April weather forecast
Northbrook, IL

Weather in April

April in Northbrook, Illinois, is a fresh spring month, with an average temperature ranging between max 52°F (11.1°C) and min 39.7°F (4.3°C).

Temperature

In April, the average high-temperature increases from a wintry 42.3°F (5.7°C) in March to a fresh 52°F (11.1°C). In April, in Northbrook, the average low-temperature is 39.7°F (4.3°C).

Humidity

In April, the average relative humidity is 76%.

Rainfall

In Northbrook, Illinois, during April, the rain falls for 16.5 days and regularly aggregates up to 3.78" (96mm) of precipitation. In Northbrook, Illinois, during the entire year, the rain falls for 164.7 days and collects up to 35.28" (896mm) of precipitation.

Snowfall

January through May, October through December are months with snowfall in Northbrook. In Northbrook, during April, snow falls for 2.3 days and regularly aggregates up to 2.44" (62mm) of snow. Throughout the year, in Northbrook, there are 47.6 snowfall days, and 17.8" (452mm) of snow is accumulated.

Daylight

In April, the average length of the day in Northbrook is 13h and 23min.
On the first day of the month, sunrise is at 6:33 am and sunset at 7:16 pm. On the last day of April, sunrise is at 5:48 am and sunset at 7:48 pm CDT.

Sunshine

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

UV index

In April, the average daily maximum UV index is 3. A UV Index reading of 3 to 5 represents a medium health hazard from unsafe exposure to UV radiation for the average person.
Note: The daily maximum UV index of 3 in April interpret into the following advice:
Take precautions. Light skin individuals may get burned in less than 30 minutes. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. 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 Northbrook?

In Northbrook, Illinois, in April, the average high-temperature is 52°F (11.1°C), and the average low-temperature is 39.7°F (4.3°C).

What is the average humidity in April in Northbrook?

In Northbrook, Illinois, the average relative humidity in April is 76%.

How many days does it rain in April in Northbrook?

In Northbrook, Illinois, during April, the rain falls for 16.5 days and regularly aggregates up to 3.78" (96mm) of precipitation.

How many days does it snow in April in Northbrook?

In Northbrook, Illinois, during April, snow falls for 2.3 days and regularly aggregates up to 2.44" (62mm) of snow.

How many hours of daylight does Northbrook have in April?

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

When is the sunrise / sunset in April in Northbrook?

On the first day of April in Northbrook, sunrise is at 6:33 am and sunset at 7:16 pm. On the last day of the month, sunrise is at 5:48 am and sunset at 7:48 pm CDT.

How long on average sun shines in April in Northbrook?

The average sunshine duration in April in Northbrook, Illinois, is 7.8h.

How high is the UV index in April in Northbrook?

In Northbrook, Illinois, the average daily maximum UV index in April is 3. A UV Index reading of 3 to 5 represents 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
Northbrook, IL

Average temperature in April - Northbrook, IL
  • Average high temperature in April: 52°F

The warmest month (with the highest average high temperature) is July (79.2°F).
The month with the lowest average high temperature is January (28.8°F).

  • Average low temperature in April: 39.7°F

The month with the highest average low temperature is July (67.1°F).
The coldest month (with the lowest average low temperature) is January (18.9°F).

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Average pressure in April
Northbrook, IL

Average pressure in April - Northbrook, 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
Northbrook, IL

Average wind speed in April - Northbrook, IL
  • Average wind speed in April: 10.6mph

The windiest month (with the highest average wind speed) is January (11.5mph).
The calmest month (with the lowest average wind speed) is August (7.1mph).

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Average humidity in April
Northbrook, IL

Average humidity in April - Northbrook, IL
  • Average humidity in April: 76%

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
Northbrook, IL

Average rainfall in April - Northbrook, IL
  • Average rainfall in April: 3.78"

The wettest months (with the highest rainfall) are May and June (4.57").
The driest month (with the least rainfall) is December (1.65").

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Average rainfall days in April
Northbrook, IL

Average rainfall days in April - Northbrook, IL
  • Average rainfall days in April: 16.5 days

The month with the highest number of rainy days is May (19.1 days).
The month with the least rainy days is February (6.1 days).

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Average snowfall in April
Northbrook, IL

Average snowfall in April - Northbrook, IL
  • Average snowfall in April: 2.44"

The month with the highest snowfall is January (4.84").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in April
Northbrook, IL

Average snowfall days in April - Northbrook, IL
  • Average snowfall days in April: 2.3 days

The month with the highest number of snowfall days is January (13.1 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
Northbrook, IL

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

The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 10min).

  • Average sunshine in April: 7h and 48min

The months with the most sunshine are July and August (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).

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Average sunshine days in April
Northbrook, IL

Average sunshine days in April - Northbrook, IL
  • Average sunshine days in April: 10.2 days

The month with the most sunshine days is November (15.5 days).
The month with the least sunshine days is June (9.2 days).

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Average UV index in April
Northbrook, IL

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

The 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
Northbrook, IL

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

The month with the most cloud cover is January (Cloud cover 61).
The months with the least cloud cover are July and August (Cloud cover 28).

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Average visibility in April
Northbrook, IL

Average visibility in April - Northbrook, 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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