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 shows a rise in the average high-temperature, moving from March's fresh 50.5°F (10.3°C) to a refreshing 61.9°F (16.6°C). During the month of April, the temperature falls to an average of 46°F (7.8°C).Humidity
The average relative humidity in April is 74%.Rainfall
In Harristown, during April, the rain falls for 13.6 days and regularly aggregates up to 1.93" (49mm) of precipitation. Throughout the year, there are 130.2 rainfall days, and 16.34" (415mm) of precipitation is accumulated.Snowfall
January through April, November and December are months with snowfall in Harristown. April is the last month it regularly snows. During 0.5 snowfall days, in April, Harristown aggregates 0.04" (1mm) of snow. Throughout the year, there are 23.1 snowfall days, and 5.67" (144mm) of snow is accumulated.Daylight
The average length of the day in April is 13h and 17min.On the first day of the month, sunrise is at 6:38 am and sunset at 7:20 pm. On the last day of April, sunrise is at 5:56 am and sunset at 7:50 pm CDT.
Sunshine
The average sunshine in April is 8.2h.UV index
The average daily maximum UV index in April is 4. A UV Index value of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to UV radiation for the ordinary person.Note: In April, the maximum UV index of 4 translates into these guidelines:
Take necessary precautions - Suggestions to elude sunburn are provided. The Sun's harshest UV rays are around midday; it's wise to seek shade and limit time outdoors. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days. Mark this! Snow reflection can nearly double the UV radiation intensity from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are April temperatures?
What is the average humidity in April?
How much does it rain in April?
What is the last month it snows?
How many hours of daylight does Harristown have in April?
What time are sunrise and sunset in April?
How many hours of sunshine does Harristown have in April?
What is the UV index intensity in April?
Average temperature in April
Harristown, IL
- Average high temperature in April: 61.9°F
The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (32.9°F).
- Average low temperature in April: 46°F
The month with the highest average low temperature is July (65.7°F).
The coldest month (with the lowest average low temperature) is January (21.2°F).
Average pressure in April
Harristown, IL
- Average pressure in April: 29.94"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in April
Harristown, IL
- Average wind speed in April: 10.6mph
The windiest month (with the highest average wind speed) is January (10.7mph).
The calmest months (with the lowest average wind speed) are July and August (6.3mph).
Average humidity in April
Harristown, 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 (70%).
Average rainfall in April
Harristown, IL
- Average rainfall in April: 1.93"
The wettest month (with the highest rainfall) is May (2.01").
The driest months (with the least rainfall) are February and December (0.87").
Average rainfall days in April
Harristown, IL
- Average rainfall days in April: 13.6 days
The month with the highest number of rainy days is May (17 days).
The month with the least rainy days is February (5.8 days).
Average snowfall in April
Harristown, IL
- Average snowfall in April: 0.04"
The month with the highest snowfall is January (1.85").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in April
Harristown, IL
- Average snowfall days in April: 0.5 days
The month with the highest number of snowfall days is January (7.2 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in April /
Average sunshine in April
Harristown, IL
- Average daylight in April: 13h and 2min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in April: 8h and 1min
The month with the most sunshine is June (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 4h and 6min).
Average sunshine days in April
Harristown, IL
- Average sunshine days in April: 14.5 days
The month with the most sunshine days is October (19.8 days).
The month with the least sunshine days is May (11.5 days).
Average UV index in April
Harristown, IL
- Average UV index in April: 4
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in April
Harristown, IL
- Average cloud cover in April: 44
The month with the most cloud cover is January (Cloud cover 56).
The month with the least cloud cover is September (Cloud cover 29).
Average visibility in April
Harristown, 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).
Harristown, Illinois, USA
Weather forecast for your location
2. Allow the app to use your location