May?

In May, Portland averages 21°C high / 10°C low with about 50 mm of rain; San Francisco averages 18°C high / 11°C low with about 15 mm.

Portland vs San Francisco in May

Portland and San Francisco are nearly tied in May — 86 vs 88 on SeasonMap's comfort score. Portland is nice, a little rain, clean air; San Francisco is nice, dry, clean air.

Portland vs San Francisco — May climate, side by side

	Portland	San Francisco
Comfort score	86/100 (A)	88/100 (A)
Feels-like high	20°C	17°C
Avg high / low	21° / 10°	18° / 11°
Rainfall	50 mm	15 mm
Rainy days	8	2
Humidity	70%	73%
Air quality (AQI)	34	42

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

Portland vs San Francisco in May — FAQ

Is May better in Portland or San Francisco?: Portland and San Francisco are nearly tied in May — 86 vs 88 on SeasonMap's comfort score. Portland is nice, a little rain, clean air; San Francisco is nice, dry, clean air.
What is the weather like in Portland vs San Francisco in May?: In May, Portland averages 21°C high / 10°C low with about 50 mm of rain; San Francisco averages 18°C high / 11°C low with about 15 mm.