Chicago
Illinois, USA
Long-term weather forecast
Long-term weather forecast
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April weather forecast and Climate
Chicago, IL

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An aerial view of the city of Chicago in Illinois, on the shores of Lake Michigan, with a superb view of the sandy beach of Oak Street
An aerial view of the city of Chicago in Illinois, on the shores of Lake Michigan, with a superb view of the sandy beach of Oak Street
April is one of the best times to visit Chicago in the warm but wet spring weather. The rain gauge accumulates 3.4" (86.4mm) on an average in the city.
The average temperatures are in the 39°F (3.9°C) to 59°F (15°C) with most of the days above 40°F (4.4°C) and nights above freezing. Spring brings the most unpredictable weather though, and April temperatures vary from a low 20°F (-6.7°C) to a high 80°F (26.7°C).
The last snow usually falls during the month as the sunlight increases to 13 hours.
Tourists flock to the public shores around Lake Michigan even though the waters are cold. Keep an eye on the weather for thunderstorms!
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  • The average high temperature in April: 59.2°F

The warmest month (with the highest average high temperature) is July (84.2°F).
The month with the lowest average high temperature is January (31.5°F).

  • The average low temperature in April: 41.7°F

The month with the highest average low temperature is July (67.5°F).
The coldest month (with the lowest average low temperature) is January (18.2°F).

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  • The average humidity in April: 64.9%

The month with the highest relative humidity is December (75.5%).
The month with the lowest relative humidity is May (64.1%).

  • The average rainfall in April: 3.6"

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

  • The average rainfall days in April: 11.1 days

The month with the highest number of rainy days is May (11.4 days).
The month with the lowest number of rainy days is September (8.2 days).

  • The average snowfall in April: 1"

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

  • The average snowfall days in April: 0.7 days

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

  • The average sea temperature in April: 40.9°F

The best month for swimming (with the highest average sea temperature) is August (73.9°F).
The coldest month (with the lowest average sea temperature) is February (36.9°F).

  • The average daylight in April: 13h

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

  • The average sunshine in April: 7.2h

The month with most sunshine is June (Average sunshine: 10.4h).
The month with least sunshine is December (Average sunshine: 3.4h).

  • The average UV index in April: 6

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

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