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
With the onset of April, Merna's average high-temperature experiences a rise, moving from March's chilly 48.6°F (9.2°C) to a refreshing 60.4°F (15.8°C). Merna records a consistent low-temperature of 44.2°F (6.8°C) during April nights.Humidity
In April, the average relative humidity in Merna is 74%.Rainfall
In Merna, in April, it is raining for 17.4 days, with typically 3.7" (94mm) of accumulated precipitation. In Merna, Illinois, during the entire year, the rain falls for 163.1 days and collects up to 33.62" (854mm) of precipitation.Snowfall
January through April, October through December are months with snowfall. April is the last month it regularly snows in Merna, Illinois. During 1.1 snowfall days, in April, Merna aggregates 0.79" (20mm) of snow. Throughout the year, there are 40.7 snowfall days, and 17.01" (432mm) of snow is accumulated.Daylight
In Merna, the average length of the day in April is 13h and 19min.On the first day of the month, sunrise is at 6:37 am and sunset at 7:20 pm. On the last day of April, in Merna, sunrise is at 5:54 am and sunset at 7:50 pm CDT.
Sunshine
The average sunshine in April in Merna is 7.7h.UV index
The average daily maximum UV index in April in Merna, Illinois, is 4. A UV Index estimate of 3 to 5 represents a moderate health risk from unsafe exposure to UV radiation for ordinary individuals.Note: A typical high UV index of 4 in April suggests the following recommendations:
Be careful. Light complexion individuals might get burns in fewer than 30 minutes. To protect against the Sun's most potent rays, avoid direct exposure around midday. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation. Forewarned is forearmed! The Sun's UV radiation can be almost doubled in intensity by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in Merna in April?
What is the average humidity in April in Merna?
How many days does it rain in April in Merna?
What is the last month it snows in Merna?
How many hours of daylight does Merna have in April?
What time are sunrise and sunset in April in Merna?
How many hours of sunshine does Merna have in April?
What is the UV index reading in April in Merna?
Average temperature in April
Merna, IL
- Average high temperature in April: 60.4°F
The warmest month (with the highest average high temperature) is July (80.8°F).
The month with the lowest average high temperature is January (30.7°F).
- Average low temperature in April: 44.2°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 (18.9°F).
Average pressure in April
Merna, IL
- Average pressure in April: 29.94"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in April
Merna, IL
- Average wind speed in April: 10.9mph
The windiest month (with the highest average wind speed) is January (11.1mph).
The calmest month (with the lowest average wind speed) is August (6.6mph).
Average humidity in April
Merna, IL
- Average humidity in April: 74%
The month with the highest relative humidity is July (86%).
The month with the lowest relative humidity is October (71%).
Average rainfall in April
Merna, IL
- Average rainfall in April: 3.7"
The wettest month (with the highest rainfall) is May (4.57").
The driest month (with the least rainfall) is December (1.93").
Average rainfall days in April
Merna, IL
- Average rainfall days in April: 17.4 days
The month with the highest number of rainy days is May (20.1 days).
The month with the least rainy days is February (6.9 days).
Average snowfall in April
Merna, IL
- Average snowfall in April: 0.79"
The month with the highest snowfall is January (5.04").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in April
Merna, IL
- Average snowfall days in April: 1.1 days
The month with the highest number of snowfall days is January (12.8 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
Merna, IL
- Average daylight in April: 13h and 2min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in April: 7h and 4min
The month with the most sunshine is June (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days in April
Merna, IL
- Average sunshine days in April: 10.6 days
The month with the most sunshine days is November (17.4 days).
The month with the least sunshine days is May (8.4 days).
Average UV index in April
Merna, IL
- Average UV index in April: 4
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, October, November and December (UV index 2).
Average cloud cover in April
Merna, IL
- Average cloud cover in April: 48
The month with the most cloud cover is January (Cloud cover 60).
The months with the least cloud cover are August and September (Cloud cover 33).
Average visibility in April
Merna, 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).
Merna, Illinois, USA
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