Chicago
Illinois, USA
Long term weather forecast
Long term weather forecast

May weather forecast and Climate
Chicago, IL

  • Average high temperature in May: 70.2°F

Warmest month (with highest average high temperature) is July (84.2°F).
Month with lowest average high temperature is January (31.5°F).

  • Average low temperature in May: 51.6°F

Month with highest average low temperature is July (67.5°F).
Coldest month (with lowest average low temperature) is January (18.2°F).

  • Average humidity in May: 64.1%

Month with highest relative humidity is December (75.5%).
Month with lowest relative humidity is May (64.1%).

  • Average rainfall in May: 4.1"

Wettest months (with highest rainfall) are May and June (4.1").
Driest month (with lowest rainfall) is February (1.9").

  • Average rainfall days in May: 11.4 days

Month with highest number of rainy days is May (11.4 days).
Month with lowest number of rainy days is September (8.2 days).

  • Average snowfall in May: 0"

Month with highest snowfall is January (11.5").
Months with lowest snowfall are May, June, July, August and September (0").

  • Average snowfall days in May: 0 days

Month with highest number of snowfall days is January (8.1 days).
Months with lowest number of snowfall days are May, June, July, August and September (0 days).

  • Average sea temperature in May: 43°F

Best month for swimming (with highest average sea temperature) is August (70°F).
Coldest months (with lowest average sea temperature) are February, March and April (37°F).

  • Average daylight in May: 15h

Months with longest days are May, June and July (Average daylight: 15).
Month with shortest days is December (Average daylight: 9).

  • Average sunshine in May: 9.1h

Month with most sunshine is June (Average sunshine: 10.4).
Month with least sunshine is December (Average sunshine: 3.4).

  • Average UV index in May: 7

Months with highest UV index are June and July (UV index 9).
Months with lowest UV index are January and December (UV index 1).

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