April weather forecastRiver Forest, IL
April
Weather in April
April is a cool spring month in River Forest, Illinois, with temperature in the range of an average high of 53.2°F (11.8°C) and an average low of 40.5°F (4.7°C).Temperature
River Forest's April weather shows an increase in high-temperatures, moving from March's frosty 43.2°F (6.2°C) to a fresh 53.2°F (11.8°C). April nights experience a consistent temperature drop to a wintry 40.5°F (4.7°C).Humidity
In River Forest, Illinois, the average relative humidity in April is 75%.Rainfall
In River Forest, in April, it is raining for 16.8 days, with typically 3.62" (92mm) of accumulated precipitation. Throughout the year, there are 157.8 rainfall days, and 33.7" (856mm) of precipitation is accumulated.Snowfall
Months with snowfall in River Forest are January through May, October through December. In River Forest, in April, snow falls for 1.8 days, with typically accumulated 1.97" (50mm) of snow. Throughout the year, in River Forest, there are 40.3 snowfall days, and 16.81" (427mm) of snow is accumulated.Daylight
In April, the average length of the day 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 5:47 am and sunset at 7:49 pm CDT.
Sunshine
In River Forest, the average sunshine in April is 7.8h.UV index
The average daily maximum UV index in April is 3. A UV Index of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV radiation for the ordinary person.Note: The maximum UV index of 3 during April leads to these instructions:
Exercise care. People with light skin might get burns in fewer than 30 minutes. The Sun is most powerful around mid-day, so it's a good practice to reduce direct exposure. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck. Heed this! Snow reflection can almost augment the UV radiation of the sun by double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in April
River Forest, IL
- Average high temperature in April: 53.2°F
The warmest month (with the highest average high temperature) is July (79.7°F).
The month with the lowest average high temperature is January (28.9°F).
- Average low temperature in April: 40.5°F
The month with the highest average low temperature is July (67.5°F).
The coldest month (with the lowest average low temperature) is January (19.4°F).
Average pressure in April
River Forest, 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
River Forest, IL
- Average wind speed in April: 10.3mph
The windiest month (with the highest average wind speed) is January (11.1mph).
The calmest months (with the lowest average wind speed) are July and August (7mph).
Average humidity in April
River Forest, IL
- Average humidity in April: 75%
The month with the highest relative humidity is January (82%).
The month with the lowest relative humidity is October (72%).
Average rainfall in April
River Forest, IL
- Average rainfall in April: 3.62"
The wettest month (with the highest rainfall) is May (4.49").
The driest month (with the least rainfall) is December (1.57").
Average rainfall days in April
River Forest, IL
- Average rainfall days in April: 16.8 days
The month with the highest number of rainy days is May (18.8 days).
The month with the least rainy days is February (5.1 days).
Average snowfall in April
River Forest, IL
- Average snowfall in April: 1.97"
The month with the highest snowfall is February (4.69").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in April
River Forest, IL
- Average snowfall days in April: 1.8 days
The month with the highest number of snowfall days is January (10.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in April /
Average sunshine in April
River 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 48min
The month with the most sunshine is August (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days in April
River Forest, IL
- Average sunshine days in April: 10.2 days
The month with the most sunshine days is December (16.7 days).
The month with the least sunshine days is July (9.9 days).
Average UV index in April
River Forest, 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).
Average cloud cover in April
River Forest, IL
- Average cloud cover in April: 48
The month with the most cloud cover is January (Cloud cover 61).
The month with the least cloud cover is August (Cloud cover 27).
Average visibility in April
River 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).
