April weather forecast
Naperville, IL

A covered bridge over a river along the famous Naperville Riverwalk in Naperville, Illinois
A covered bridge over a river along the famous Naperville Riverwalk in Naperville, Illinois

Weather in April

April in Naperville, Illinois, is a moderate spring month, with temperature in the range of an average low of 40.5°F (4.7°C) and an average high of 56.8°F (13.8°C).

Temperature

In April, the average high-temperature rises from a frosty 45.1°F (7.3°C) in March to a mild 56.8°F (13.8°C). In April, the average low-temperature is 40.5°F (4.7°C).

Humidity

The average relative humidity in April in Naperville is 75%.

Rainfall

In April, in Naperville, Illinois, the rain falls for 13.6 days. Throughout April, 1.69" (43mm) of precipitation is accumulated. In Naperville, Illinois, during the entire year, the rain falls for 132.2 days and collects up to 16.22" (412mm) of precipitation.

Snowfall

January through April, October through December are months with snowfall in Naperville. April is the last month it regularly snows. During 2 snowfall days, Naperville aggregates 1.26" (32mm) of snow. In Naperville, during the entire year, snow falls for 38.7 days and aggregates up to 6.93" (176mm) of snow.

Daylight

In Naperville, the average length of the day in April is 13h and 22min.
On the first day of the month, sunrise is at 6:34 am and sunset at 7:17 pm. On the last day of April, in Naperville, sunrise is at 5:49 am and sunset at 7:49 pm CDT.

Sunshine

In April, the average sunshine in Naperville, Illinois, is 7.6h.

UV index

In Naperville, the average daily maximum UV index in April is 3. A UV Index reading of 3 to 5 represents a moderate health risk from unsafe exposure to UV radiation for the ordinary person.
Note: In April, the average maximum UV index of 3 translate into the following recommendations:
Take precautions - Protection against sun damage is advised. 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. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
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FAQ

What is the temperature in April in Naperville?

The average high-temperature, in April, in Naperville, Illinois, is 56.8°F (13.8°C), while the average low-temperature is 40.5°F (4.7°C).

What is the average humidity in April in Naperville?

The average relative humidity in April in Naperville is 75%.

How many days does it rain in April in Naperville?

In Naperville, Illinois, in April, it is raining for 13.6 days, with typically 1.69" (43mm) of accumulated precipitation.

What is the last month it snows in Naperville?

April is the last month it regularly snows. During 2 snowfall days, in April, Naperville aggregates 1.26" (32mm) of snow.

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

In Naperville, Illinois, the average day length in April is 13h and 22min.

When are sunrise and sunset in April in Naperville?

On the first day of April, sunrise is at 6:34 am and sunset at 7:17 pm. On the last day of the month, sunrise is at 5:49 am and sunset at 7:49 pm CDT.

How many hours of sunshine does Naperville have in April?

In Naperville, the average sunshine duration in April is 7.6h.

What is the UV index reading in April in Naperville?

In Naperville, Illinois, the average daily maximum UV index in April is 3. A UV Index value of 3 to 5 symbolizes a medium health risk from exposure to the Sun's UV radiation.
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
Naperville, IL

Average temperature in April - Naperville, IL
  • Average high temperature in April: 56.8°F

The warmest month (with the highest average high temperature) is July (81.7°F).
The month with the lowest average high temperature is January (28.4°F).

  • Average low temperature in April: 40.5°F

The month with the highest average low temperature is July (65.1°F).
The coldest month (with the lowest average low temperature) is January (17.1°F).

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Average pressure in April
Naperville, IL

Average pressure in April - Naperville, 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
Naperville, IL

Average wind speed in April - Naperville, IL
  • Average wind speed in April: 9.6mph

The windiest month (with the highest average wind speed) is January (9.7mph).
The calmest month (with the lowest average wind speed) is August (6mph).

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Average humidity in April
Naperville, IL

Average humidity in April - Naperville, IL
  • Average humidity in April: 75%

The months with the highest relative humidity are January and February (83%).
The month with the lowest relative humidity is October (73%).

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Average rainfall in April
Naperville, IL

Average rainfall in April - Naperville, IL
  • Average rainfall in April: 1.69"

The wettest month (with the highest rainfall) is May (2.09").
The driest month (with the least rainfall) is December (0.71").

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Average rainfall days in April
Naperville, IL

Average rainfall days in April - Naperville, IL
  • Average rainfall days in April: 13.6 days

The month with the highest number of rainy days is July (17.3 days).
The month with the least rainy days is February (4.4 days).

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Average snowfall in April
Naperville, IL

Average snowfall in April - Naperville, IL
  • Average snowfall in April: 1.26"

The month with the highest snowfall is January (1.85").
The months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days in April
Naperville, IL

Average snowfall days in April - Naperville, IL
  • Average snowfall days in April: 2 days

The month with the highest number of snowfall days is January (11.1 days).
The 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
Naperville, IL

Average daylight in April / Average sunshine in April - Naperville, IL
  • Average daylight in April: 13h and 22min

The month with the longest days is June (Average daylight: 15h and 10min).
The month with the shortest days is December (Average daylight: 9h and 13min).

  • Average sunshine in April: 7h and 36min

The months with the most sunshine are July and August (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).

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Average sunshine days in April
Naperville, IL

Average sunshine days in April - Naperville, IL
  • Average sunshine days in April: 12.8 days

The month with the most sunshine days is November (19.6 days).
The month with the least sunshine days is July (10.2 days).

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Average UV index in April
Naperville, IL

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

The months with the highest UV index are June, 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
Naperville, IL

Average cloud cover in April - Naperville, IL
  • Average cloud cover in April: 49

The month with the most cloud cover is January (Cloud cover 60).
The months with the least cloud cover are August and September (Cloud cover 31).

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Average visibility in April
Naperville, IL

Average visibility in April - Naperville, 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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