Contents
- Weather in January
- Frequently asked questions
- Average temperature in January
- Average pressure in January
- Average wind speed in January
- Average humidity in January
- Average rainfall in January
- Average rainfall days in January
- Average snowfall in January
- Average snowfall days in January
- Average daylight in January
- Average sunshine in January
- Average sunshine days in January
- Average UV index in January
- Average cloud cover in January
- Average visibility in January
Weather in January
Temperature
Flat Rock's coldest weather arrives in January, when temperatures average a high of 36.1°F (2.3°C) and a low of 23.4°F (-4.8°C).Humidity
In January, the average relative humidity is 78%.Rainfall
In Flat Rock, in January, during 8.4 rainfall days, 2.56" (65mm) of precipitation is typically accumulated. Throughout the year, in Flat Rock, Illinois, there are 162.4 rainfall days, and 36.85" (936mm) of precipitation is accumulated.Snowfall
January through April, November and December are months with snowfall in Flat Rock. The month with the most snowfall in Flat Rock, Illinois, is January, when snow falls for 6.8 days and typically aggregates up to 2.32" (59mm) of snow.Daylight
In Flat Rock, the average length of the day in January 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, in Flat Rock, sunrise is at 6:57 am and sunset at 5:10 pm CST.
Sunshine
With an average of 4.2h of sunshine, January has the least sunshine of the year in Flat Rock, Illinois.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 exposure to the Sun's UV radiation for the average person.Note: In January, an average UV index of 2 transforms into the following instructions:
It is important to always shield children, babies, and individuals with sensitive skin from prolonged exposure to the sun. Midday is when the Sun's radiation is strongest; avoid prolonged exposure during this time. Opt for tightly woven and loose clothing to enhance protection from the Sun. Attention! Nearly twice the Sun's UV radiation can be reflected by snow.
Frequently asked questions
What time of the year is the coldest in Flat Rock?
How cold is January in Flat Rock?
What is the average humidity in January in Flat Rock?
How many days does it rain in January in Flat Rock?
When does it snow the most in Flat Rock?
How many days does it snow in January in Flat Rock?
What is the average length of the day in January in Flat Rock?
When is the sunrise / sunset in January in Flat Rock?
What is the month with the least sunshine in Flat Rock?
How long on average sun shines in January in Flat Rock?
When is the lowest UV index in Flat Rock?
What is the UV index reading in January in Flat Rock?
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 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 1min
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).
Flat Rock, Illinois, USA
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