January Weather in Atlanta, United States

Last updated: June 24, 2025

In Atlanta, United States, the average temperature in January hovers around -2°C (29°F), with occasional extremes ranging from a frigid -28°C (-17°F) to a surprisingly warm 18°C (64°F). Rainfall isn't too frequent, with a total precipitation of 78 mm (3.1 in) over just 8 days. Additionally, expect a high level of dampness, as the average humidity sits at a notable 85%.

January Temperature in Atlanta

In January in Atlanta, the average temperature is -2°C (29°F), with maximums reaching 18°C (64°F) and minimums dropping as low as -28°C (-17°F). It's essential to prepare for a wide range of temperatures during your travels, ensuring you pack both warm and slightly lighter clothing for your visit.

January Weather in Atlanta: Daily Temperature Highs, Lows, and Averages

The chart illustrates January temperature patterns in Atlanta, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Atlanta, January typically has an average temperature of -2°C (29°F), with highs reaching up to 18°C (64°F) and lows dropping to around -28°C (-17°F).

Data source: Temperature data for Atlanta generated using information from the Copernicus Climate Change Service.

January Precipitation in Atlanta

In Atlanta in January, the total precipitation amount is 78 mm (3.1 in) over the course of 8 days.

January Precipitation Trends in Atlanta

The chart displays monthly precipitation patterns in Atlanta, with values for each month alongside January’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how January’s conditions compare to those of other months. In Atlanta, January typically receives around 78 mm (3.1 inches) of precipitation spread over approximately 8 days.

Data source: Precipitation data for January generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

January Humidity in Atlanta

In Atlanta in January, humidity is 85%. With an average temperature of -2°C (29°F), this humidity feels like a chilling, damp blanket that clings to your skin, making travel uncomfortable and often prompting an urgent search for warmth and shelter.

January Average Humidity in Atlanta

This chart illustrates the average monthly humidity levels in Atlanta, with January’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In January, average humidity in Atlanta is approximately 85%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for January generated using information from the Copernicus Climate Change Service.

January UV Index in Atlanta

In Atlanta in January, the maximum UV index is 3, which corresponds to a moderate Exposure Category. The time to burn is approximately 30 minutes. For more details on the hourly UV index in Atlanta, you can check the information here.

Maximum UV Index Levels in Atlanta for January

The chart shows the monthly maximum UV Index (UVI) for Atlanta in January, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In January, the maximum UV index in Atlanta typically reaches 3, which falls under the moderate exposure category.

Data source: Atlanta January UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

Extreme (11+): Avoid the sun, stay in shade.
Very High (8-10): Limit sun exposure.
High (6-7): Use SPF 30+ and protective clothing.
Moderate (3-5): Midday shade recommended.
Low (0-2): No protection needed.

How January Weather in Atlanta Compares to Other Months

Weather in Atlanta varies notably across the year, with each month offering distinct climate conditions. This page compares January’s weather to other months in Atlanta, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Atlanta, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-2°C (29°F)	78 mm (3.1 inches)	85%	moderate
February Weather	0°C (32°F)	87 mm (3.4 inches)	85%	moderate
March Weather	5°C (42°F)	113 mm (4.4 inches)	86%	high
April Weather	11°C (52°F)	93 mm (3.7 inches)	87%	very high
May Weather	18°C (64°F)	143 mm (5.6 inches)	81%	very high
June Weather	23°C (73°F)	113 mm (4.4 inches)	82%	extreme
July Weather	24°C (76°F)	106 mm (4.2 inches)	81%	very high
August Weather	23°C (73°F)	101 mm (4.0 inches)	79%	very high
September Weather	20°C (69°F)	75 mm (2.9 inches)	78%	very high
October Weather	14°C (57°F)	105 mm (4.1 inches)	81%	high
November Weather	5°C (41°F)	83 mm (3.3 inches)	89%	moderate
December Weather	2°C (35°F)	69 mm (2.7 inches)	86%	low