Contents
- Weather in December
- Frequently asked questions
- Average temperature in December
- Average pressure in December
- Average wind speed in December
- Average humidity in December
- Average rainfall in December
- Average rainfall days in December
- Average snowfall in December
- Average snowfall days in December
- Average daylight in December
- Average sunshine in December
- Average sunshine days in December
- Average UV index in December
- Average cloud cover in December
- Average visibility in December
Weather in December
Temperature
Atlanta's December weather features a mild decline in high-temperatures, reducing from a chilly 49.1°F (9.5°C) in November to a wintry 37.4°F (3°C). Atlanta's average low-temperature is measured at a subzero cold 27°F (-2.8°C) during December.Humidity
The average relative humidity in December is 79%.Rainfall
December is the month with the least rainfall in Atlanta. Rain falls for 7.2 days and accumulates 0.87" (22mm) of precipitation.Snowfall
Months with snowfall in Atlanta are January through April, November and December. In Atlanta, in December, snow falls for 5.3 days, with typically accumulated 0.91" (23mm) of snow. In Atlanta, Illinois, during the entire year, snow falls for 27.1 days and aggregates up to 7.2" (183mm) of snow.Daylight
With an average of 9h and 24min of daylight, December has the shortest days of the year.On the first day of December in Atlanta, sunrise is at 7:00 am and sunset at 4:31 pm. On the last day of the month, sunrise is at 7:19 am and sunset at 4:41 pm CST.
Sunshine
In Atlanta, the average sunshine in December is 4.5h.UV index
The months with the lowest UV index in Atlanta are January, February, November and December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a low health risk from exposure to the Sun's UV radiation for the average person.Note: An average UV index of 2 in December transforms into this advice:
Extended time in the sun generally does not harm most, but those with sensitive skin, infants, and children should always be protected. Solar radiation peaks around mid-day, so it's wise to limit exposure to the Sun at this time. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection. Take precaution! The reflection from snow can almost double the UV radiation of the Sun.
Frequently asked questions
How cold is December in Atlanta?
What is the average humidity in December in Atlanta?
What is the driest month in Atlanta?
How much does it rain in Atlanta in December?
How much does it snow in Atlanta in December?
What is the month with the shortest days in Atlanta?
What is the average length of the day in December in Atlanta?
What time are sunrise and sunset in December in Atlanta?
How many hours of sunshine does Atlanta have in December?
When is the lowest UV index in Atlanta?
What is the UV index reading in December in Atlanta?
Average temperature in December
Atlanta, IL
- Average high temperature in December: 37.4°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 December: 27°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 December
Atlanta, IL
- Average pressure in December: 30.12"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 December
Atlanta, IL
- Average wind speed in December: 9.9mph
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 December
Atlanta, IL
- Average humidity in December: 79%
The month with the highest relative humidity is July (85%).
The month with the lowest relative humidity is October (70%).
Average rainfall in December
Atlanta, IL
- Average rainfall in December: 0.87"
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 December
Atlanta, IL
- Average rainfall days in December: 7.2 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 December
Atlanta, IL
- Average snowfall in December: 0.91"
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 December
Atlanta, IL
- Average snowfall days in December: 5.3 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 December /
Average sunshine in December
Atlanta, IL
- Average daylight in December: 9h and 2min
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 December: 4h and 3min
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 December
Atlanta, IL
- Average sunshine days in December: 20 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 December
Atlanta, IL
- Average UV index in December: 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 December
Atlanta, IL
- Average cloud cover in December: 53
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 December
Atlanta, IL
- Average visibility in December: 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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