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January Weather in Atlanta, United States

Last updated: June 24, 2025

In January, the average temperature in Atlanta, United States is a brisk -2°C (28°F). Temperatures can swing from a chilling -28°C (-19°F) at their lowest to a comfortable 17°C (62°F) at their peak. Expect around 67 mm (2.7 in) of precipitation over 9 days, with humidity levels averaging a high 82%.

January Temperature in Atlanta

In January in Atlanta, the average temperature is -2°C (28°F), with maximums reaching 17°C (62°F) and minimums plunging as low as -28°C (-19°F). Travelers should be well-prepared for a range of temperatures, from chilly days to surprisingly mild afternoons.

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 (28°F), with highs reaching up to 17°C (62°F) and lows dropping to around -28°C (-19°F).
JanFebMarAprMayJunJulAugSepOctNovDec283043526574777470574135
Data source: Temperature data for Atlanta generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

January Precipitation in Atlanta

In Atlanta in January, the precipitation amount is 67 mm (2.7 in), occurring over a span of 9 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 67 mm (2.7 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec677012112315012311496621156554
Data source: Precipitation data for January generated using information from the Copernicus Climate Change Service.
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January Humidity in Atlanta

In Atlanta in January, humidity is 82%. With an average temperature of -2°C (28°F), this humidity feels like an icy shroud enveloping you, making every breath feel crisp and biting as you navigate through a winter wonderland, each step a reminder of the contrast between the cold air and the heavy moisture lingering in the atmosphere.

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 82%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec82%83%84%85%79%82%80%81%80%82%88%84%
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.
JanFebMarAprMayJunJulAugSepOctNovDec357910111098642
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.
 TemperaturePrecipitationHumidityUV
January Weather-2°C (28°F)67 mm (2.7 inches)82%moderate
February Weather-1°C (31°F)70 mm (2.7 inches)83%moderate
March Weather6°C (43°F)121 mm (4.8 inches)84%high
April Weather11°C (52°F)123 mm (4.8 inches)85%very high
May Weather18°C (65°F)150 mm (5.9 inches)79%very high
June Weather23°C (74°F)123 mm (4.8 inches)82%extreme
July Weather25°C (77°F)114 mm (4.5 inches)80%very high
August Weather23°C (74°F)96 mm (3.8 inches)81%very high
September Weather21°C (71°F)62 mm (2.4 inches)80%very high
October Weather14°C (57°F)115 mm (4.5 inches)82%high
November Weather5°C (41°F)65 mm (2.6 inches)88%moderate
December Weather2°C (35°F)54 mm (2.1 inches)84%low

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