Contents
- Weather in April
- Frequently asked questions
- Average temperature in April
- Average pressure in April
- Average wind speed in April
- Average humidity in April
- Average rainfall in April
- Average rainfall days in April
- Average snowfall in April
- Average snowfall days in April
- Average daylight in April
- Average sunshine in April
- Average sunshine days in April
- Average UV index in April
- Average cloud cover in April
- Average visibility in April
Weather in April
Temperature
April's arrival coincides with a rise in the average high-temperature, moving from March's chilly 46.9°F (8.3°C) to a moderate 59.2°F (15.1°C). Illinois City records an average low of 42.4°F (5.8°C) throughout the nights in April.Humidity
In Illinois City, Illinois, the average relative humidity in April is 74%.Rainfall
In Illinois City, in April, during 14.3 rainfall days, 2.01" (51mm) of precipitation is typically accumulated. Throughout the year, in Illinois City, there are 128 rainfall days, and 19.29" (490mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through April, October through December. April is the last month it regularly snows. During 1.4 snowfall days, in April, Illinois City aggregates 0.35" (9mm) of snow. Throughout the year, there are 35.4 snowfall days, and 8.35" (212mm) of snow is accumulated.Daylight
The average length of the day in April in Illinois City, Illinois, is 13h and 22min.On the first day of the month, sunrise is at 6:45 am and sunset at 7:29 pm. On the last day of April, in Illinois City, sunrise is at 6:00 am and sunset at 8:00 pm CDT.
Sunshine
In Illinois City, Illinois, the average sunshine in April is 7.9h.UV index
The average daily maximum UV index in April is 4. A UV Index reading of 3 to 5 represents a medium health hazard from exposure to the Sun's UV rays for the ordinary person.Note: The UV index of 4 during April translates into the following guidance:
Take care. Persons with lighter skin might suffer burns in less than 30 minutes. To protect against the Sun's most potent rays, avoid direct exposure around midday. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit. Be vigilant! The reflective nature of snow can increase the Sun's UV radiation nearly twofold.
Frequently asked questions
What are April temperatures in Illinois City?
What is the average humidity in April in Illinois City?
How much does it rain in Illinois City in April?
What is the last month it snows in Illinois City?
What is the average length of the day in April in Illinois City?
What time are sunrise and sunset in April in Illinois City?
How long on average sun shines in April in Illinois City?
What is the UV index reading in April in Illinois City?
Average temperature in April
Illinois City, IL
- Average high temperature in April: 59.2°F
The warmest month (with the highest average high temperature) is July (81.7°F).
The month with the lowest average high temperature is January (28.2°F).
- Average low temperature in April: 42.4°F
The month with the highest average low temperature is July (65.1°F).
The coldest month (with the lowest average low temperature) is January (16.2°F).
Average pressure in April
Illinois City, IL
- Average pressure in April: 29.93"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed in April
Illinois City, IL
- Average wind speed in April: 10.6mph
The windiest month (with the highest average wind speed) is April (10.6mph).
The calmest month (with the lowest average wind speed) is August (6.7mph).
Average humidity in April
Illinois City, IL
- Average humidity in April: 74%
The months with the highest relative humidity are January and July (83%).
The month with the lowest relative humidity is October (71%).
Average rainfall in April
Illinois City, IL
- Average rainfall in April: 2.01"
The wettest month (with the highest rainfall) is May (3.31").
The driest month (with the least rainfall) is December (0.75").
Average rainfall days in April
Illinois City, IL
- Average rainfall days in April: 14.3 days
The month with the highest number of rainy days is June (17 days).
The month with the least rainy days is January (4.2 days).
Average snowfall in April
Illinois City, IL
- Average snowfall in April: 0.35"
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
Illinois City, IL
- Average snowfall days in April: 1.4 days
The month with the highest number of snowfall days is January (10.3 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
Illinois City, IL
- Average daylight in April: 13h and 2min
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 12min).
- Average sunshine in April: 7h and 5min
The month with the most sunshine is July (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 4h and 0min).
Average sunshine days in April
Illinois City, IL
- Average sunshine days in April: 13.4 days
The month with the most sunshine days is November (19.6 days).
The month with the least sunshine days is June (10.8 days).
Average UV index in April
Illinois City, IL
- Average UV index in April: 4
The months with the highest UV index are June and July (UV index 6).
The month with the lowest UV index is January (UV index 1).
Average cloud cover in April
Illinois City, IL
- Average cloud cover in April: 47
The month with the most cloud cover is January (Cloud cover 57).
The month with the least cloud cover is August (Cloud cover 29).
Average visibility in April
Illinois City, 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).
Illinois City, Illinois, USA
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