April weather forecastSouth Wilmington, IL
April
Weather in April
April in South Wilmington, Illinois, is a mild spring month, with temperature in the range of an average high of 58.8°F (14.9°C) and an average low of 42.6°F (5.9°C).Temperature
South Wilmington's weather shows a temperature rise with the arrival of April, moving from a frosty 47.5°F (8.6°C) in March to a moderate 58.8°F (14.9°C). In the month of April, South Wilmington witnesses a consistent average low-temperature of 42.6°F (5.9°C).Humidity
In South Wilmington, the average relative humidity in April is 74%.Rainfall
In South Wilmington, in April, it is raining for 14.3 days, with typically 2.28" (58mm) of accumulated precipitation. In South Wilmington, during the entire year, the rain falls for 140.4 days and collects up to 21.5" (546mm) of precipitation.Snowfall
Months with snowfall in South Wilmington are January through April, October through December. April is the last month it regularly snows. During 1.3 snowfall days, in April, South Wilmington aggregates 1.3" (33mm) of snow. Throughout the year, there are 38.1 snowfall days, and 9.13" (232mm) of snow is accumulated.Daylight
The average length of the day in April is 13h and 21min.On the first day of the month, sunrise is at 6:34 am and sunset at 7:18 pm. On the last day of April, sunrise is at 5:50 am and sunset at 7:49 pm CDT.
Sunshine
The average sunshine in April in South Wilmington is 7.8h.UV index
In South Wilmington, the average daily maximum UV index in April is 4. A UV Index estimate of 3 to 5 represents a moderate threat to health from unprotected exposure to Sun's UV rays for the average person.Note: The maximum UV index of 4 during April leads to these instructions:
Guard yourself - Avoiding sunburn is suggested. The Sun is at its harshest during midday; protect yourself by staying in shaded areas and minimizing exposure. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage. Beware! Reflection from snow can magnify the Sun's UV radiation nearly twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in April
South Wilmington, IL
- Average high temperature in April: 58.8°F
The warmest month (with the highest average high temperature) is July (81.1°F).
The month with the lowest average high temperature is January (29.8°F).
- Average low temperature in April: 42.6°F
The month with the highest average low temperature is July (64.4°F).
The coldest month (with the lowest average low temperature) is January (18°F).
Average pressure in April
South Wilmington, IL
- Average pressure in April: 29.95"Hg
The month with the highest atmospheric pressure is January (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in April
South Wilmington, IL
- Average wind speed in April: 10.1mph
The windiest months (with the highest average wind speed) are January and April (10.1mph).
The calmest month (with the lowest average wind speed) is August (6mph).
Average humidity in April
South Wilmington, IL
- Average humidity in April: 74%
The month with the highest relative humidity is July (84%).
The month with the lowest relative humidity is October (72%).
Average rainfall in April
South Wilmington, IL
- Average rainfall in April: 2.28"
The wettest month (with the highest rainfall) is May (2.91").
The driest month (with the least rainfall) is February (0.98").
Average rainfall days in April
South Wilmington, IL
- Average rainfall days in April: 14.3 days
The month with the highest number of rainy days is July (17.3 days).
The month with the least rainy days is February (5.1 days).
Average snowfall in April
South Wilmington, IL
- Average snowfall in April: 1.3"
The month with the highest snowfall is February (2.52").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in April
South Wilmington, IL
- Average snowfall days in April: 1.3 days
The month with the highest number of snowfall days is January (11.5 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
South Wilmington, IL
- Average daylight in April: 13h and 18min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in April: 7h and 48min
The month with the most sunshine is June (Average sunshine: 9h and 54min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).
Average sunshine days in April
South Wilmington, IL
- Average sunshine days in April: 12.2 days
The month with the most sunshine days is November (19.3 days).
The month with the least sunshine days is July (9.5 days).
Average UV index in April
South Wilmington, IL
- Average UV index in April: 4
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in April
South Wilmington, IL
- Average cloud cover in April: 48
The month with the most cloud cover is January (Cloud cover 59).
The months with the least cloud cover are August and September (Cloud cover 33).
Average visibility in April
South Wilmington, IL
- Average visibility in April: 6mi
The months with the highest visibility are January, February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are July and August (5mi).
