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

Temperature

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

Humidity

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

Rainfall

In April, the rain falls for 16.6 days. Throughout April, 3.7" (94mm) of precipitation is accumulated. Throughout the year, there are 160.2 rainfall days, and 36.97" (939mm) of precipitation is accumulated.

Snowfall

Months with snowfall in Chicago are January through May, November and December. In Chicago, Illinois, during 2.4 snowfall days, 1.61" (41mm) of snow is typically accumulated. In Chicago, during the entire year, snow falls for 40.9 days and aggregates up to 13.9" (353mm) of snow.

Ocean temperature

In April, the average ocean temperature in Chicago, Illinois, is 41°F (5°C).
Note: 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.

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

The average sunshine in April in Chicago is 7.8h.

UV index

The average daily maximum UV index in April is 3. A UV Index value of 3 to 5 symbolizes a moderate health risk from unprotected exposure to Sun's UV rays for average individuals.
Note: In April, the average maximum UV index of 3 translate into the following recommendations:
Take precautions - Protection against sunburn is recommended. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. 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 average humidity in April in Chicago?

In April, the average relative humidity is 77%.

How many days does it rain in April in Chicago?

In Chicago, Illinois, in April, it is raining for 16.6 days, with typically 3.7" (94mm) of accumulated precipitation.

How much does it snow in Chicago in April?

In April, it is snowing for 2.4 days. Throughout April, 1.61" (41mm) of snow is accumulated.

What is the ocean temperature in April in Chicago?

In Chicago, Illinois, in April, the average water temperature is 41°F (5°C). At temperatures below 50°F (10°C), swimming in a suitably protected swimsuit is feasible; otherwise, cold shock and loss of breathing control are imminent. Even a short swim, without thermal protection, at temperatures around 55.4°F (13°C) is not comfortable.

How many hours of daylight does Chicago have in April?

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

When 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 long on average sun shines in April in Chicago?

In April, the average sunshine duration in Chicago, Illinois, is 7.8h.

How high is the UV index in April in Chicago?

In April, the average daily maximum UV index in Chicago, Illinois, is 3. A UV Index estimate of 3 to 5 represents a medium hazard to health from exposure to the Sun's UV radiation.

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"

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

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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: 7.8h

The months with the most sunshine are July and August (Average sunshine: 10.6h).
The month with the least sunshine is January (Average sunshine: 3.7h).

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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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