April weather forecastBig Rock, IL
April
Weather in April
April is a mild spring month in Big Rock, Illinois, with an average temperature ranging between max 57°F (13.9°C) and min 40.1°F (4.5°C).Temperature
April's arrival coincides with a temperature rise, moving from March's frosty 45.5°F (7.5°C) to a refreshing 57°F (13.9°C). In the month of April, Big Rock experiences an average low-temperature of 40.1°F (4.5°C).Humidity
In Big Rock, the average relative humidity in April is 76%.Rainfall
In Big Rock, during April, the rain falls for 17.3 days and regularly aggregates up to 3.54" (90mm) of precipitation. Throughout the year, there are 156.4 rainfall days, and 30.98" (787mm) of precipitation is accumulated.Snowfall
January through May, October through December are months with snowfall. In April, it is snowing for 1.7 days. Throughout April, 1.42" (36mm) of snow is accumulated. In Big Rock, Illinois, during the entire year, snow falls for 44.6 days and aggregates up to 15.2" (386mm) of snow.Daylight
The average length of the day in April is 13h and 22min.On the first day of the month, sunrise is at 6:35 am and sunset at 7:20 pm. On the last day of April, sunrise is at 5:50 am and sunset at 7:51 pm CDT.
Sunshine
In April, the average sunshine in Big Rock is 7.5h.UV index
In April, the average daily maximum UV index is 3. A UV Index value of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV rays for the ordinary person.Note: An average UV index of 3 in April transforms into this advice:
Guard yourself - Precautionary measures against sun damage are advocated. Solar radiation peaks around mid-day, so it's wise to limit exposure to the Sun at this time. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in April
Big Rock, IL
- Average high temperature in April: 57°F
The warmest month (with the highest average high temperature) is July (80.6°F).
The month with the lowest average high temperature is January (27.9°F).
- Average low temperature in April: 40.1°F
The month with the highest average low temperature is July (63.3°F).
The coldest month (with the lowest average low temperature) is January (15.8°F).
Average pressure in April
Big Rock, IL
- Average pressure in April: 29.95"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in April
Big Rock, IL
- Average wind speed in April: 9.8mph
The windiest months (with the highest average wind speed) are January, February and April (9.8mph).
The calmest month (with the lowest average wind speed) is August (6mph).
Average humidity in April
Big Rock, IL
- Average humidity in April: 76%
The months with the highest relative humidity are January, July and August (84%).
The month with the lowest relative humidity is October (74%).
Average rainfall in April
Big Rock, IL
- Average rainfall in April: 3.54"
The wettest month (with the highest rainfall) is May (4.33").
The driest month (with the least rainfall) is December (1.57").
Average rainfall days in April
Big Rock, IL
- Average rainfall days in April: 17.3 days
The month with the highest number of rainy days is July (18.2 days).
The month with the least rainy days is February (6 days).
Average snowfall in April
Big Rock, IL
- Average snowfall in April: 1.42"
The month with the highest snowfall is January (4.65").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in April
Big Rock, IL
- Average snowfall days in April: 1.7 days
The month with the highest number of snowfall days is January (13.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in April /
Average sunshine in April
Big Rock, IL
- Average daylight in April: 13h and 24min
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 12min).
- Average sunshine in April: 7h and 30min
The month with the most sunshine is August (Average sunshine: 9h and 36min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days in April
Big Rock, IL
- Average sunshine days in April: 10.3 days
The month with the most sunshine days is November (16.4 days).
The month with the least sunshine days is April (10.3 days).
Average UV index in April
Big Rock, IL
- Average UV index in April: 3
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in April
Big Rock, IL
- Average cloud cover in April: 50
The month with the most cloud cover is January (Cloud cover 61).
The months with the least cloud cover are August and September (Cloud cover 34).
Average visibility in April
Big Rock, IL
- Average visibility in April: 6mi
The months with the highest visibility are March, April, May, June, October, November and December (6mi).
The months with the lowest visibility are January, February, July, August and September (5mi).
