April weather forecast
Chicago, IL

The city of Chicago in Illinois on the shores of Lake Michigan, with a superb view of the sandy beach of Oak Street
The city of Chicago in Illinois on the shores of Lake Michigan, with a superb view of the sandy beach of Oak Street

Weather in April

April is a fresh spring month in Chicago, Illinois, with an average temperature varying between 40.6°F (4.8°C) and 50.7°F (10.4°C).

Temperature

In April, the average high-temperature increases from a wintry 41.5°F (5.3°C) in March to a cool 50.7°F (10.4°C). In Chicago, in April, the average low-temperature is 40.6°F (4.8°C).

Humidity

In April, the average relative humidity is 77%.

Rainfall

In April, the rain falls for 16.6 days. Throughout April, 3.7" (94mm) of precipitation is accumulated. In Chicago, during the entire year, the rain falls for 160.2 days and collects up to 36.97" (939mm) of precipitation.

Snowfall

January through May, November and December are months with snowfall. In Chicago, during April, snow falls for 2.4 days and regularly aggregates up to 1.61" (41mm) of snow. In Chicago, during the entire year, snow falls for 40.9 days and aggregates up to 13.9" (353mm) of snow.

Ocean temperature

In Chicago, in April, the average water temperature is 41°F (5°C).
Note: Swimming in 41°F (5°C) is considered dangerous. Unprotected immersion in temperatures below 50°F (10°C) causes quickly maximum intensity cold shock with hyperventilation.

Daylight

In April, the average length of the day in Chicago is 13h and 23min.
On the first day of April, sunrise is at 6:32 am and sunset at 7:15 pm. On the last day of the month, sunrise is at 5:47 am and sunset at 7:47 pm CDT.

Sunshine

In April, the average sunshine is 7.8h.

UV index

In Chicago, the average daily maximum UV index in April is 3. A UV Index reading of 3 to 5 represents a moderate health risk from exposure to the Sun's UV radiation for the ordinary person.
Note: In April, the average maximum UV index of 3 translate into the following recommendations:
Take precautions. Light skin individuals may get burned in less than 30 minutes. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
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FAQ

What is the temperature in April in Chicago?

The average high-temperature, in April, in Chicago, is 50.7°F (10.4°C), while the average low-temperature is 40.6°F (4.8°C).

What is the average humidity in April in Chicago?

In April, the average relative humidity in Chicago is 77%.

How much does it rain in Chicago in April?

In Chicago, Illinois, during April, the rain falls for 16.6 days and regularly aggregates up to 3.7" (94mm) of precipitation.

How much does it snow in Chicago in April?

In Chicago, Illinois, in April, during 2.4 snowfall days, 1.61" (41mm) of snow is typically accumulated.

What is the ocean temperature in April in Chicago?

In April, the average ocean temperature in Chicago, Illinois, is 41°F (5°C). Swimming in 41°F (5°C) is considered life-threatening. Even a few minutes in 55.4°F (13°C) water is uncomfortable, and swimming below 50°F (10°C) may cause total loss of breathing control and cold shock, depending on a person's physique.

What is the average length of the day in April in Chicago?

In Chicago, the average day length in April is 13h and 23min.

What time are sunrise and sunset in April in Chicago?

On the first day of April in Chicago, sunrise is at 6:32 am and sunset at 7:15 pm. On the last day of the month, sunrise is at 5:47 am and sunset at 7:47 pm CDT.

How many hours of sunshine does Chicago have in April?

The average sunshine duration in April in Chicago is 7.8h.

What is the UV index intensity in April in Chicago?

In April, the average daily maximum UV index is 3. A UV Index of 3 to 5 symbolizes a medium health risk from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall days
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in April
Chicago, IL

Average temperature in April - Chicago, IL
  • Average high temperature in April: 50.7°F

The warmest month (with the highest average high temperature) is August (77.5°F).
The month with the lowest average high temperature is January (29.7°F).

  • Average low temperature in April: 40.6°F

The month with the highest average low temperature is July (67.8°F).
The coldest month (with the lowest average low temperature) is January (20.7°F).

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Average pressure in April
Chicago, IL

Average pressure in April - Chicago, IL
  • Average pressure in April: 29.95"Hg

The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).

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Average wind speed in April
Chicago, IL

Average wind speed in April - Chicago, IL
  • Average wind speed in April: 11.1mph

The windiest month (with the highest average wind speed) is January (12.5mph).
The calmest month (with the lowest average wind speed) is July (7.7mph).

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Average humidity in April
Chicago, IL

Average humidity in April - Chicago, IL
  • Average humidity in April: 77%

The month with the highest relative humidity is January (82%).
The month with the lowest relative humidity is October (73%).

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Average rainfall in April
Chicago, IL

Average rainfall in April - Chicago, IL
  • Average rainfall in April: 3.7"

The wettest month (with the highest rainfall) is June (4.88").
The driest month (with the least rainfall) is December (1.65").

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Average rainfall days in April
Chicago, IL

Average rainfall days in April - Chicago, IL
  • Average rainfall days in April: 16.6 days

The month with the highest number of rainy days is July (18.5 days).
The month with the least rainy days is February (5.5 days).

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Average snowfall in April
Chicago, IL

Average snowfall in April - Chicago, IL
  • Average snowfall in April: 1.61"

The month with the highest snowfall is February (3.54").
The months with the least snowfall are June, July, August, September and October (0").

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Average snowfall days in April
Chicago, IL

Average snowfall days in April - Chicago, IL
  • Average snowfall days in April: 2.4 days

The month with the highest number of snowfall days is January (10.6 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average sea temperature in April
Chicago, IL

Average sea temperature in April - Chicago, IL
  • 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).

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Average daylight in April /
Average sunshine in April
Chicago, IL

Average daylight in April / Average sunshine in April - Chicago, IL
  • Average daylight in April: 13h and 23min

The month with the longest days is June (Average daylight: 15h and 11min).
The month with the shortest days is December (Average daylight: 9h and 11min).

  • Average sunshine in April: 7h and 48min

The months with the most sunshine are July and August (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).

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Average sunshine days in April
Chicago, IL

Average sunshine days in April - Chicago, IL
  • Average sunshine days in April: 10.8 days

The month with the most sunshine days is December (15.5 days).
The month with the least sunshine days is July (9.3 days).

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Average UV index in April
Chicago, IL

Average UV index in April - Chicago, IL
  • Average UV index in April: 3

The months with the highest UV index are July and August (UV index 6).
The months with the lowest UV index are January and December (UV index 1).

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Average cloud cover in April
Chicago, IL

Average cloud cover in April - Chicago, IL
  • Average cloud cover in April: 48

The month with the most cloud cover is January (Cloud cover 62).
The months with the least cloud cover are July and August (Cloud cover 27).

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Average visibility in April
Chicago, IL

Average visibility in April - Chicago, IL
  • Average visibility in April: 6mi

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

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