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
January, with its high-temperature average of 31.6°F (-0.2°C) and a low-temperature average of 19.8°F (-6.8°C), is the coldest month.Humidity
In Atlanta, the average relative humidity in January is 80%.Rainfall
In Atlanta, in January, it is raining for 6.6 days, with typically 0.98" (25mm) of accumulated precipitation. Throughout the year, there are 135 rainfall days, and 17.72" (450mm) of precipitation is accumulated.Snowfall
January through April, November and December are months with snowfall. January is the month with the most snowfall. Snow falls for 9.5 days and accumulates 2.2" (56mm) of snow.Daylight
In Atlanta, the average length of the day in January is 9h and 41min.On the first day of the month, sunrise is at 7:19 am and sunset at 4:41 pm. On the last day of January, sunrise is at 7:06 am and sunset at 5:13 pm CST.
Sunshine
With an average of 4h of sunshine, January has the least sunshine of the year.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index reading of 2, and below, represents a minimal health hazard from unprotected exposure to Sun's UV rays for the average person.Note: A maximum daily UV index of 2 during January morphs into the following directions:
It is important to always shield children, babies, and individuals with sensitive skin from prolonged exposure to the sun. Around midday, solar radiation is most harmful; hence, exposure should be limited. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat. Be informed! The Sun's UV radiation can be nearly doubled due to the reflection from snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the coldest time of year?
How cold is January?
What is the average humidity in January?
How many days does it rain in January?
When does it snow the most?
How many days does it snow in January?
How many hours of daylight does Atlanta have in January?
When are sunrise and sunset in January?
What is the month with the least sunshine?
How long on average sun shines in January?
When is the lowest UV index?
What is the UV index reading in January in Atlanta?
Average temperature in January
Atlanta, IL
- Average high temperature in January: 31.6°F
The warmest month (with the highest average high temperature) is July (81.5°F).
The month with the lowest average high temperature is January (31.6°F).
- Average low temperature in January: 19.8°F
The month with the highest average low temperature is July (65.1°F).
The coldest month (with the lowest average low temperature) is January (19.8°F).
Average pressure in January
Atlanta, IL
- Average pressure in January: 30.14"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in January
Atlanta, IL
- Average wind speed in January: 10.5mph
The windiest month (with the highest average wind speed) is April (10.6mph).
The calmest month (with the lowest average wind speed) is August (6.3mph).
Average humidity in January
Atlanta, IL
- Average humidity in January: 80%
The month with the highest relative humidity is July (85%).
The month with the lowest relative humidity is October (70%).
Average rainfall in January
Atlanta, IL
- Average rainfall in January: 0.98"
The wettest month (with the highest rainfall) is May (2.2").
The driest month (with the least rainfall) is December (0.87").
Average rainfall days in January
Atlanta, IL
- Average rainfall days in January: 6.6 days
The month with the highest number of rainy days is May (16.5 days).
The month with the least rainy days is February (5.9 days).
Average snowfall in January
Atlanta, IL
- Average snowfall in January: 2.2"
The month with the highest snowfall is January (2.2").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in January
Atlanta, IL
- Average snowfall days in January: 9.5 days
The month with the highest number of snowfall days is January (9.5 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
Atlanta, IL
- Average daylight in January: 9h and 4min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in January: 4h and 0min
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 0min).
Average sunshine days in January
Atlanta, IL
- Average sunshine days in January: 18.8 days
The months with the most sunshine days are November and December (20 days).
The month with the least sunshine days is May (11.6 days).
Average UV index in January
Atlanta, 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
Atlanta, IL
- Average cloud cover in January: 57
The month with the most cloud cover is January (Cloud cover 57).
The month with the least cloud cover is September (Cloud cover 30).
Average visibility in January
Atlanta, IL
- Average visibility in January: 6mi
The months with the highest visibility are January, February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are July and August (5mi).
Atlanta, Illinois, USA
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