April weather forecastWinnetka, IL
April
Weather in April
April is a cool spring month in Winnetka, Illinois, with an average temperature fluctuating between 39.7°F (4.3°C) and 52°F (11.1°C).Temperature
Winnetka sees an increase in average high-temperatures during April, moving from an icy 42.3°F (5.7°C) in March to a cool 52°F (11.1°C). Throughout April, the temperature tends to fall to a consistent average low of 39.7°F (4.3°C).Humidity
The average relative humidity in April is 76%.Rainfall
In Winnetka, in April, during 16.5 rainfall days, 3.78" (96mm) of precipitation is typically accumulated. 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 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
In Winnetka, the average length of the day in April is 13h and 23min.On the first day of April, 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.
Sunshine
In Winnetka, the average sunshine in April is 7.8h.UV index
The average daily maximum UV index in April is 3. A UV Index reading of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for the average person.Note: The UV index of 3 during April leads to these advisories:
Act with care - The need to guard against sun damage is communicated. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun. Take to heart! Snow reflection can almost magnify the Sun's UV radiation twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
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).
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).
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).
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%).
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").
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).
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").
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).
Average daylight in April /
Average sunshine in April
Winnetka, IL
- Average daylight in April: 13h and 24min
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 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).
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).
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).
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).
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).
