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
As April begins, there is an increase in the average high-temperature, moving from a frosty 46.8°F (8.2°C) in March to a moderate 59°F (15°C). During the month of April, an average temperature of 42.4°F (5.8°C) is noted during the nights in Rock Island.Humidity
In April, the average relative humidity in Rock Island 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 in Rock Island are January through April, October through December. April is the last month it regularly snows in Rock Island. During 1 snowfall days, in April, Rock Island aggregates 0.79" (20mm) of snow. Throughout the year, there are 35.5 snowfall days, and 12.8" (325mm) of snow is accumulated.Daylight
In April, the average length of the day in Rock Island 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, in Rock Island, Illinois, sunrise is at 5:59 am and sunset at 7:59 pm CDT.
Sunshine
In Rock Island, the average sunshine in April is 7.6h.UV index
In April, the average daily maximum UV index in Rock Island is 3. A UV Index of 3 to 5 symbolizes a moderate health risk from unsafe exposure to UV radiation for the ordinary person.Note: In April, the maximum UV index of 3 transforms into these recommendations:
Prioritize safety - Suggestions to prevent sun damage are offered. UV radiation is strongest from the Sun during midday; protect yourself by staying in shaded areas. Always opt for UVA and UVB-resistant sunglasses on radiant days. Mark this! Snow reflection can nearly double the UV radiation intensity from the Sun.
Frequently asked questions
What are April temperatures in Rock Island?
What is the average humidity in April in Rock Island?
How much does it rain in Rock Island in April?
What is the last month it snows in Rock Island?
What is the average length of the day in April in Rock Island?
When is the sunrise / sunset in April in Rock Island?
How long on average sun shines in April in Rock Island?
What is the UV index intensity in April in Rock Island?
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 2min
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 4min
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).
Rock Island, Illinois, USA
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