January weather forecastFlat Rock, IL
January
Weather in January
January, the same as December, is a wintry winter month in Flat Rock, Illinois, with an average temperature fluctuating between 36.1°F (2.3°C) and 23.4°F (-4.8°C).Temperature
January is the month when Flat Rock, Illinois, sees the lowest average temperatures, with a high of 36.1°F (2.3°C) and a low of 23.4°F (-4.8°C).Humidity
In Flat Rock, the average relative humidity in January is 78%.Rainfall
In Flat Rock, in January, it is raining for 8.4 days, with typically 2.56" (65mm) of accumulated precipitation. In Flat Rock, during the entire year, the rain falls for 162.4 days and collects up to 36.85" (936mm) of precipitation.Snowfall
Months with snowfall are January through April, November and December. The month with the most snowfall is January, when snow falls for 6.8 days and typically aggregates up to 2.32" (59mm) of snow.Daylight
In January, the average length of the day is 9h and 49min.On the first day of the month, sunrise is at 7:09 am and sunset at 4:39 pm. On the last day of January, sunrise is at 6:57 am and sunset at 5:10 pm CST.
Sunshine
The month with the least sunshine in Flat Rock is January, with an average of 4.2h 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 reading of 2, and below, represents a low threat to health from unsafe exposure to UV radiation for the ordinary person.Note: A maximum high UV index of 2 in January translates into the following recommendations:
Apart from children, who require continuous protection, most can endure sun exposure for up to an hour without experiencing burns. For skin protection, it's recommended to minimize Sun exposure during its peak hours around midday. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection. Keep in mind! Snow's reflective quality can nearly double the intensity of the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in January
Flat Rock, IL
- Average high temperature in January: 36.1°F
The warmest month (with the highest average high temperature) is July (83.8°F).
The month with the lowest average high temperature is January (36.1°F).
- Average low temperature in January: 23.4°F
The month with the highest average low temperature is July (66.9°F).
The coldest month (with the lowest average low temperature) is January (23.4°F).
Average pressure in January
Flat Rock, 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 (29.93"Hg).
Average wind speed in January
Flat Rock, IL
- Average wind speed in January: 10mph
The windiest months (with the highest average wind speed) are January and February (10mph).
The calmest months (with the lowest average wind speed) are July and August (5.9mph).
Average humidity in January
Flat Rock, IL
- Average humidity in January: 78%
The month with the highest relative humidity is July (81%).
The month with the lowest relative humidity is October (71%).
Average rainfall in January
Flat Rock, IL
- Average rainfall in January: 2.56"
The wettest month (with the highest rainfall) is April (5.2").
The driest month (with the least rainfall) is September (1.89").
Average rainfall days in January
Flat Rock, IL
- Average rainfall days in January: 8.4 days
The month with the highest number of rainy days is May (19.8 days).
The month with the least rainy days is January (8.4 days).
Average snowfall in January
Flat Rock, IL
- Average snowfall in January: 2.32"
The month with the highest snowfall is January (2.32").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in January
Flat Rock, IL
- Average snowfall days in January: 6.8 days
The month with the highest number of snowfall days is January (6.8 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
Flat Rock, 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 12min
The month with the most sunshine is June (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 4h and 12min).
Average sunshine days in January
Flat Rock, IL
- Average sunshine days in January: 16.3 days
The month with the most sunshine days is November (18 days).
The month with the least sunshine days is May (9.7 days).
Average UV index in January
Flat Rock, IL
- Average UV index in January: 2
The months with the highest UV index are 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
Flat Rock, IL
- Average cloud cover in January: 55
The month with the most cloud cover is January (Cloud cover 55).
The month with the least cloud cover is August (Cloud cover 29).
Average visibility in January
Flat Rock, 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).
