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
In Sumner, the average high-temperature in April increases from a fresh 53.1°F (11.7°C) in March to an enjoyable 64.4°F (18°C). The average low-temperature of 47.7°F (8.7°C) is witnessed in Sumner during April.Humidity
In April, the average relative humidity is 77%.Rainfall
April is the month with the most rainfall in Sumner. Rain falls for 15.8 days and accumulates 4.69" (119mm) of precipitation.Snowfall
January through April, November and December are months with snowfall in Sumner. April is the last month it regularly snows. During 0.3 snowfall days, in April, Sumner aggregates 0.16" (4mm) of snow. In Sumner, Illinois, during the entire year, snow falls for 21.7 days and aggregates up to 5.87" (149mm) of snow.Daylight
In April, the average length of the day is 13h and 14min.On the first day of the month, sunrise is at 6:34 am and sunset at 7:15 pm. On the last day of April, in Sumner, Illinois, sunrise is at 5:54 am and sunset at 7:43 pm CDT.
Sunshine
The average sunshine in April in Sumner is 8.5h.UV index
The average daily maximum UV index in April is 4. A UV Index of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to Sun's UV rays for ordinary individuals.Note: In April, a regular UV index of 4 translates into these guidelines:
Undertake precautions - It is suggested to shield oneself from sunburn. The Sun is at its harshest during midday; protect yourself by staying in shaded areas and minimizing exposure. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key. Remember! The Sun's UV radiation can be magnified almost twofold by the reflection of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in April in Sumner?
What is the average humidity in April in Sumner?
What is the wettest month in Sumner?
How much does it rain in Sumner in April?
What is the last month it snows in Sumner?
How many hours of daylight does Sumner have in April?
When are sunrise and sunset in April in Sumner?
How many hours of sunshine does Sumner have in April?
How high is the UV index in April in Sumner?
Average temperature in April
Sumner, IL
- Average high temperature in April: 64.4°F
The warmest month (with the highest average high temperature) is July (84°F).
The month with the lowest average high temperature is January (36.7°F).
- Average low temperature in April: 47.7°F
The month with the highest average low temperature is July (67.3°F).
The coldest month (with the lowest average low temperature) is January (24.4°F).
Average pressure in April
Sumner, IL
- Average pressure in April: 29.96"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in April
Sumner, IL
- Average wind speed in April: 9.8mph
The windiest month (with the highest average wind speed) is February (10.1mph).
The calmest month (with the lowest average wind speed) is July (5.8mph).
Average humidity in April
Sumner, IL
- Average humidity in April: 77%
The month with the highest relative humidity is July (81%).
The month with the lowest relative humidity is October (70%).
Average rainfall in April
Sumner, IL
- Average rainfall in April: 4.69"
The wettest month (with the highest rainfall) is April (4.69").
The driest month (with the least rainfall) is September (1.93").
Average rainfall days in April
Sumner, IL
- Average rainfall days in April: 15.8 days
The month with the highest number of rainy days is May (19.6 days).
The month with the least rainy days is February (9.4 days).
Average snowfall in April
Sumner, IL
- Average snowfall in April: 0.16"
The month with the highest snowfall is January (1.69").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in April
Sumner, IL
- Average snowfall days in April: 0.3 days
The month with the highest number of snowfall days is January (6.8 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
Sumner, 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 3min
The month with the most sunshine is June (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 4h and 24min).
Average sunshine days in April
Sumner, IL
- Average sunshine days in April: 11.6 days
The month with the most sunshine days is October (18 days).
The month with the least sunshine days is May (9.4 days).
Average UV index in April
Sumner, 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, November and December (UV index 2).
Average cloud cover in April
Sumner, IL
- Average cloud cover in April: 42
The month with the most cloud cover is January (Cloud cover 53).
The month with the least cloud cover is August (Cloud cover 27).
Average visibility in April
Sumner, 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).
Sumner, Illinois, USA
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