Marietta (GA) Weather and Climate: A Comprehensive Guide
Marietta experiences great temperature shifts.
The city's weather can transition from very warm days
to cold weather.
It also has a relatively rain/snowy climate with high levels of precipitation.
Let’s explore the climate details in depth to provide you with a complete overview.
Average maximum day and minimum night temperature
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 in July to a chilly 11°C in January.
Nighttime temperatures can drop, with average lows reaching -1°C in January.Check out our detailed temperature page for more information.
Temperature ranges by month
Precipitation and rainy days
Marietta has a notably wet climate with abundant precipitation, recording 1197 mm of rain/snowfall per year. The wettest period in Marietta occurs in December, which receives around 137 mm of precipitation. During the driest month, September, Marietta experiences moderate rainfall, totaling approximately 87 mm. The consistent precipitation levels throughout the year contribute to a relatively stable climate.
The mean monthly precipitation over the year, including rain, hail and snow
The average number of days each month with precipitation
Sunshine over the year
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
Daily hours of sunshine
Daily percentage of sunshine
Average humidity
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
Forecast for Marietta (GA)
Select a Month of Interest
Check the conditions for any month of the year.
The best time of year to visit Marietta in the United States of America
During the months of April and October you are most likely to experience good weather with pleasant average temperatures that fall between 20°C and 26°C.Other facts from our historical weather data:
August has an average maximum temperature of 31°C and is the warmest month of the year.
The coldest month is January with an average maximum temperature of 11°C.
December tops the wettest month list with 137 mm of rainfall.
September is the driest month with 87 mm of precipitation.
May is the sunniest month with an average of 288 hours of sunshine.
No idea where to travel to this year? We have a tool that recommends destinations based on your ideal conditions. Find out where to go with our weather planner.
