April weather forecastRock Island, IL
April
Weather in April
April is a mild spring month in Rock Island, Illinois, with an average temperature varying between 59°F (15°C) and 42.4°F (5.8°C).Temperature
An increase in the average high-temperature marks April, moving from March's chilly 46.8°F (8.2°C) to a mild 59°F (15°C). During April nights, Rock Island witnesses a consistent average temperature of 42.4°F (5.8°C).Humidity
The average relative humidity in April is 74%.Rainfall
In Rock Island, during April, the rain falls for 16.3 days and regularly aggregates up to 3.03" (77mm) of precipitation. Throughout the year, there are 138.1 rainfall days, and 27.32" (694mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through April, October through December. April is the last month it regularly snows. During 1 snowfall days, in April, Rock Island aggregates 0.79" (20mm) of snow. In Rock Island, Illinois, during the entire year, snow falls for 35.5 days and aggregates up to 12.8" (325mm) 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 6:43 am and sunset at 7:28 pm. On the last day of April, sunrise is at 5:59 am and sunset at 7:59 pm CDT.
Sunshine
In April, the average sunshine is 7.6h.UV index
The average daily maximum UV index in April is 3. A UV Index value of 3 to 5 symbolizes a moderate health risk from unprotected exposure to Sun's UV rays for ordinary individuals.Note: The daily high UV index of 3 in April translates into this advice:
Take measures. Individuals with light skin might experience burns in under 30 minutes. The Sun is most powerful around mid-day, so it's a good practice to reduce direct exposure. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage. Foresee this! The reflection from snow can nearly double the intensity of UV radiation from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in April
Rock Island, IL
- Average high temperature in April: 59°F
The warmest month (with the highest average high temperature) is July (81.7°F).
The month with the lowest average high temperature is January (28°F).
- Average low temperature in April: 42.4°F
The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (15.6°F).
Average pressure in April
Rock Island, IL
- Average pressure in April: 29.93"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed in April
Rock Island, IL
- Average wind speed in April: 10.6mph
The windiest month (with the highest average wind speed) is April (10.6mph).
The calmest month (with the lowest average wind speed) is August (6.7mph).
Average humidity in April
Rock Island, IL
- Average humidity in April: 74%
The months with the highest relative humidity are January and July (83%).
The month with the lowest relative humidity is October (71%).
Average rainfall in April
Rock Island, IL
- Average rainfall in April: 3.03"
The wettest month (with the highest rainfall) is May (4.49").
The driest month (with the least rainfall) is February (1.1").
Average rainfall days in April
Rock Island, IL
- Average rainfall days in April: 16.3 days
The month with the highest number of rainy days is May (17.5 days).
The month with the least rainy days is January (4.3 days).
Average snowfall in April
Rock Island, IL
- Average snowfall in April: 0.79"
The month with the highest snowfall is January (3.98").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in April
Rock Island, IL
- Average snowfall days in April: 1 days
The month with the highest number of snowfall days is January (10.9 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 Island, IL
- Average daylight in April: 13h and 24min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in April: 7h and 36min
The month with the most sunshine is July (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).
Average sunshine days in April
Rock Island, IL
- Average sunshine days in April: 12 days
The month with the most sunshine days is November (18.5 days).
The month with the least sunshine days is May (11.4 days).
Average UV index in April
Rock Island, IL
- Average UV index in April: 3
The months with the highest UV index are July and August (UV index 6).
The month with the lowest UV index is January (UV index 1).
Average cloud cover in April
Rock Island, IL
- Average cloud cover in April: 48
The month with the most cloud cover is January (Cloud cover 58).
The month with the least cloud cover is August (Cloud cover 30).
Average visibility in April
Rock Island, 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).
