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 onset brings a rise in the average high-temperature, moving from a fresh 53.8°F (12.1°C) in March to a refreshing 64.6°F (18.1°C). Throughout April, Walnut Hill registers a consistent average low-temperature of 47.7°F (8.7°C).Humidity
In April, the average relative humidity in Walnut Hill, Illinois, is 78%.Rainfall
The wettest months are April and July, with an average 0.75" (19mm) of rainfall.Snowfall
In Walnut Hill, snow does not fall in April through October.Daylight
In April, the average length of the day is 13h and 14min.On the first day of the month, sunrise is at 6:39 am and sunset at 7:19 pm. On the last day of April, sunrise is at 5:59 am and sunset at 7:47 pm CDT.
Sunshine
The average sunshine in April is 8.3h.UV index
The average daily maximum UV index in April in Walnut Hill is 4. A UV Index reading of 3 to 5 represents a moderate health risk from exposure to the Sun's UV radiation for the average person.Note: The maximum daily UV index of 4 in April converts into the following recommendations:
Put precautions into practice - Ensuring skin and eye safety is a necessity. Solar radiation is at its peak intensity during midday, so it's advisable to stay indoors or in the shade. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance. Note this! The Sun's UV radiation can nearly be doubled by the reflection off snow.
Frequently asked questions
What are April temperatures in Walnut Hill?
What is the average humidity in April in Walnut Hill?
What is the wettest month in Walnut Hill?
How much does it rain in Walnut Hill in April?
When it does not snow in Walnut Hill?
Does it snow in Walnut Hill in April?
What is the average length of the day in April in Walnut Hill?
What time are sunrise and sunset in April in Walnut Hill?
How many hours of sunshine does Walnut Hill have in April?
How high is the UV index in April in Walnut Hill?
Average temperature in April
Walnut Hill, IL
- Average high temperature in April: 64.6°F
The warmest month (with the highest average high temperature) is July (84.9°F).
The month with the lowest average high temperature is January (37.2°F).
- Average low temperature in April: 47.7°F
The month with the highest average low temperature is July (67.6°F).
The coldest month (with the lowest average low temperature) is January (24.3°F).
Average pressure in April
Walnut Hill, 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
Walnut Hill, IL
- Average wind speed in April: 9.6mph
The windiest month (with the highest average wind speed) is February (10mph).
The calmest month (with the lowest average wind speed) is July (5.8mph).
Average humidity in April
Walnut Hill, IL
- Average humidity in April: 78%
The months with the highest relative humidity are May and July (80%).
The month with the lowest relative humidity is October (71%).
Average rainfall in April
Walnut Hill, IL
- Average rainfall in April: 0.75"
The wettest months (with the highest rainfall) are April and July (0.75").
The driest month (with the least rainfall) is September (0.24").
Average rainfall days in April
Walnut Hill, IL
- Average rainfall days in April: 9.7 days
The month with the highest number of rainy days is May (10.1 days).
The month with the least rainy days is January (3.7 days).
Average snowfall in April
Walnut Hill, IL
- Average snowfall in April: 0"
The month with the highest snowfall is January (0.28").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in April
Walnut Hill, IL
- Average snowfall days in April: 0.3 days
The month with the highest number of snowfall days is January (3.8 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
Walnut Hill, 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 months with the most sunshine are June and July (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 4h and 24min).
Average sunshine days in April
Walnut Hill, IL
- Average sunshine days in April: 18.9 days
The months with the most sunshine days are January and December (24.5 days).
The month with the least sunshine days is May (16.8 days).
Average UV index in April
Walnut Hill, IL
- Average UV index in April: 4
The months with the highest UV index are May, 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
Walnut Hill, IL
- Average cloud cover in April: 43
The months with the most cloud cover are January and February (Cloud cover 51).
The month with the least cloud cover is June (Cloud cover 28).
Average visibility in April
Walnut Hill, 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).
Walnut Hill, Illinois, USA
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