Chicago Weather in April

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Chicago, Illinois shifts to spring weather in April. This month usually sees the last frost and snow of the season. April is also Chicago's windiest month.

This page gives detailed information on the typical April weather for Chicago. You can jump directly to data and descriptions for:

The numbers here are historical averages based on climate data gathered at the Chicago O'Hare International Airport, located in the northwestern part of Chicago.

temperature iconTemperature

59 °F April average high 15 °C
39 °F April average low 4 °C

In most years, Chicago averages a daily maximum temperature for April that's between 55 and 63 degrees Fahrenheit (13 to 17 degrees Celsius). The minimum temperature usually falls between 36 and 41 °F (2 to 5 °C).

The days at Chicago continue to warm rapidly during April. By the end of the month, the temperature has climbed around 12 °F (6 °C) above what it was at the start.

14 days 60 °F maximum or above (16 °C)
18 days 40 °F minimum or below (4 °C)

The temperature rises nearly every day during April to over 40 °F (4 °C) in Chicago. The city averages 2 days this month when the thermometer reaches into the 80s °F (over 26 °C). Temperatures above 90 °F (32 °C) are not expected here during April.

The thermometer dips to freezing or below on an average of 6 nights during the month. But April does not normally get as cold as 10 °F (-12 °C).

precipitation iconPrecipitation

3.4 inches total April precipitation 86 millimetres
12 days of rain or snowfall

Half the time, Chicago receives 2 to 4 inches (53 to 110 mm) of precipitation in April. One in four years has drier weather, while another one in four is wetter.

snowfall iconSnow

1.2 inches total April snowfall 3.0 centimetres
1 day with new snow

Every few years, Chicago receives no fresh snow in April. The snowiest Aprils see at least 1.7 inches (4 cm) of fresh snowflakes.

sunshine iconSun

50 % sunshine in April
6 days with clear skies

The sun's rays reach the ground in Chicago during 50 percent of daylight hours on average in April, for a total of 201 hours in the month. Typically on 6 days this month the sky is mainly clear, with at most 30 percent cloud cover.

Sunlight in April at Chicago lasts for 13 hours and 22 minutes a day on average. The shortest day of the month is the 1st with 12 hours and 43 minutes of daylight. By the end of the month, the days have lengthened to 14:00 from sunrise to sunset. These durations can vary by a minute or two from year to year.

humidity iconHumidity

65 % April average humidity

The relative humidity in Chicago during April usually peaks at 77 percent in the morning then drops to 53 percent by mid afternoon.

Local Time12 am3 am6 am9 am12 pm3 pm6 pm9 pm
Humidity % 72 76 77 63 55 53 57 66

wind iconWind

11.9 mph April wind speed average 19.2 kph

April is the windiest month in Chicago.

lightning cloud iconStorms

2 days rainfall of 0.5 inches (13 mm) or more
4 days with thunderstorms in April

April gets an average number of rainstorms. Thunderstorms meanwhile start arriving more often now.

Reference

These weather data are long-term historical averages provided by the National Climatic Data Center of the United States. The temperature and precipitation numbers are 1981-2010 normals while the humidity and thunderstorm statistics are 1961-1990 normals.

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