Yosemite National Park is definitely worth a visit
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Marietta (GA) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Marietta.
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Climate overview of Marietta
Temperatures in Marietta, Georgia, United States of America, vary greatly throughout the year. July is the hottest month at 31°C (88°F), while January is the coldest at 11°C (52°F).
The city has a wet climate, receiving around 1197 mm (47 in) of rain/snowfall per year. Despite the high annual total, it has very warm summers and cold winters. December is the wettest month. Sunshine peaks in May, when the city sees around 9.6 hours of sunshine per day.
Marietta Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Marietta - and find the best time to visit.
Monthly Temperature in Marietta
The climate in Marietta is known for significant temperature differences throughout the year, making the weather dynamic. On average, daytime temperatures range from a very warm 31°C (88°F) in July to a chilly 11°C (52°F) in January.
Nighttime temperatures range from 21°C (70°F) in July to -1°C (30°F) in January.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Marietta
Marietta has a notably wet climate with abundant precipitation, recording 1197 mm (47 in) of rain/snowfall per year. The wettest period in Marietta occurs in December, which receives around 137 mm (5.4 in) of precipitation. During the driest month, September, Marietta experiences moderate rainfall, totaling 87 mm (3.4 in). The consistent precipitation levels throughout the year contribute to a relatively stable climate. For more details, please visit our Marietta 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 Marietta
In Marietta, summer days are longer and more sunny, with daily sunshine hours peaking at 9.6 hours in May. As the darker season arrives, the brightness of the sun becomes less. January sees a soft sun for only 5.5 hours per average day.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Data from: Atlanta, the United States of America (27 KM, 16 Miles).
Daily hours of sunshine
Data from: Atlanta, the United States of America (27 KM, 16 Miles).
Daily percentage of sunshine
Data from: Atlanta, the United States of America (27 KM, 16 Miles).
Humidity in Marietta by Month
The relative humidity is high throughout the year in Marietta.
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
Data from: Atlanta, the United States of America (27 KM, 16 Miles).
Best Time to Visit Marietta
For comfortable weather, consider visiting Marietta in May, September and October. Conditions are usually least favourable in January, February and December.
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
Jan
wet
Feb
wet
Mar
good
Apr
very good
May
excellent
Jun
good
Jul
mixed
Aug
good
Sep
excellent
Oct
excellent
Nov
good
Dec
wet
- Best overall: May, September and October
- Warmest weather: June, July and August
- Most sunshine: May and June
- Seasonal pattern: Very warm summers and cold winters
- Coldest conditions: January, with freezing nights around -1°C (30°F).
Frequently asked questions about the climate in Marietta
What is the best time to visit Marietta?
May, September and October typically offer the most optimal weather in Marietta. In contrast, January, February and December tend to have less optimal conditions. Marietta has very warm summers and cold winters.
What temperatures can I expect in Marietta?
Daytime highs range from 11°C (52°F) in January to 31°C (88°F) in July. Nighttime lows range from -1°C (30°F) to 21°C (70°F). Temperatures vary considerably through the year.
How much rain does Marietta get?
Annual rainfall is around 1197 mm (47 in). December is the wettest month with 137 mm (5.4 in), while September is the driest with 87 mm (3.4 in).
How sunny is Marietta?
Marietta 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, Marietta enjoys abundant sunshine.
Marietta 3-Day Forecast
Marietta on the map
Marietta is highlighted - select any city to see its climate.
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