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
A rise in the average high-temperature is observed during April, moving from a cool 52.3°F (11.3°C) in March to an enjoyable 64°F (17.8°C). April nights are marked by an average temperature drop to a chilly 46.8°F (8.2°C).Humidity
The average relative humidity in April is 76%.Rainfall
In Piasa, in April, it is raining for 14.5 days, with typically 2.91" (74mm) of accumulated precipitation. Throughout the year, there are 141.9 rainfall days, and 27.36" (695mm) of precipitation is accumulated.Snowfall
In Piasa, snow does not fall in April through October.Daylight
In Piasa, the average length of the day in April is 13h and 16min.On the first day of April, sunrise is at 6:43 am and sunset at 7:24 pm. On the last day of the month, sunrise is at 6:02 am and sunset at 7:52 pm CDT.
Sunshine
In Piasa, 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 moderate threat to health from unprotected exposure to Sun's UV rays for ordinary individuals.Note: In April, the maximum UV index of 4 suggests these recommendations:
Be vigilant - Preventing sunburn is recommended. To prevent harmful UV exposure, minimize direct contact with the Sun around midday. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat. Consider carefully! The reflective quality of snow can almost double the intensity of the Sun's UV radiation.
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?
When it does not snow?
Does it snow in April?
What is the average length of the day in April?
What time are sunrise and sunset in April?
How long on average sun shines in April?
What is the UV index reading in April?
Average temperature in April
Piasa, IL
- Average high temperature in April: 64°F
The warmest month (with the highest average high temperature) is July (84.6°F).
The month with the lowest average high temperature is January (35.8°F).
- Average low temperature in April: 46.8°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 (22.6°F).
Average pressure in April
Piasa, 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
Piasa, IL
- Average wind speed in April: 9.5mph
The windiest month (with the highest average wind speed) is January (9.8mph).
The calmest months (with the lowest average wind speed) are July and August (5.8mph).
Average humidity in April
Piasa, IL
- Average humidity in April: 76%
The month with the highest relative humidity is July (81%).
The month with the lowest relative humidity is October (71%).
Average rainfall in April
Piasa, IL
- Average rainfall in April: 2.91"
The wettest month (with the highest rainfall) is June (3.35").
The driest month (with the least rainfall) is January (1.46").
Average rainfall days in April
Piasa, IL
- Average rainfall days in April: 14.5 days
The month with the highest number of rainy days is May (16.7 days).
The month with the least rainy days is January (6.5 days).
Average snowfall in April
Piasa, IL
- Average snowfall in April: 0"
The month with the highest snowfall is February (2.48").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in April
Piasa, IL
- Average snowfall days in April: 0.1 days
The month with the highest number of snowfall days is January (6.2 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
Piasa, 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 30min).
- 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 24min).
Average sunshine days in April
Piasa, IL
- Average sunshine days in April: 14 days
The month with the most sunshine days is January (19.5 days).
The month with the least sunshine days is July (12.1 days).
Average UV index in April
Piasa, IL
- Average UV index in April: 4
The months with the highest UV index are May, 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
Piasa, IL
- Average cloud cover in April: 42
The month with the most cloud cover is January (Cloud cover 52).
The months with the least cloud cover are August and September (Cloud cover 29).
Average visibility in April
Piasa, 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).
Piasa, Illinois, USA
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