April weather forecast
Prospect Heights, IL

Weather in April

April is a fresh spring month in Prospect Heights, Illinois, with temperature in the range of an average high of 54.3°F (12.4°C) and an average low of 40.1°F (4.5°C).

Temperature

In Prospect Heights, Illinois, the average high-temperature rises, from a chilly 43.5°F (6.4°C) in March, to a fresh 54.3°F (12.4°C). In Prospect Heights, in April, the average low-temperature is 40.1°F (4.5°C).

Humidity

The average relative humidity in April is 75%.

Rainfall

In Prospect Heights, during 16 rainfall days, 3.54" (90mm) of precipitation is typically accumulated. In Prospect Heights, during the entire year, the rain falls for 153.3 days and collects up to 30.12" (765mm) of precipitation.

Snowfall

January through May, October through December are months with snowfall. In April, it is snowing for 1.9 days. Throughout April, 2.52" (64mm) of snow is accumulated. Throughout the year, there are 43.6 snowfall days, and 17.95" (456mm) of snow is accumulated.

Daylight

In Prospect Heights, the average length of the day in April is 13.4h.

Sunshine

In Prospect Heights, the average sunshine is 7.5h.

UV index

In Prospect Heights, the average daily maximum UV index is 3. A UV Index of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to the Sun's UV rays for the average person.
Note: The average daily UV index of 3 transform into the following instructions:
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. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
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FAQ

What is the average humidity in April in Prospect Heights?

In Prospect Heights, the average relative humidity in April is 75%.

How much does it rain in Prospect Heights in April?

In Prospect Heights, during April, the rain falls for 16 days and regularly aggregates up to 3.54" (90mm) of precipitation.

How much does it snow in Prospect Heights in April?

In Prospect Heights, during April, snow falls for 1.9 days and regularly aggregates up to 2.52" (64mm) of snow.

What is the average length of the day in April in Prospect Heights?

In Prospect Heights, the average length of the day in April is 13.4h.

How many hours of sunshine does Prospect Heights have in April?

In Prospect Heights, the average sunshine in April is 7.5h.

What is the UV index reading in April in Prospect Heights?

In April, the average daily maximum UV index in Prospect Heights is 3. A UV Index estimate of 3 to 5 represents a medium health risk from unprotected exposure to the UV radiation.

Average temperature in April
Prospect Heights, IL

Average temperature in April - Prospect Heights, IL
  • Average high temperature in April: 54.3°F

The warmest month (with the highest average high temperature) is July (81.1°F).
The month with the lowest average high temperature is January (28.2°F).

  • Average low temperature in April: 40.1°F

The month with the highest average low temperature is July (66.4°F).
The coldest month (with the lowest average low temperature) is January (18°F).

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Average pressure in April
Prospect Heights, IL

Average pressure in April - Prospect Heights, 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
Prospect Heights, IL

Average wind speed in April - Prospect Heights, IL
  • Average wind speed in April: 9.9mph

The windiest month (with the highest average wind speed) is January (10.4mph).
The calmest month (with the lowest average wind speed) is August (6.5mph).

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Average humidity in April
Prospect Heights, IL

Average humidity in April - Prospect Heights, IL
  • Average humidity in April: 75%

Months with the highest relative humidity are January and February (82%).
The month with the lowest relative humidity is October (72%).

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Average rainfall in April
Prospect Heights, IL

Average rainfall in April - Prospect Heights, IL
  • Average rainfall in April: 3.54"

The wettest month (with the highest rainfall) is May (3.9").
The driest month (with the least rainfall) is December (1.46").

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Average rainfall days in April
Prospect Heights, IL

Average rainfall days in April - Prospect Heights, IL
  • Average rainfall days in April: 16 days

The month with the highest number of rainy days is May (18 days).
The month with the least rainy days is February (5.6 days).

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Average snowfall in April
Prospect Heights, IL

Average snowfall in April - Prospect Heights, IL
  • Average snowfall in April: 2.52"

The month with the highest snowfall is January (4.96").
Months with the least snowfall are June, July, August and September (0").

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Average snowfall days in April
Prospect Heights, IL

Average snowfall days in April - Prospect Heights, IL
  • Average snowfall days in April: 1.9 days

The month with the highest number of snowfall days is January (11.8 days).
Months with the least snowfall days are June, July, August and September (0 days).

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Average daylight in April /
Average sunshine in April
Prospect Heights, IL

Average daylight in April / Average sunshine in April - Prospect Heights, 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: 7.5h

The month with the most sunshine is July (Average sunshine: 10.2h).
The month with the least sunshine is January (Average sunshine: 3.7h).

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Average sunshine days in April
Prospect Heights, IL

Average sunshine days in April - Prospect Heights, IL
  • Average sunshine days in April: 10.8 days

The month with the most sunshine days is November (16.3 days).
The month with the least sunshine days is June (10.7 days).

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Average UV index in April
Prospect Heights, IL

Average UV index in April - Prospect Heights, IL
  • Average UV index in April: 3

Months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is December (UV index 1).

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Average cloud cover in April
Prospect Heights, IL

Average cloud cover in April - Prospect Heights, IL
  • Average cloud cover in April: 50

The month with the most cloud cover is January (Cloud cover 61).
The month with the least cloud cover is August (Cloud cover 29).

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Average visibility in April
Prospect Heights, IL

Average visibility in April - Prospect Heights, IL
  • Average visibility in April: 6mi

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

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