Marietta weather by month
What a typical year looks like in Marietta, Georgia: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at DALLAS 7 NE, 20 km from Marietta; records cover 1957–2026.
The year at a glance
- Precipitation a year
- 54.3 in1379 mm
- Snow a year
- 4 in10 cm
- Last spring freeze
- Apr 8
- First fall freeze
- Oct 30
- Heating degree days
- 3,095
- Cooling degree days
- 1,724
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are 15°−9° (heating, 99%) and 97°36° (cooling, 1%).
Month by month
Marietta in January
Highs average 53°11° and lows 31°0°, with 4.9 in124 mm of precipitation and 0.8 in2 cm of snow in a typical January.
- Record high
- 80°27° (2002)
- Record low
- −12°−24° (1985)
- Heating degree days
- 718
- Cooling degree days
- 0
Marietta in February
Highs average 57°14° and lows 34°1°, with 5.1 in130 mm of precipitation and 0.7 in1.8 cm of snow in a typical February.
- Record high
- 83°28° (2018)
- Record low
- −2°−19° (1996)
- Heating degree days
- 548
- Cooling degree days
- 1
Marietta in March
Highs average 65°18° and lows 40°5°, with 5.1 in131 mm of precipitation and 1.2 in3 cm of snow in a typical March.
- Record high
- 90°32° (2020)
- Record low
- 7°−14° (1960)
- Heating degree days
- 394
- Cooling degree days
- 11
Marietta in April
Highs average 74°23° and lows 48°9°, with 4.3 in110 mm of precipitation and 0.1 in0.3 cm of snow in a typical April.
- Record high
- 93°34° (1986)
- Record low
- 21°−6° (1987)
- Heating degree days
- 176
- Cooling degree days
- 47
Marietta in May
Highs average 81°27° and lows 57°14°, with 4 in102 mm of precipitation in a typical May.
- Record high
- 96°36° (1996)
- Record low
- 32°0° (1966)
- Heating degree days
- 46
- Cooling degree days
- 158
Marietta in June
Highs average 87°31° and lows 65°18°, with 4.7 in118 mm of precipitation in a typical June.
- Record high
- 104°40° (2012)
- Record low
- 40°4° (1984)
- Heating degree days
- 2
- Cooling degree days
- 331
Marietta in July
Highs average 90°32° and lows 68°20°, with 4.8 in121 mm of precipitation in a typical July.
- Record high
- 104°40° (1980)
- Record low
- 50°10° (1967)
- Heating degree days
- 0
- Cooling degree days
- 440
Marietta in August
Highs average 89°32° and lows 68°20°, with 4.2 in106 mm of precipitation in a typical August.
- Record high
- 104°40° (2007)
- Record low
- 48°9° (1968)
- Heating degree days
- 0
- Cooling degree days
- 417
Marietta in September
Highs average 85°29° and lows 61°16°, with 4.4 in112 mm of precipitation in a typical September.
- Record high
- 100°38° (2019)
- Record low
- 30°−1° (1967)
- Heating degree days
- 12
- Cooling degree days
- 251
Marietta in OctoberThis month
Highs average 75°24° and lows 50°10°, with 3.4 in86 mm of precipitation in a typical October.
- Record high
- 99°37° (2019)
- Record low
- 22°−6° (1962)
- Heating degree days
- 147
- Cooling degree days
- 59
Marietta in November
Highs average 64°18° and lows 39°4°, with 4.4 in112 mm of precipitation in a typical November.
- Record high
- 88°31° (2016)
- Record low
- 9°−13° (1970)
- Heating degree days
- 413
- Cooling degree days
- 7
Marietta in December
Highs average 55°13° and lows 34°1°, with 5 in127 mm of precipitation and 1 in2.5 cm of snow in a typical December.
- Record high
- 80°27° (2007)
- Record low
- −4°−20° (1962)
- Heating degree days
- 639
- Cooling degree days
- 2