Climate

Marietta weather by month

Average highs, lows, rain and snow for every month, from 30 years of weather records.

Average temperatures

Best time to visit: April, June, September, when highs are mild and rain is lightest.

Month	High	Low	Rain	Snow	Wet days
January	53°F	32°F	4.9 in	0.70 in	10
February	57°F	35°F	4.9 in	0.20 in	9
March	65°F	40°F	4.9 in	0.10 in	10
April	72°F	48°F	4.0 in	0.00 in	8
May	77°F	57°F	4.2 in	0.00 in	9
June	82°F	65°F	4.1 in	0.00 in	10
July	84°F	68°F	7.0 in	0.00 in	12
August	84°F	68°F	4.8 in	0.00 in	10
September	80°F	62°F	3.7 in	0.00 in	7
October	71°F	51°F	4.2 in	0.00 in	7
November	63°F	40°F	4.5 in	0.00 in	8
December	55°F	35°F	4.9 in	0.20 in	9

NOAA U.S. Climate Normals 1991–2020, Mableton 1 N, Ga Us (7.2 mi away, 980 ft). Wet days: days with at least 0.01 in of precipitation.

What is the hottest month in Marietta?

July, with an average high of 84°F and low of 68°F.

What is the coldest month in Marietta?

January, with an average low of 32°F and high of 53°F.

When does it rain most in Marietta?

July is the wettest month, averaging 7.0 in of precipitation; the year totals about 56.1 inches.

Does it snow in Marietta?

Yes. Snowfall averages about 1 inches a year, mostly in January and February.

What is the best time to visit Marietta?

For mild weather (highs between 65°F and 85°F) with the least rain, April, June, September.

Where do these numbers come from?

NOAA’s 1991–2020 U.S. Climate Normals for the Mableton 1 N weather station, 7.2 miles from downtown: 30-year averages, not a forecast.