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

In May, Chicago averages 20°C high / 10°C low with about 109 mm of rain; San Francisco averages 18°C high / 11°C low with about 15 mm.

Chicago vs San Francisco in May

San Francisco is the better pick in May — 88 vs 83 on SeasonMap's comfort score. San Francisco is nice, dry, clean air, while Chicago is nice, rainy, muggy air.

Chicago vs San Francisco — May climate, side by side

	Chicago	San Francisco
Comfort score	83/100 (A)	88/100 (A)
Feels-like high	19°C	17°C
Avg high / low	20° / 10°	18° / 11°
Rainfall	109 mm	15 mm
Rainy days	11	2
Humidity	75%	73%
Air quality (AQI)	55	42

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

Chicago vs San Francisco in May — FAQ

Is May better in Chicago or San Francisco?: San Francisco is the better pick in May — 88 vs 83 on SeasonMap's comfort score. San Francisco is nice, dry, clean air, while Chicago is nice, rainy, muggy air.
What is the weather like in Chicago vs San Francisco in May?: In May, Chicago averages 20°C high / 10°C low with about 109 mm of rain; San Francisco averages 18°C high / 11°C low with about 15 mm.