January weather forecastSumner, IL
January
Weather in January
January, like December, in Sumner, Illinois, is a wintry winter month, with an average temperature varying between 36.7°F (2.6°C) and 24.4°F (-4.2°C).Temperature
Sumner, Illinois, reaches its lowest average temperatures in January, measuring 36.7°F (2.6°C) at the peak and 24.4°F (-4.2°C) at the lowest.Humidity
The average relative humidity in January is 78%.Rainfall
In Sumner, in January, during 9.5 rainfall days, 2.4" (61mm) of precipitation is typically accumulated. Throughout the year, in Sumner, there are 160.3 rainfall days, and 34.33" (872mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through April, November and December. The month with the most snowfall is January, when snow falls for 6.8 days and typically aggregates up to 1.69" (43mm) of snow.Daylight
In January, the average length of the day in Sumner is 9h and 50min.On the first day of January in Sumner, sunrise is at 7:09 am and sunset at 4:40 pm. On the last day of the month, sunrise is at 6:58 am and sunset at 5:11 pm CST.
Sunshine
The month with the least sunshine in Sumner is January, with an average of 4.4h of sunshine.UV index
The months with the lowest UV index in Sumner are January, February, November and December, with an average maximum UV index of 2. A UV Index of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV rays for average individuals.Note: The maximum daily UV index of 2 during January translates into the following directions:
Babies, children, and those with sensitive skin should always avoid extended periods in the sun. Being exposed to the midday Sun can have harmful effects due to strong UV radiation; always take precautions. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration. Take heed! The reflection of snow can intensify the Sun's UV radiation nearly double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in January
Sumner, IL
- Average high temperature in January: 36.7°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 January: 24.4°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 January
Sumner, IL
- Average pressure in January: 30.16"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 January
Sumner, IL
- Average wind speed in January: 10mph
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 January
Sumner, IL
- Average humidity in January: 78%
The month with the highest relative humidity is July (81%).
The month with the lowest relative humidity is October (70%).
Average rainfall in January
Sumner, IL
- Average rainfall in January: 2.4"
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 January
Sumner, IL
- Average rainfall days in January: 9.5 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 January
Sumner, IL
- Average snowfall in January: 1.69"
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 January
Sumner, IL
- Average snowfall days in January: 6.8 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 January /
Average sunshine in January
Sumner, IL
- Average daylight in January: 9h and 48min
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 January: 4h and 24min
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 January
Sumner, IL
- Average sunshine days in January: 16.1 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 January
Sumner, IL
- Average UV index in January: 2
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 January
Sumner, IL
- Average cloud cover in January: 53
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 January
Sumner, IL
- Average visibility in January: 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).
