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
April's arrival brings a change in high-temperatures, moving from a cool 53.2°F (11.8°C) in March to an enjoyable 64.4°F (18°C). Vernon experiences a nighttime temperature average of 47.5°F (8.6°C) during April.Humidity
In April, the average relative humidity is 78%.Rainfall
In Vernon, in April, during 14.1 rainfall days, 3.35" (85mm) of precipitation is typically accumulated. In Vernon, Illinois, during the entire year, the rain falls for 145.5 days and collects up to 28.39" (721mm) of precipitation.Snowfall
Months with snowfall in Vernon are January through April, November and December. April is the last month it regularly snows. During 0.3 snowfall days, in April, Vernon aggregates 0.04" (1mm) of snow. In Vernon, during the entire year, snow falls for 17.7 days and aggregates up to 5.91" (150mm) of snow.Daylight
In Vernon, the average length of the day in April is 13h and 14min.On the first day of April, sunrise is at 6:39 am and sunset at 7:20 pm. On the last day of the month, sunrise is at 5:58 am and sunset at 7:48 pm CDT.
Sunshine
In April, the average sunshine is 8.3h.UV index
In April, the average daily maximum UV index is 4. A UV Index reading of 3 to 5 represents a medium health hazard from unsafe exposure to UV radiation for the average person.Note: The UV index of 4 during April translates into the following guidance:
Act with care - Obligation to protect against skin and eye damage is highlighted. UV radiation from the Sun is most dangerous during midday; take precautions and seek shade. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage. Be alert! Nearly double the UV rays from the Sun can be reflected by snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Vernon in April?
What is the average humidity in April?
How many days does it rain in April?
What is the last month it snows?
How many hours of daylight does Vernon have in April?
What time are sunrise and sunset in April?
How long on average sun shines in April?
How high is the UV index in April in Vernon?
Average temperature in April
Vernon, IL
- Average high temperature in April: 64.4°F
The warmest month (with the highest average high temperature) is July (84.7°F).
The month with the lowest average high temperature is January (37°F).
- Average low temperature in April: 47.5°F
The month with the highest average low temperature is July (67.5°F).
The coldest month (with the lowest average low temperature) is January (24.3°F).
Average pressure in April
Vernon, IL
- Average pressure in April: 29.95"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in April
Vernon, IL
- Average wind speed in April: 9.6mph
The windiest months (with the highest average wind speed) are January and February (10mph).
The calmest month (with the lowest average wind speed) is July (5.8mph).
Average humidity in April
Vernon, IL
- Average humidity in April: 78%
The months with the highest relative humidity are May, July and August (80%).
The month with the lowest relative humidity is October (71%).
Average rainfall in April
Vernon, IL
- Average rainfall in April: 3.35"
The wettest month (with the highest rainfall) is June (3.43").
The driest month (with the least rainfall) is February (1.46").
Average rainfall days in April
Vernon, IL
- Average rainfall days in April: 14.1 days
The month with the highest number of rainy days is May (16.7 days).
The month with the least rainy days is January (7.2 days).
Average snowfall in April
Vernon, IL
- Average snowfall in April: 0.04"
The month with the highest snowfall is January (1.77").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in April
Vernon, IL
- Average snowfall days in April: 0.3 days
The month with the highest number of snowfall days is January (5.8 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in April /
Average sunshine in April
Vernon, IL
- Average daylight in April: 13h and 1min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in April: 8h and 2min
The month with the most sunshine is June (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 4h and 30min).
Average sunshine days in April
Vernon, IL
- Average sunshine days in April: 13.8 days
The month with the most sunshine days is October (19.5 days).
The month with the least sunshine days is May (11.5 days).
Average UV index in April
Vernon, 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, November and December (UV index 2).
Average cloud cover in April
Vernon, IL
- Average cloud cover in April: 43
The months with the most cloud cover are January and February (Cloud cover 51).
The months with the least cloud cover are June and August (Cloud cover 28).
Average visibility in April
Vernon, 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).
Vernon, Illinois, USA
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