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Marietta (GA) Climate by Month

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 day and 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 averages reaching -1°C in January.

The mean minimum and maximum temperatures throughout the year

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

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.

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).

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:
  • Which is the warmest month in Marietta?
    August has an average maximum temperature of 31°C and is the warmest month of the year.
  • Which is the coldest month in Marietta?
    The coldest month is January with an average maximum temperature of 11°C.
  • Which is the wettest month in Marietta?
    December tops the wettest month list with 137 mm of rainfall.
  • Which is the driest month in Marietta?
    September is the driest month with 87 mm of precipitation.
  • Which is the sunniest month in Marietta?
    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.

    Forecast for Marietta (GA)

    Fri   Nov 22
    10°C | 2°C
    NW 25 km/h
    almost clear and no rain

    almost clear and no rain

    Sat   Nov 23
    13°C | 4°C
    NW 18 km/h
    clear and no rain

    clear and no rain

    Sun   Nov 24
    18°C | 3°C
    SW 11 km/h
    clear and no rain

    clear and no rain