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
South Jacksonville's transition into April is marked by a rise in the average high-temperature, advancing from a cool 51.4°F (10.8°C) in March to a refreshing 63.3°F (17.4°C). South Jacksonville experiences a consistent average temperature of 46.2°F (7.9°C) throughout the nights in April.Humidity
In South Jacksonville, the average relative humidity in April is 75%.Rainfall
In South Jacksonville, during April, the rain falls for 15.8 days and regularly aggregates up to 3.39" (86mm) of precipitation. In South Jacksonville, during the entire year, the rain falls for 148.2 days and collects up to 29.37" (746mm) of precipitation.Snowfall
Months with snowfall in South Jacksonville are January through April, October through December. April is the last month it regularly snows. During 0.8 snowfall days, in April, South Jacksonville aggregates 0.16" (4mm) of snow. Throughout the year, there are 28.3 snowfall days, and 9.76" (248mm) of snow is accumulated.Daylight
The average length of the day in April is 13h and 17min.On the first day of April, sunrise is at 6:43 am and sunset at 7:25 pm. On the last day of the month, sunrise is at 6:01 am and sunset at 7:54 pm CDT.
Sunshine
The average sunshine in April is 8.4h.UV index
In April, the average daily maximum UV index is 4. A UV Index reading of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for ordinary individuals.Note: The daily high UV index of 4 during April translates into the following recommendations:
Undertake precautions - It is suggested to shield oneself from sunburn. Given the potency of the midday Sun's UV radiation, one should avoid prolonged exposure. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage. Observe! Snow reflection can nearly intensify the Sun's UV radiation twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average April temperature?
What is the average humidity in April?
How much does it rain in April?
What is the last month it snows in South Jacksonville?
What is the average length of the day in April?
What time are sunrise and sunset in April?
How many hours of sunshine does South Jacksonville have in April?
What is the UV index intensity in April?
Average temperature in April
South Jacksonville, IL
- Average high temperature in April: 63.3°F
The warmest month (with the highest average high temperature) is July (83.3°F).
The month with the lowest average high temperature is January (33.4°F).
- Average low temperature in April: 46.2°F
The month with the highest average low temperature is July (66.7°F).
The coldest month (with the lowest average low temperature) is January (21°F).
Average pressure in April
South Jacksonville, IL
- Average pressure in April: 29.93"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in April
South Jacksonville, IL
- Average wind speed in April: 10mph
The windiest month (with the highest average wind speed) is January (10.1mph).
The calmest month (with the lowest average wind speed) is July (6.1mph).
Average humidity in April
South Jacksonville, IL
- Average humidity in April: 75%
The month with the highest relative humidity is July (83%).
The month with the lowest relative humidity is October (71%).
Average rainfall in April
South Jacksonville, IL
- Average rainfall in April: 3.39"
The wettest month (with the highest rainfall) is June (3.58").
The driest month (with the least rainfall) is December (1.54").
Average rainfall days in April
South Jacksonville, IL
- Average rainfall days in April: 15.8 days
The month with the highest number of rainy days is May (18 days).
The months with the least rainy days are January and February (7.1 days).
Average snowfall in April
South Jacksonville, IL
- Average snowfall in April: 0.16"
The month with the highest snowfall is January (3.58").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in April
South Jacksonville, IL
- Average snowfall days in April: 0.8 days
The month with the highest number of snowfall days is January (9.6 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 Jacksonville, IL
- Average daylight in April: 13h and 2min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in April: 8h and 2min
The month with the most sunshine is June (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 4h and 18min).
Average sunshine days in April
South Jacksonville, IL
- Average sunshine days in April: 11.9 days
The month with the most sunshine days is December (18.5 days).
The month with the least sunshine days is June (10.5 days).
Average UV index in April
South Jacksonville, 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
South Jacksonville, IL
- Average cloud cover in April: 43
The month with the most cloud cover is January (Cloud cover 53).
The months with the least cloud cover are June, July, August and September (Cloud cover 29).
Average visibility in April
South Jacksonville, 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).
South Jacksonville, Illinois, USA
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