What is the weather like in Chicago vs Portland in May?

In May, Chicago averages 20°C high / 10°C low with about 109 mm of rain; Portland averages 21°C high / 10°C low with about 50 mm.

Chicago vs Portland in May

Chicago and Portland are nearly tied in May — 83 vs 86 on SeasonMap's comfort score. Chicago is nice, rainy, muggy air; Portland is nice, a little rain, clean air.

Chicago vs Portland — May climate, side by side

	Chicago	Portland
Comfort score	83/100 (A)	86/100 (A)
Feels-like high	19°C	20°C
Avg high / low	20° / 10°	21° / 10°
Rainfall	109 mm	50 mm
Rainy days	11	8
Humidity	75%	70%
Air quality (AQI)	55	34

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

Chicago vs Portland in May — FAQ

Is May better in Chicago or Portland?: Chicago and Portland are nearly tied in May — 83 vs 86 on SeasonMap's comfort score. Chicago is nice, rainy, muggy air; Portland is nice, a little rain, clean air.
What is the weather like in Chicago vs Portland in May?: In May, Chicago averages 20°C high / 10°C low with about 109 mm of rain; Portland averages 21°C high / 10°C low with about 50 mm.