Decatur (GA) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Decatur.
Climate overview of Decatur
Temperatures in Decatur, Georgia, United States of America, vary greatly throughout the year. July is the hottest month at 32°C (90°F), while January is the coldest at 11°C (52°F).
Rain/snowfall is high, totalling around 1273 mm (50 in) per year. December is the wettest month and June the driest. The city also experiences very warm summers and cold winters. The sunniest month is May, with 9.6 hours of sunshine per day on average.
Decatur Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Decatur - and find the best time to visit.
Monthly Temperature in Decatur
The climate in Decatur is known for significant temperature differences throughout the year, making the weather dynamic. Average maximum daytime temperatures range from a very warm 32°C (90°F) in July, the warmest time of the year, to a chilly 11°C (52°F) during cooler months like January.
At night, you can expect temperatures ranging from 21°C (70°F) in July to around 0°C (32°F) during January.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Decatur
Decatur has a notably wet climate with abundant precipitation, recording 1273 mm (50 in) of rain/snowfall per year. While rainfall varies throughout the year, each season offers its own charm. December brings wetter days averaging 150 mm (5.9 in) of precipitation, spread over 12 rainy days.
In contrast, the driest month June experiences a drier climate, with about 80 mm (3.1 in) of rainfall spread across 11 rainy days. For more details, please visit our Decatur Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Sunshine Hours in Decatur
Seasonal changes in sunshine hours are quite dramatic in Decatur. While May receives considerable daily sunshine with up to 9.6 hours, January marks the darkest time of the year, where sunshine is scarce with only 5.5 hours of sunlight per day.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Daily percentage of sunshine
Humidity in Decatur by Month
The relative humidity is high throughout the year in Decatur.
The city experiences its highest humidity in August, reaching 75%. In April, the humidity drops to its lowest level at 61%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Best Time to Visit Decatur
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: April, May, September and October
- Warmest weather: June, July and August
- Most sunshine: May and June
- Fewest rainy days: April, September, October and November
- Seasonal pattern: Very warm summers and cold winters
Frequently asked questions about the climate in Decatur
What is the best time to visit Decatur?
April, May, September and October typically offer the most optimal weather in Decatur. In contrast, January and February tend to have less optimal conditions. Decatur has very warm summers and cold winters.
What temperatures can I expect in Decatur?
Daytime highs range from 11°C (52°F) in January to 32°C (90°F) in July. Nighttime lows range from 0°C (32°F) to 21°C (70°F). Temperatures vary considerably through the year.
How much rain does Decatur get?
Annual rainfall is around 1273 mm (50 in). December is the wettest month with 150 mm (5.9 in), while June is the driest with 80 mm (3.1 in).
How sunny is Decatur?
Decatur receives around 2,733 hours of sunshine per year. May is the sunniest month with 288 hours, while January is the cloudiest with just 164 hours. Overall, Decatur enjoys abundant sunshine.
Decatur 3-Day Forecast
Decatur (GA) 3-Day Forecast
Decatur on the map
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