January weather forecast
Jerseyville, IL

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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.
Updated: Feb 12, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the coldest time of year in Jerseyville?

The coldest period in Jerseyville, Illinois, tends to be January, when average temperatures fluctuate between a high of 35.6°F (2°C) and a low of 22.6°F (-5.2°C).

How cold is January in Jerseyville?

The high-temperature, in January, in Jerseyville, records 35.6°F (2°C), while the low-temperature is 22.6°F (-5.2°C).

What is the average humidity in January in Jerseyville?

In January, the average relative humidity is 77%.

What is the driest month in Jerseyville?

The month with the least rainfall in Jerseyville, Illinois, is January, when the rain falls for 5.9 days and typically collects 1.06" (27mm) of precipitation.

How many days does it rain in January in Jerseyville?

In Jerseyville, during January, the rain falls for 5.9 days and regularly aggregates up to 1.06" (27mm) of precipitation.

How much does it snow in Jerseyville in January?

In Jerseyville, in January, snow falls for 6.2 days, with typically accumulated 1.65" (42mm) of snow.

How many hours of daylight does Jerseyville have in January?

In January, the average day length in Jerseyville is 9h and 47min.

What time are sunrise and sunset in January in Jerseyville?

In January, on the first day of the month, 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.

What is the month with the least sunshine in Jerseyville?

The month with the least sunshine in Jerseyville is January, with an average of 4.5h of sunshine.

How long on average sun shines in January in Jerseyville?

In Jerseyville, Illinois, the average sunshine duration in January is 4.5h.

When is the lowest UV index in Jerseyville?

The months with the lowest UV index in Jerseyville are January, February, November and December, with an average maximum UV index of 2.

What is the UV index intensity in January in Jerseyville?

In January, the average daily maximum UV index is 2. A UV Index of 2, and less, symbolizes a low health risk from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in January
Jerseyville, IL

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 - 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 - 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 - 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 - 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 - 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 - 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 - 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 / Average sunshine in January - Jerseyville, IL
  • Average daylight in January: 9h and 5min

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 3min

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 - 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 - 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 - 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 - 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).

Jerseyville, Illinois, USA

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