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
The onset of April brings a temperature shift, with the average high-temperature moving from a frosty 47.7°F (8.7°C) in March to a moderate 59.4°F (15.2°C). During the month of April, the temperature in Undercliff falls to an average of 43°F (6.1°C).Humidity
In April, the average relative humidity is 74%.Rainfall
In Undercliff, during April, the rain falls for 17 days and regularly aggregates up to 3.7" (94mm) of precipitation. In Undercliff, during the entire year, the rain falls for 151.3 days and collects up to 30.16" (766mm) of precipitation.Snowfall
Months with snowfall are January through April, October through December. April is the last month it regularly snows in Undercliff. During 1.3 snowfall days, in April, Undercliff aggregates 1.69" (43mm) of snow. In Undercliff, during the entire year, snow falls for 36.7 days and aggregates up to 14.09" (358mm) of snow.Daylight
In Undercliff, Illinois, the average length of the day in April is 13h and 21min.On the first day of the month, sunrise is at 6:39 am and sunset at 7:23 pm. On the last day of April, in Undercliff, sunrise is at 5:55 am and sunset at 7:53 pm CDT.
Sunshine
In Undercliff, Illinois, the average sunshine in April is 7.9h.UV index
In Undercliff, the average daily maximum UV index in April is 3. A UV Index reading of 3 to 5 represents a moderate health risk from exposure to the Sun's UV radiation for ordinary individuals.Note: A maximum daily UV index of 3 during April morphs into the following directions:
Make use of precautions - Shielding skin and eyes from injury is a requirement. Solar radiation is at its peak intensity during midday, so it's advisable to stay indoors or in the shade. Tightly woven clothing, when worn loosely, shields effectively against the Sun. Warning! The reflection from snow can nearly magnify the Sun's UV radiation twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are April temperatures in Undercliff?
What is the average humidity in April in Undercliff?
How many days does it rain in April in Undercliff?
What is the last month it snows in Undercliff?
What is the average length of the day in April in Undercliff?
What time are sunrise and sunset in April in Undercliff?
How many hours of sunshine does Undercliff have in April?
What is the UV index intensity in April in Undercliff?
Average temperature in April
Undercliff, IL
- Average high temperature in April: 59.4°F
The warmest month (with the highest average high temperature) is July (81°F).
The month with the lowest average high temperature is January (29.3°F).
- Average low temperature in April: 43°F
The month with the highest average low temperature is July (64.6°F).
The coldest month (with the lowest average low temperature) is January (17.4°F).
Average pressure in April
Undercliff, IL
- Average pressure in April: 29.94"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in April
Undercliff, 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 (6.5mph).
Average humidity in April
Undercliff, IL
- Average humidity in April: 74%
The month with the highest relative humidity is July (85%).
The month with the lowest relative humidity is October (72%).
Average rainfall in April
Undercliff, IL
- Average rainfall in April: 3.7"
The wettest month (with the highest rainfall) is May (4.41").
The driest months (with the least rainfall) are January and December (1.57").
Average rainfall days in April
Undercliff, IL
- Average rainfall days in April: 17 days
The month with the highest number of rainy days is May (18.4 days).
The month with the least rainy days is February (5.9 days).
Average snowfall in April
Undercliff, IL
- Average snowfall in April: 1.69"
The month with the highest snowfall is February (3.7").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in April
Undercliff, IL
- Average snowfall days in April: 1.3 days
The month with the highest number of snowfall days is January (11.2 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
Undercliff, 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 18min).
- Average sunshine in April: 7h and 5min
The month with the most sunshine is June (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).
Average sunshine days in April
Undercliff, IL
- Average sunshine days in April: 10.8 days
The month with the most sunshine days is November (17.7 days).
The month with the least sunshine days is May (10.7 days).
Average UV index in April
Undercliff, IL
- Average UV index in April: 3
The months with the highest UV index are June and July (UV index 6).
The month with the lowest UV index is January (UV index 1).
Average cloud cover in April
Undercliff, IL
- Average cloud cover in April: 47
The month with the most cloud cover is January (Cloud cover 59).
The months with the least cloud cover are August and September (Cloud cover 32).
Average visibility in April
Undercliff, IL
- Average visibility in April: 6mi
The months with the highest visibility are February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are January, July and August (5mi).
Undercliff, Illinois, USA
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