January weather forecastJerseyville, IL
January
Weather in January
January, like December, in Jerseyville, Illinois, is a wintry winter month, with an average temperature ranging between min 22.6°F (-5.2°C) and max 35.6°F (2°C).Temperature
Jerseyville's temperature records reveal January as the coldest month, marked by average highs of 35.6°F (2°C) and lows of 22.6°F (-5.2°C).Humidity
The average relative humidity in January in Jerseyville is 77%.Rainfall
The month with the least rainfall in Jerseyville is January, when the rain falls for 5.9 days and typically collects 1.06" (27mm) of precipitation.Snowfall
Months with snowfall in Jerseyville, Illinois, are January through March, November and December. In Jerseyville, in January, snow falls for 6.2 days, with typically accumulated 1.65" (42mm) of snow. Throughout the year, there are 20.9 snowfall days, and 6.26" (159mm) of snow is accumulated.Daylight
In January, the average length of the day is 9h and 47min.On the first day of January in Jerseyville, sunrise is at 7:20 am and sunset at 4:49 pm. On the last day of the month, sunrise is at 7:08 am and sunset at 5:20 pm CST.
Sunshine
The month with the least sunshine in Jerseyville is January, with an average of 4.5h of sunshine.UV index
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV radiation for the average person.Note: A maximum daily UV index of 2 during January morphs into the following directions:
While most can endure approximately an hour in the sun without burning, children always require protection from sunlight. The best time to avoid the Sun's harmful UV radiation is during midday when it's most potent. Stay sun-safe with clothing that is both closely woven and worn loosely. Be careful! The Sun's UV radiation can nearly be doubled by the reflective quality of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in January
Jerseyville, IL
- Average high temperature in January: 35.6°F
The warmest month (with the highest average high temperature) is July (84.7°F).
The month with the lowest average high temperature is January (35.6°F).
- Average low temperature in January: 22.6°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 (22.6°F).
Average pressure in January
Jerseyville, IL
- Average pressure in January: 30.15"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in January
Jerseyville, IL
- Average wind speed in January: 9.6mph
The windiest months (with the highest average wind speed) are January and February (9.6mph).
The calmest month (with the lowest average wind speed) is July (5.7mph).
Average humidity in January
Jerseyville, IL
- Average humidity in January: 77%
The month with the highest relative humidity is July (80%).
The month with the lowest relative humidity is October (71%).
Average rainfall in January
Jerseyville, IL
- Average rainfall in January: 1.06"
The wettest month (with the highest rainfall) is June (3.07").
The driest month (with the least rainfall) is January (1.06").
Average rainfall days in January
Jerseyville, IL
- Average rainfall days in January: 5.9 days
The month with the highest number of rainy days is May (16.5 days).
The month with the least rainy days is January (5.9 days).
Average snowfall in January
Jerseyville, IL
- Average snowfall in January: 1.65"
The month with the highest snowfall is February (2.17").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in January
Jerseyville, IL
- Average snowfall days in January: 6.2 days
The month with the highest number of snowfall days is January (6.2 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
Jerseyville, IL
- Average daylight in January: 9h and 48min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in January: 4h and 30min
The month with the most sunshine is June (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 4h and 30min).
Average sunshine days in January
Jerseyville, IL
- Average sunshine days in January: 20.3 days
The month with the most sunshine days is January (20.3 days).
The months with the least sunshine days are May and June (12.3 days).
Average UV index in January
Jerseyville, IL
- Average UV index in January: 2
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, February, November and December (UV index 2).
Average cloud cover in January
Jerseyville, IL
- Average cloud cover in January: 51
The month with the most cloud cover is January (Cloud cover 51).
The months with the least cloud cover are August and September (Cloud cover 28).
Average visibility in January
Jerseyville, 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).
