Chicago Weather in May

What's the weather like in Chicago (Illinois) in May 2025?

The climate in Chicago during May can be summarized as mild and a little damp.

May is in the spring in Chicago and is typically the 5th warmest month of the year. Daytime maximum temperatures average around 21°C (70°F), whilst at night 9°C (48°F) is normal.

Chicago weather averages (imperial / metric)
Daytime temperature 21.1°C 69.9°F
Nightly temperature 8.8°C 47.8°F
Average temperature 14.9°C 58.8°F
Daily sunshine 9.7 hrs
Avg rainfall 84 mm 3.3 ins
Rainy days 11 days
Sea temperature 6.9°C 44.4°F
Humidity 65%
Windspeed 17.6kph 11 mph

On average May is the 6th wettest month of the year in Chicago with around 84mm 3.3 inches of rain making it a a little damp time to visit. This rainfall is typically spread over 11 days, although this may vary considerably.

On the flip side this corresponds to an average of 9.7 hours of sunshine per day.

May temperatures in Chicago

Chicago average temperature in May

May rainfall

Chicago average rain in May

May hourly sunshine

Chicago average rain in May

The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Chicago in May 2024.

Other monthly averages

Best places to visit in May

UV index Best time to go?

Beta

Current (hourly) weather 15 day forecast

Chicago weather stats

Chicago weather statistics
Hottest month: July 28.3°C 82.9°F
Driest month: February 38mm 1.5ins
Sunniest month: July 11hrs
Coldest month: January -1.4°C 29.5°F
Wettest month: July 100mm 3.9ins
Map showing location of Chicago (41.85003, -87.65005) Chicago map pin © Google

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