April weather forecastCaseyville, KY
April
Weather in April
April in Caseyville, Kentucky, is a comfortable spring month, with an average temperature varying between 48.9°F (9.4°C) and 66.6°F (19.2°C).Temperature
Caseyville experiences a temperature shift with the start of April, with average high-temperatures moving from a mild 55.6°F (13.1°C) in March to an enjoyable 66.6°F (19.2°C). The average nighttime temperature lowers to a frosty 48.9°F (9.4°C) throughout April.Humidity
In April, the average relative humidity is 77%.Rainfall
April is the month with the most rainfall. Rain falls for 13 days and accumulates 2.2" (56mm) of precipitation.Snowfall
January through April, November and December are months with snowfall. April is the last month it regularly snows. During 0.3 snowfall days, in April, Caseyville aggregates 0.04" (1mm) of snow. Throughout the year, there are 15.2 snowfall days, and 3.03" (77mm) of snow is accumulated.Daylight
In April, the average length of the day is 13h and 11min.On the first day of April, sunrise is at 6:36 am and sunset at 7:15 pm. On the last day of the month, sunrise is at 5:57 am and sunset at 7:41 pm CDT.
Sunshine
The average sunshine in April is 8.6h.UV index
The average daily maximum UV index in April is 5. A UV Index of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to Sun's UV rays for ordinary individuals.Note: The maximum UV index of 5 during April translates into these guidelines:
Heed the precautions - Suggestions to avoid sunburn are made. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades. Note this! The Sun's UV radiation can nearly be doubled by the reflection off snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in April
Caseyville, KY
- Average high temperature in April: 66.6°F
The warmest month (with the highest average high temperature) is July (86.2°F).
The month with the lowest average high temperature is January (40.1°F).
- Average low temperature in April: 48.9°F
The month with the highest average low temperature is July (68.4°F).
The coldest month (with the lowest average low temperature) is January (27.5°F).
Average pressure in April
Caseyville, KY
- Average pressure in April: 29.96"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).
Average wind speed in April
Caseyville, KY
- Average wind speed in April: 9.8mph
The windiest month (with the highest average wind speed) is February (9.9mph).
The calmest month (with the lowest average wind speed) is July (5.8mph).
Average humidity in April
Caseyville, KY
- Average humidity in April: 77%
The month with the highest relative humidity is May (80%).
The month with the lowest relative humidity is October (71%).
Average rainfall in April
Caseyville, KY
- Average rainfall in April: 2.2"
The wettest month (with the highest rainfall) is April (2.2").
The driest month (with the least rainfall) is September (0.91").
Average rainfall days in April
Caseyville, KY
- Average rainfall days in April: 13 days
The month with the highest number of rainy days is July (14.8 days).
The month with the least rainy days is January (8.2 days).
Average snowfall in April
Caseyville, KY
- Average snowfall in April: 0.04"
The month with the highest snowfall is January (0.79").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in April
Caseyville, KY
- Average snowfall days in April: 0.3 days
The month with the highest number of snowfall days is January (4.4 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
Caseyville, KY
- Average daylight in April: 13h and 12min
The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in April: 8h and 36min
The month with the most sunshine is June (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 4h and 30min).
Average sunshine days in April
Caseyville, KY
- Average sunshine days in April: 14.9 days
The month with the most sunshine days is October (20.7 days).
The month with the least sunshine days is July (13.1 days).
Average UV index in April
Caseyville, KY
- Average UV index in April: 5
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 and December (UV index 2).
Average cloud cover in April
Caseyville, KY
- Average cloud cover in April: 41
The month with the most cloud cover is January (Cloud cover 52).
The month with the least cloud cover is June (Cloud cover 28).
Average visibility in April
Caseyville, KY
- 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).
