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
Rock City sees a rise in temperature during April, with average high-temperatures transitioning from a chilly 43.9°F (6.6°C) in March to a moderate 55.9°F (13.3°C). Rock City registers a consistent average low-temperature of 39.2°F (4°C) during April.Humidity
In April, the average relative humidity is 76%.Rainfall
In Rock City, Illinois, in April, during 14.2 rainfall days, 2.17" (55mm) of precipitation is typically accumulated. Throughout the year, in Rock City, there are 138 rainfall days, and 19.69" (500mm) of precipitation is accumulated.Snowfall
January through April, October through December are months with snowfall. April is the last month it regularly snows in Rock City, Illinois. During 2.1 snowfall days, in April, Rock City aggregates 0.51" (13mm) of snow. Throughout the year, there are 41.8 snowfall days, and 10.43" (265mm) of snow is accumulated.Daylight
In Rock City, the average length of the day in April is 13h and 24min.On the first day of April, sunrise is at 6:38 am and sunset at 7:24 pm. On the last day of the month, sunrise is at 5:53 am and sunset at 7:56 pm CDT.
Sunshine
In Rock City, Illinois, the average sunshine in April is 7.5h.UV index
In Rock City, the average daily maximum UV index in April is 3. A UV Index value of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV rays for average individuals.Note: In April, the average maximum UV index of 3 translates into the following recommendations:
Heed the precautions - Suggestions to avoid sunburn are made. To prevent harmful UV exposure, minimize direct contact with the Sun around midday. Enhance your sun protection with tightly woven, yet airy clothing. Remember to consider! The UV radiation from the Sun can be intensified nearly twice by the reflection of snow.
Frequently asked questions
What are April temperatures in Rock City?
What is the average humidity in April in Rock City?
How many days does it rain in April in Rock City?
What is the last month it snows in Rock City?
What is the average length of the day in April in Rock City?
When is the sunrise / sunset in April in Rock City?
How many hours of sunshine does Rock City have in April?
How high is the UV index in April in Rock City?
Average temperature in April
Rock City, IL
- Average high temperature in April: 55.9°F
The warmest month (with the highest average high temperature) is July (79.7°F).
The month with the lowest average high temperature is January (25.2°F).
- Average low temperature in April: 39.2°F
The month with the highest average low temperature is July (62.8°F).
The coldest month (with the lowest average low temperature) is January (13.1°F).
Average pressure in April
Rock City, IL
- Average pressure in April: 29.95"Hg
The month with the highest atmospheric pressure is January (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in April
Rock City, IL
- Average wind speed in April: 10.3mph
The windiest month (with the highest average wind speed) is April (10.3mph).
The calmest month (with the lowest average wind speed) is August (6.5mph).
Average humidity in April
Rock City, IL
- Average humidity in April: 76%
The month with the highest relative humidity is January (87%).
The month with the lowest relative humidity is October (75%).
Average rainfall in April
Rock City, IL
- Average rainfall in April: 2.17"
The wettest month (with the highest rainfall) is June (2.87").
The driest month (with the least rainfall) is December (0.83").
Average rainfall days in April
Rock City, IL
- Average rainfall days in April: 14.2 days
The month with the highest number of rainy days is May (17.4 days).
The month with the least rainy days is January (4.9 days).
Average snowfall in April
Rock City, IL
- Average snowfall in April: 0.51"
The month with the highest snowfall is January (2.99").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in April
Rock City, IL
- Average snowfall days in April: 2.1 days
The month with the highest number of snowfall days is January (11.3 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
Rock City, IL
- Average daylight in April: 13h and 2min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in April: 7h and 3min
The months with the most sunshine are July and August (Average sunshine: 9h and 42min).
The month with the least sunshine is January (Average sunshine: 3h and 36min).
Average sunshine days in April
Rock City, IL
- Average sunshine days in April: 12.3 days
The month with the most sunshine days is November (17.7 days).
The month with the least sunshine days is June (10.5 days).
Average UV index in April
Rock City, IL
- Average UV index in April: 3
The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in April
Rock City, IL
- Average cloud cover in April: 50
The month with the most cloud cover is January (Cloud cover 63).
The month with the least cloud cover is September (Cloud cover 32).
Average visibility in April
Rock City, IL
- Average visibility in April: 6mi
The months with the highest visibility are March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are January, February, July and August (5mi).
Rock City, Illinois, USA
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