April weather forecast
Winnetka, IL

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Weather in April

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

Temperature

April's arrival coincides with a temperature rise, moving from March's icy 42.3°F (5.7°C) to a cool 52°F (11.1°C). An average low-temperature of 39.7°F (4.3°C) is recorded in the month of April.

Humidity

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

Rainfall

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

Snowfall

Months with snowfall in Winnetka are January through May, October through December. In April, it is snowing for 2.3 days. Throughout April, 2.44" (62mm) of snow is accumulated. Throughout the year, there are 47.6 snowfall days, and 17.8" (452mm) of snow is accumulated.

Daylight

The average length of the day in April is 13h and 23min.
On the first day of the month, sunrise is at 6:32 am and sunset at 7:17 pm. On the last day of April, sunrise is at 5:46 am and sunset at 7:49 pm CDT.

Sunshine

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

UV index

In Winnetka, the average daily maximum UV index in April is 3. A UV Index estimate of 3 to 5 represents a moderate threat to health from unprotected exposure to Sun's UV rays for average individuals.
Note: In April, a daily UV index of 3 turns into the following recommendations:
Make use of precautions - Shielding skin and eyes from injury is a requirement. The most potent solar radiation is around mid-day, so one should minimize exposure to direct sunlight during this period. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days. Beware! Reflection from snow can magnify the Sun's UV radiation nearly twofold.
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Frequently asked questions

What are April temperatures in Winnetka?

The average high-temperature and low-temperature in Winnetka, Illinois, during April are 52°F (11.1°C) and 39.7°F (4.3°C) respectively.

What is the average humidity in April in Winnetka?

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

How much does it rain in Winnetka in April?

In Winnetka, in April, it is raining for 16.5 days, with typically 3.78" (96mm) of accumulated precipitation.

How many days does it snow in April in Winnetka?

In Winnetka, in April, during 2.3 snowfall days, 2.44" (62mm) of snow is typically accumulated.

How many hours of daylight does Winnetka have in April?

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

When are sunrise and sunset in April in Winnetka?

On the first day of April in Winnetka, sunrise is at 6:32 am and sunset at 7:17 pm. On the last day of the month, sunrise is at 5:46 am and sunset at 7:49 pm CDT.

How many hours of sunshine does Winnetka have in April?

The average sunshine duration in April is 7.8h.

What is the UV index intensity in April in Winnetka?

In April, the average daily maximum UV index in Winnetka, Illinois, is 3. A UV Index reading of 3 to 5 represents a moderate health threat from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in April
Winnetka, IL

Average temperature in April - Winnetka, 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
Winnetka, IL

Average pressure in April - Winnetka, 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
Winnetka, IL

Average wind speed in April - Winnetka, 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
Winnetka, IL

Average humidity in April - Winnetka, 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
Winnetka, IL

Average rainfall in April - Winnetka, 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
Winnetka, IL

Average rainfall days in April - Winnetka, 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
Winnetka, IL

Average snowfall in April - Winnetka, 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
Winnetka, IL

Average snowfall days in April - Winnetka, 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
Winnetka, IL

Average daylight in April / Average sunshine in April - Winnetka, IL
  • Average daylight in April: 13h and 2min

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 12min).

  • Average sunshine in April: 7h and 5min

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
Winnetka, IL

Average sunshine days in April - Winnetka, 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
Winnetka, IL

Average UV index in April - Winnetka, 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
Winnetka, IL

Average cloud cover in April - Winnetka, 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
Winnetka, IL

Average visibility in April - Winnetka, 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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Winnetka, Illinois, USA

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