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

In May, Boston averages 20°C high / 10°C low with about 78 mm of rain; San Francisco averages 18°C high / 11°C low with about 15 mm.

Boston vs San Francisco in May

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

Boston vs San Francisco — May climate, side by side

	Boston	San Francisco
Comfort score	86/100 (A)	88/100 (A)
Feels-like high	19°C	17°C
Avg high / low	20° / 10°	18° / 11°
Rainfall	78 mm	15 mm
Rainy days	9	2
Humidity	73%	73%
Air quality (AQI)	43	42

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

Boston vs San Francisco in May — FAQ

Is May better in Boston or San Francisco?: Boston and San Francisco are nearly tied in May — 86 vs 88 on SeasonMap's comfort score. Boston is nice, a little rain, clean air; San Francisco is nice, dry, clean air.
What is the weather like in Boston vs San Francisco in May?: In May, Boston averages 20°C high / 10°C low with about 78 mm of rain; San Francisco averages 18°C high / 11°C low with about 15 mm.