January weather forecastHartsville, IL
January
Weather in January
January, the same as December, is another cold winter month in Hartsville, Illinois, with temperature in the range of an average low of 26.2°F (-3.2°C) and an average high of 39.7°F (4.3°C).Temperature
January is the month when Hartsville experiences its coldest temperatures, averaging a high of 39.7°F (4.3°C) and a low of 26.2°F (-3.2°C).Humidity
In January, the average relative humidity is 77%.Rainfall
In Hartsville, during January, the rain falls for 9.8 days and regularly aggregates up to 2.68" (68mm) of precipitation. In Hartsville, Illinois, during the entire year, the rain falls for 158.7 days and collects up to 36.1" (917mm) of precipitation.Snowfall
Months with snowfall in Hartsville are January through April, November and December. The month with the most snowfall in Hartsville is January, when snow falls for 5.3 days and typically aggregates up to 1.73" (44mm) of snow.Daylight
The average length of the day in January is 9h and 55min.On the first day of January in Hartsville, sunrise is at 7:08 am and sunset at 4:46 pm. On the last day of the month, sunrise is at 6:58 am and sunset at 5:16 pm CST.
Sunshine
In January, the average sunshine is 4.6h.UV index
The months with the lowest UV index are January, February and December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a minimal health hazard from unprotected exposure to Sun's UV rays for the ordinary person.Note: A daily high UV index of 2 in January leads to these guidelines:
Prolonged sun exposure should always be prevented in babies, children, and those with sensitive skin. The Sun is at its harshest during midday; protect yourself by staying in shaded areas and minimizing exposure. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades. Take to heart! Snow reflection can almost magnify the Sun's UV radiation twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in January
Hartsville, IL
- Average high temperature in January: 39.7°F
The warmest month (with the highest average high temperature) is July (87.3°F).
The month with the lowest average high temperature is January (39.7°F).
- Average low temperature in January: 26.2°F
The month with the highest average low temperature is July (68.5°F).
The coldest month (with the lowest average low temperature) is January (26.2°F).
Average pressure in January
Hartsville, 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
Hartsville, IL
- Average wind speed in January: 9.4mph
The windiest months (with the highest average wind speed) are January and February (9.4mph).
The calmest months (with the lowest average wind speed) are July and August (5.8mph).
Average humidity in January
Hartsville, IL
- Average humidity in January: 77%
The month with the highest relative humidity is May (79%).
The month with the lowest relative humidity is October (70%).
Average rainfall in January
Hartsville, IL
- Average rainfall in January: 2.68"
The wettest month (with the highest rainfall) is April (4.8").
The driest month (with the least rainfall) is September (1.61").
Average rainfall days in January
Hartsville, IL
- Average rainfall days in January: 9.8 days
The month with the highest number of rainy days is May (18.5 days).
The month with the least rainy days is November (9.7 days).
Average snowfall in January
Hartsville, IL
- Average snowfall in January: 1.73"
The month with the highest snowfall is January (1.73").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in January
Hartsville, IL
- Average snowfall days in January: 5.3 days
The month with the highest number of snowfall days is January (5.3 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
Hartsville, IL
- Average daylight in January: 9h and 54min
The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in January: 4h and 36min
The month with the most sunshine is June (Average sunshine: 10h and 36min).
The month with the least sunshine is December (Average sunshine: 4h and 30min).
Average sunshine days in January
Hartsville, IL
- Average sunshine days in January: 16.2 days
The month with the most sunshine days is October (19.5 days).
The month with the least sunshine days is May (9.9 days).
Average UV index in January
Hartsville, 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 and December (UV index 2).
Average cloud cover in January
Hartsville, IL
- Average cloud cover in January: 51
The months with the most cloud cover are January and February (Cloud cover 51).
The month with the least cloud cover is June (Cloud cover 28).
Average visibility in January
Hartsville, 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).
