April weather forecastLake Forest, IL
April
Weather in April
April is a cool spring month in Lake Forest, Illinois, with an average temperature varying between 50.9°F (10.5°C) and 39.7°F (4.3°C).Temperature
As Lake Forest transitions into April, the average high-temperature shows a change, moving from an icy 41.5°F (5.3°C) in March to a fresh 50.9°F (10.5°C). An average low-temperature of 39.7°F (4.3°C) is anticipated throughout the nights during April.Humidity
In April, the average relative humidity is 77%.Rainfall
In Lake Forest, during April, the rain falls for 16.1 days and regularly aggregates up to 3.43" (87mm) of precipitation. Throughout the year, in Lake Forest, there are 154.1 rainfall days, and 30.24" (768mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through April, October through December. April is the last month it regularly snows. During 2.4 snowfall days, in April, Lake Forest aggregates 1.89" (48mm) of snow. Throughout the year, in Lake Forest, there are 42.9 snowfall days, and 13.82" (351mm) of snow is accumulated.Daylight
In April, the average length of the day is 13h and 24min.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, in Lake Forest, Illinois, sunrise is at 5:46 am and sunset at 7:50 pm CDT.
Sunshine
The average sunshine in April in Lake Forest is 7.9h.UV index
In April, the average daily maximum UV index in Lake Forest is 3. A UV Index estimate of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV radiation for the ordinary person.Note: An average UV index of 3 in April transforms into this advice:
Be vigilant - Suggestions to stave off sun damage are provided. Considering the Sun's intensity during midday, it's wise to minimize direct exposure. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly. Take precaution! The reflection from snow can almost double the UV radiation of the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in April
Lake Forest, IL
- Average high temperature in April: 50.9°F
The warmest month (with the highest average high temperature) is July (77.7°F).
The month with the lowest average high temperature is January (28.6°F).
- Average low temperature in April: 39.7°F
The months with the highest average low temperature are July and August (66.7°F).
The coldest month (with the lowest average low temperature) is January (18.9°F).
Average pressure in April
Lake Forest, IL
- Average pressure in April: 29.95"Hg
The month with the highest atmospheric pressure is January (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in April
Lake Forest, IL
- Average wind speed in April: 10.8mph
The windiest month (with the highest average wind speed) is January (11.9mph).
The calmest month (with the lowest average wind speed) is August (7.4mph).
Average humidity in April
Lake Forest, IL
- Average humidity in April: 77%
The months with the highest relative humidity are January and February (82%).
The month with the lowest relative humidity is October (73%).
Average rainfall in April
Lake Forest, IL
- Average rainfall in April: 3.43"
The wettest months (with the highest rainfall) are May and June (3.82").
The driest month (with the least rainfall) is December (1.3").
Average rainfall days in April
Lake Forest, IL
- Average rainfall days in April: 16.1 days
The month with the highest number of rainy days is May (17.7 days).
The month with the least rainy days is February (5.9 days).
Average snowfall in April
Lake Forest, IL
- Average snowfall in April: 1.89"
The month with the highest snowfall is January (4.13").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in April
Lake Forest, IL
- Average snowfall days in April: 2.4 days
The month with the highest number of snowfall days is January (11.9 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in April /
Average sunshine in April
Lake Forest, 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 54min
The month with the most sunshine is August (Average sunshine: 10h and 42min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).
Average sunshine days in April
Lake Forest, IL
- Average sunshine days in April: 10.8 days
The month with the most sunshine days is December (15.3 days).
The month with the least sunshine days is April (10.8 days).
Average UV index in April
Lake Forest, 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
Lake Forest, IL
- Average cloud cover in April: 48
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 27).
Average visibility in April
Lake Forest, 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).
