January weather forecastBig Rock, IL
January
Weather in January
January, like December, is another subzero cold winter month in Big Rock, Illinois, with an average temperature ranging between min 15.8°F (-9°C) and max 27.9°F (-2.3°C).Temperature
January, with its average high-temperature of 27.9°F (-2.3°C) and an average low-temperature of 15.8°F (-9°C), holds the record as the coldest month.Humidity
January, July and August, with an average relative humidity of 84%, are the most humid months.Rainfall
In Big Rock, during January, the rain falls for 6.5 days and regularly aggregates up to 1.73" (44mm) of precipitation. In Big Rock, during the entire year, the rain falls for 156.4 days and collects up to 30.98" (787mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. The month with the most snowfall is January, when snow falls for 13.1 days and typically aggregates up to 4.65" (118mm) of snow.Daylight
In Big Rock, the average length of the day in January is 9h and 34min.On the first day of January, sunrise is at 7:21 am and sunset at 4:33 pm. On the last day of the month, sunrise is at 7:07 am and sunset at 5:07 pm CST.
Sunshine
With an average of 3.7h of sunshine, January has the least sunshine of the year.UV index
The months with the lowest UV index are January and December, with an average maximum UV index of 1. A UV Index value of 2, and less, symbolizes a low health risk from unsafe exposure to UV radiation for the ordinary person.Note: A maximum UV index of 1 in January translates into the following recommendations:
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. UV radiation is strongest from the Sun during midday; protect yourself by staying in shaded areas. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration. Take heed! Reflection from the snow can almost amplify the Sun's UV radiation by double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in January
Big Rock, IL
- Average high temperature in January: 27.9°F
The warmest month (with the highest average high temperature) is July (80.6°F).
The month with the lowest average high temperature is January (27.9°F).
- Average low temperature in January: 15.8°F
The month with the highest average low temperature is July (63.3°F).
The coldest month (with the lowest average low temperature) is January (15.8°F).
Average pressure in January
Big Rock, IL
- Average pressure in January: 30.11"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in January
Big Rock, IL
- Average wind speed in January: 9.8mph
The windiest months (with the highest average wind speed) are January, February and April (9.8mph).
The calmest month (with the lowest average wind speed) is August (6mph).
Average humidity in January
Big Rock, IL
- Average humidity in January: 84%
The months with the highest relative humidity are January, July and August (84%).
The month with the lowest relative humidity is October (74%).
Average rainfall in January
Big Rock, IL
- Average rainfall in January: 1.73"
The wettest month (with the highest rainfall) is May (4.33").
The driest month (with the least rainfall) is December (1.57").
Average rainfall days in January
Big Rock, IL
- Average rainfall days in January: 6.5 days
The month with the highest number of rainy days is July (18.2 days).
The month with the least rainy days is February (6 days).
Average snowfall in January
Big Rock, IL
- Average snowfall in January: 4.65"
The month with the highest snowfall is January (4.65").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in January
Big Rock, IL
- Average snowfall days in January: 13.1 days
The month with the highest number of snowfall days is January (13.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in January /
Average sunshine in January
Big Rock, IL
- Average daylight in January: 9h and 36min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in January: 3h and 42min
The month with the most sunshine is August (Average sunshine: 9h and 36min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days in January
Big Rock, IL
- Average sunshine days in January: 14.3 days
The month with the most sunshine days is November (16.4 days).
The month with the least sunshine days is April (10.3 days).
Average UV index in January
Big Rock, IL
- Average UV index in January: 1
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in January
Big Rock, IL
- Average cloud cover in January: 61
The month with the most cloud cover is January (Cloud cover 61).
The months with the least cloud cover are August and September (Cloud cover 34).
Average visibility in January
Big Rock, IL
- Average visibility in January: 5mi
The months with the highest visibility are March, April, May, June, October, November and December (6mi).
The months with the lowest visibility are January, February, July, August and September (5mi).
