Contents
- Weather in January
- Frequently asked questions
- Average temperature in January
- Average pressure in January
- Average wind speed in January
- Average humidity in January
- Average rainfall in January
- Average rainfall days in January
- Average snowfall in January
- Average snowfall days in January
- Average daylight in January
- Average sunshine in January
- Average sunshine days in January
- Average UV index in January
- Average cloud cover in January
- Average visibility in January
Weather in January
Temperature
In South Wilmington, the month of January registers the lowest temperatures, averaging 29.8°F (-1.2°C) at the peak and 18°F (-7.8°C) at the lowest.Humidity
In January, the average relative humidity in South Wilmington, Illinois, is 82%.Rainfall
In January, in South Wilmington, Illinois, the rain falls for 5.3 days. Throughout January, 1.06" (27mm) of precipitation is accumulated. In South Wilmington, Illinois, during the entire year, the rain falls for 140.4 days and collects up to 21.5" (546mm) of precipitation.Snowfall
January through April, October through December are months with snowfall. In January, it is snowing for 11.5 days. Throughout January, 1.89" (48mm) of snow is accumulated. Throughout the year, there are 38.1 snowfall days, and 9.13" (232mm) of snow is accumulated.Daylight
In South Wilmington, the average length of the day in January is 9h and 37min.On the first day of January, sunrise is at 7:18 am and sunset at 4:34 pm. On the last day of the month, sunrise is at 7:05 am and sunset at 5:07 pm CST.
Sunshine
The month with the least sunshine is January, with an average of 3.9h of sunshine.UV index
The months with the lowest UV index are January and December, with an average maximum UV index of 1. A UV Index reading of 2, and below, represents a minimal health vulnerability from unsafe exposure to UV radiation for the ordinary person.Note: In January, the maximum UV index of 1 translates into these guidelines:
Though extended exposure to the sun typically does not concern most people, it is crucial to always shield children, infants, and those with sensitive skin. The Sun is at its harshest during midday; protect yourself by staying in shaded areas and minimizing exposure. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck. Bear in mind! The Sun's UV radiation can nearly double in intensity due to the reflective quality of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the coldest month in South Wilmington?
How cold is it in South Wilmington in January?
What is the average humidity in January in South Wilmington?
How many days does it rain in January in South Wilmington?
How many days does it snow in January in South Wilmington?
How many hours of daylight does South Wilmington have in January?
When are sunrise and sunset in January in South Wilmington?
What is the month with the least sunshine in South Wilmington?
How many hours of sunshine does South Wilmington have in January?
What are the months with the lowest UV index in South Wilmington?
How high is the UV index in January in South Wilmington?
Average temperature in January
South Wilmington, IL
- Average high temperature in January: 29.8°F
The warmest month (with the highest average high temperature) is July (81.1°F).
The month with the lowest average high temperature is January (29.8°F).
- Average low temperature in January: 18°F
The month with the highest average low temperature is July (64.4°F).
The coldest month (with the lowest average low temperature) is January (18°F).
Average pressure in January
South Wilmington, IL
- Average pressure in January: 30.12"Hg
The month with the highest atmospheric pressure is January (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in January
South Wilmington, IL
- Average wind speed in January: 10.1mph
The windiest months (with the highest average wind speed) are January and April (10.1mph).
The calmest month (with the lowest average wind speed) is August (6mph).
Average humidity in January
South Wilmington, IL
- Average humidity in January: 82%
The month with the highest relative humidity is July (84%).
The month with the lowest relative humidity is October (72%).
Average rainfall in January
South Wilmington, IL
- Average rainfall in January: 1.06"
The wettest month (with the highest rainfall) is May (2.91").
The driest month (with the least rainfall) is February (0.98").
Average rainfall days in January
South Wilmington, IL
- Average rainfall days in January: 5.3 days
The month with the highest number of rainy days is July (17.3 days).
The month with the least rainy days is February (5.1 days).
Average snowfall in January
South Wilmington, IL
- Average snowfall in January: 1.89"
The month with the highest snowfall is February (2.52").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in January
South Wilmington, IL
- Average snowfall days in January: 11.5 days
The month with the highest number of snowfall days is January (11.5 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in January /
Average sunshine in January
South Wilmington, IL
- Average daylight in January: 9h and 4min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in January: 3h and 5min
The month with the most sunshine is June (Average sunshine: 9h and 54min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).
Average sunshine days in January
South Wilmington, IL
- Average sunshine days in January: 15.5 days
The month with the most sunshine days is November (19.3 days).
The month with the least sunshine days is July (9.5 days).
Average UV index in January
South Wilmington, IL
- Average UV index in January: 1
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in January
South Wilmington, IL
- Average cloud cover in January: 59
The month with the most cloud cover is January (Cloud cover 59).
The months with the least cloud cover are August and September (Cloud cover 33).
Average visibility in January
South Wilmington, IL
- Average visibility in January: 6mi
The months with the highest visibility are January, February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are July and August (5mi).
South Wilmington, Illinois, USA
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