Last updated: June 24, 2025
In September, the average temperature in Atlanta, United States hovers around 21°C (71°F). However, temperatures can vary significantly, with a minimum of 5°C (42°F) and a maximum soaring to 35°C (96°F). This month also brings 62 mm (2.4 in) of precipitation, typically spread over 6 days, contributing to an average humidity of 80%. Prepare for a mix of warm days and refreshing rains!
In September in Atlanta, the average temperature is 21°C (71°F). Maximums can reach 35°C (96°F), while minimums can drop to as low as 5°C (42°F). It's an ideal time for travelers seeking pleasant weather, but be prepared for both warmth and cooler evenings.
In Atlanta in September, the precipitation amount is 62 mm (2.4 in), spread over the course of 6 days.
In Atlanta in September humidity is 80%. With an average temperature of 21°C (71°F), this humidity feels like a warm, heavy blanket wrapping around you, making outdoor activities feel more exhausting and requiring frequent breaks to stay hydrated.
In Atlanta in September, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Atlanta.
UV Risk Categories
Weather in Atlanta varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Atlanta, focusing on differences in temperature, rainfall, humidity, and UV levels.
Temperature | Precipitation | Humidity | UV | |
---|---|---|---|---|
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 Weather | 6°C (43°F) | 121 mm (4.8 inches) | 84% | high |
April Weather | 11°C (52°F) | 123 mm (4.8 inches) | 85% | very high |
May Weather | 18°C (65°F) | 150 mm (5.9 inches) | 79% | very high |
June Weather | 23°C (74°F) | 123 mm (4.8 inches) | 82% | extreme |
July Weather | 25°C (77°F) | 114 mm (4.5 inches) | 80% | very high |
August Weather | 23°C (74°F) | 96 mm (3.8 inches) | 81% | very high |
September Weather | 21°C (71°F) | 62 mm (2.4 inches) | 80% | very high |
October Weather | 14°C (57°F) | 115 mm (4.5 inches) | 82% | high |
November Weather | 5°C (41°F) | 65 mm (2.6 inches) | 88% | moderate |
December Weather | 2°C (35°F) | 54 mm (2.1 inches) | 84% | low |