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 arrival of April brings a change in Shannon's weather, with average high-temperatures moving from March's frosty 44.2°F (6.8°C) to a mild 56.5°F (13.6°C). Throughout April, the average low-temperature in Shannon dips to an icy 39.9°F (4.4°C).Humidity
In Shannon, the average relative humidity in April is 76%.Rainfall
In April, the rain falls for 14.1 days. Throughout April, 1.85" (47mm) of precipitation is accumulated. In Shannon, during the entire year, the rain falls for 130.8 days and collects up to 17.95" (456mm) of precipitation.Snowfall
January through April, October through December are months with snowfall in Shannon. April is the last month it regularly snows in Shannon, Illinois. During 1.1 snowfall days, in April, Shannon aggregates 0.24" (6mm) of snow. In Shannon, Illinois, during the entire year, snow falls for 39.2 days and aggregates up to 8.62" (219mm) of snow.Daylight
In Shannon, the average length of the day in April is 13h and 23min.On the first day of the month, sunrise is at 6:40 am and sunset at 7:25 pm. On the last day of April, sunrise is at 5:54 am and sunset at 7:57 pm CDT.
Sunshine
In Shannon, the average sunshine in April is 7.5h.UV index
In April, the average daily maximum UV index is 3. A UV Index reading of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for the average person.Note: During April, 3 as the daily maximum UV index converts into the following advice:
Exercise prevention - Precautions against solar damage are endorsed. Being in direct Sun during midday can be harmful due to intense solar radiation; take precautions. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key. Be cautious! The UV radiation from the Sun can be magnified almost twofold by snow reflection.
Frequently asked questions
What are April temperatures in Shannon?
What is the average humidity in April in Shannon?
How much does it rain in Shannon in April?
What is the last month it snows in Shannon?
What is the average length of the day in April in Shannon?
What time are sunrise and sunset in April in Shannon?
How long on average sun shines in April in Shannon?
What is the UV index reading in April in Shannon?
Average temperature in April
Shannon, IL
- Average high temperature in April: 56.5°F
The warmest month (with the highest average high temperature) is July (79.9°F).
The month with the lowest average high temperature is January (25.9°F).
- Average low temperature in April: 39.9°F
The month with the highest average low temperature is July (63.3°F).
The coldest month (with the lowest average low temperature) is January (13.5°F).
Average pressure in April
Shannon, IL
- Average pressure in April: 29.94"Hg
The month with the highest atmospheric pressure is January (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in April
Shannon, IL
- Average wind speed in April: 10.4mph
The windiest month (with the highest average wind speed) is April (10.4mph).
The calmest month (with the lowest average wind speed) is August (6.5mph).
Average humidity in April
Shannon, IL
- Average humidity in April: 76%
The month with the highest relative humidity is January (87%).
The month with the lowest relative humidity is October (75%).
Average rainfall in April
Shannon, IL
- Average rainfall in April: 1.85"
The wettest month (with the highest rainfall) is May (2.76").
The driest months (with the least rainfall) are January and February (0.71").
Average rainfall days in April
Shannon, IL
- Average rainfall days in April: 14.1 days
The month with the highest number of rainy days is May (17.9 days).
The month with the least rainy days is February (4.4 days).
Average snowfall in April
Shannon, IL
- Average snowfall in April: 0.24"
The month with the highest snowfall is January (2.64").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in April
Shannon, IL
- Average snowfall days in April: 1.1 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
Shannon, IL
- Average daylight in April: 13h and 2min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in April: 7h and 3min
The month with the most sunshine is July (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days in April
Shannon, IL
- Average sunshine days in April: 13.9 days
The month with the most sunshine days is November (19.7 days).
The month with the least sunshine days is June (10 days).
Average UV index in April
Shannon, IL
- Average UV index in April: 3
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in April
Shannon, IL
- Average cloud cover in April: 50
The month with the most cloud cover is January (Cloud cover 61).
The month with the least cloud cover is September (Cloud cover 32).
Average visibility in April
Shannon, 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).
Shannon, Illinois, USA
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