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

In May, San Francisco averages 18°C high / 11°C low with about 15 mm of rain; Seattle averages 19°C high / 10°C low with about 34 mm.

San Francisco vs Seattle in May

San Francisco and Seattle are nearly tied in May — 88 vs 85 on SeasonMap's comfort score. San Francisco is nice, dry, clean air; Seattle is nice, a little rain, clean air.

San Francisco vs Seattle — May climate, side by side

	San Francisco	Seattle
Comfort score	88/100 (A)	85/100 (A)
Feels-like high	17°C	18°C
Avg high / low	18° / 11°	19° / 10°
Rainfall	15 mm	34 mm
Rainy days	2	5
Humidity	73%	74%
Air quality (AQI)	42	44

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

San Francisco vs Seattle in May — FAQ

Is May better in San Francisco or Seattle?: San Francisco and Seattle are nearly tied in May — 88 vs 85 on SeasonMap's comfort score. San Francisco is nice, dry, clean air; Seattle is nice, a little rain, clean air.
What is the weather like in San Francisco vs Seattle in May?: In May, San Francisco averages 18°C high / 11°C low with about 15 mm of rain; Seattle averages 19°C high / 10°C low with about 34 mm.