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

In August, Chicago averages 28°C high / 20°C low with about 78 mm of rain; San Francisco averages 20°C high / 14°C low with about 1 mm.

Chicago vs San Francisco in August

San Francisco is the better pick in August — 95 vs 81 on SeasonMap's comfort score. San Francisco is nice, dry, clean air, while Chicago is hot, a little rain.

Chicago vs San Francisco — August climate, side by side

	Chicago	San Francisco
Comfort score	81/100 (A)	95/100 (S)
Feels-like high	31°C	21°C
Avg high / low	28° / 20°	20° / 14°
Rainfall	78 mm	1 mm
Rainy days	8	0
Humidity	74%	76%
Air quality (AQI)	56	35

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

Chicago vs San Francisco in August — FAQ

Is August better in Chicago or San Francisco?: San Francisco is the better pick in August — 95 vs 81 on SeasonMap's comfort score. San Francisco is nice, dry, clean air, while Chicago is hot, a little rain.
What is the weather like in Chicago vs San Francisco in August?: In August, Chicago averages 28°C high / 20°C low with about 78 mm of rain; San Francisco averages 20°C high / 14°C low with about 1 mm.