April weather forecast and climate
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 average temperature fluctuating between 50.7°F (10.4°C) and 40.6°F (4.8°C).

Temperature

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

Humidity

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

Rainfall

In Chicago, Illinois, in April, it is raining for 16.6 days, with typically 3.7" (94mm) of accumulated precipitation. 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 2.4 snowfall days, 1.61" (41mm) of snow is typically accumulated. Throughout the year, in Chicago, there are 40.9 snowfall days, and 13.9" (353mm) of snow is accumulated.

Ocean temperature

In Chicago, in April, the average water temperature 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 Chicago, the average length of the day is 13.4h.

Sunshine

In Chicago, the average sunshine is 7.8h.

UV index

The average daily maximum UV index in April is 3. A UV Index estimate of 3 to 5 represents a medium vulnerability from the exposure to the Sun's UV radiation for the ordinary person.
Note: The daily maximum UV index of 3 in April interpret into the following advice:
Take precautions - Protection against sunburn is recommended. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. A wide-brim hat offers excellent sun protection for 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 temperature in April in Chicago?

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

What is the average humidity in April in Chicago?

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

How many days does it rain in April in Chicago?

In April, in Chicago, Illinois, the rain falls for 16.6 days. Throughout April, 3.7" (94mm) of precipitation is accumulated.

How much does it snow in Chicago in April?

In Chicago, 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 is 41°F (5°C). 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.

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

In Chicago, Illinois, the average length of the day in April is 13.4h.

How many hours of sunshine does Chicago have in April?

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

What is the UV index reading in April in Chicago?

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

Average temperature in April
Chicago, IL

Average temperature in April - Chicago, IL
  • Average high temperature in April: 10.4°C

The warmest month (with the highest average high temperature) is August (25.3°C).
The month with the lowest average high temperature is January (-1.3°C).

  • Average low temperature in April: 4.8°C

The month with the highest average low temperature is July (19.9°C).
The coldest month (with the lowest average low temperature) is January (-6.3°C).

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Average pressure in April
Chicago, IL

Average pressure in April - Chicago, IL
  • Average pressure in April: 1014.3mbar

The month with the highest atmospheric pressure is January (1019.5mbar).
The month with the lowest atmospheric pressure is June (1013.3mbar).

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Average wind speed in April
Chicago, IL

Average wind speed in April - Chicago, IL
  • Average wind speed in April: 17.9km/h

The windiest month (with the highest average wind speed) is January (20.1km/h).
The calmest month (with the lowest average wind speed) is July (12.4km/h).

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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: 94mm

The wettest month (with the highest rainfall) is June (124mm).
The driest month (with the least rainfall) is December (42mm).

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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: 41mm

The month with the highest snowfall is February (90mm).
Months with the least snowfall are June, July, August, September and October (0mm).

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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).
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: 5°C

The best month for swimming (with the highest average sea temperature) is August (23.3°C).
The coldest month (with the lowest average sea temperature) is February (2.7°C).

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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: 13.4h

The month with the longest days is June (Average daylight: 15.2h).
The month with the shortest days is December (Average daylight: 9.2h).

  • Average sunshine in April: 7.8h

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

Months with the highest UV index are July and August (UV index 6).
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).
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: 9km

Months with the highest visibility are September and October (10km).
Months with the lowest visibility are January, February, March, April, May, June, July, August, November and December (9km).

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