McDonough weather by month
What a typical year looks like in McDonough, Georgia: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at JONESBORO, 21 km from McDonough; records cover 1994–2026.
The year at a glance
- Precipitation a year
- 52.9 in1344 mm
- Snow a year
- 0.8 in2 cm
- Last spring freeze
- Mar 23
- First fall freeze
- Nov 14
- Heating degree days
- 2,972
- Cooling degree days
- 1,786
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are 18°−8° (heating, 99%) and 98°36° (cooling, 1%).
Month by month
McDonough in January
Highs average 53°12° and lows 32°0°, with 5 in128 mm of precipitation and 0.5 in1.3 cm of snow in a typical January.
- Record high
- 77°25° (2002)
- Record low
- 5°−15° (2014)
- Heating degree days
- 698
- Cooling degree days
- 0
McDonough in February
Highs average 57°14° and lows 35°2°, with 4.9 in123 mm of precipitation in a typical February.
- Record high
- 81°27° (2023)
- Record low
- 6°−14° (1996)
- Heating degree days
- 535
- Cooling degree days
- 0
McDonough in March
Highs average 65°18° and lows 42°5°, with 5 in126 mm of precipitation and 0.1 in0.3 cm of snow in a typical March.
- Record high
- 89°32° (2007)
- Record low
- 14°−10° (1996)
- Heating degree days
- 372
- Cooling degree days
- 8
McDonough in April
Highs average 73°23° and lows 49°10°, with 4.2 in106 mm of precipitation in a typical April.
- Record high
- 92°33° (2001)
- Record low
- 29°−2° (2007)
- Heating degree days
- 164
- Cooling degree days
- 46
McDonough in May
Highs average 81°27° and lows 59°15°, with 3.5 in88 mm of precipitation in a typical May.
- Record high
- 95°35° (2006)
- Record low
- 37°3° (2005)
- Heating degree days
- 33
- Cooling degree days
- 177
McDonough in June
Highs average 87°30° and lows 67°19°, with 4.6 in117 mm of precipitation in a typical June.
- Record high
- 103°39° (2012)
- Record low
- 50°10° (2008)
- Heating degree days
- 2
- Cooling degree days
- 349
McDonough in July
Highs average 90°32° and lows 70°21°, with 5.1 in129 mm of precipitation in a typical July.
- Record high
- 104°40° (2012)
- Record low
- 57°14° (1998)
- Heating degree days
- 0
- Cooling degree days
- 459
McDonough in August
Highs average 89°31° and lows 69°21°, with 4.4 in112 mm of precipitation in a typical August.
- Record high
- 104°40° (1999)
- Record low
- 56°13° (2025)
- Heating degree days
- 0
- Cooling degree days
- 428
McDonough in September
Highs average 83°28° and lows 63°17°, with 3.6 in90 mm of precipitation in a typical September.
- Record high
- 100°38° (2026)
- Record low
- 42°6° (2001)
- Heating degree days
- 10
- Cooling degree days
- 258
McDonough in OctoberThis month
Highs average 73°23° and lows 52°11°, with 3.6 in92 mm of precipitation in a typical October.
- Record high
- 98°37° (2019)
- Record low
- 29°−2° (2001)
- Heating degree days
- 135
- Cooling degree days
- 57
McDonough in November
Highs average 62°17° and lows 41°5°, with 4.2 in106 mm of precipitation in a typical November.
- Record high
- 86°30° (2016)
- Record low
- 19°−7° (2014)
- Heating degree days
- 404
- Cooling degree days
- 4
McDonough in December
Highs average 55°13° and lows 35°2°, with 5 in126 mm of precipitation and 0.2 in0.5 cm of snow in a typical December.
- Record high
- 78°26° (2022)
- Record low
- 7°−14° (2022)
- Heating degree days
- 619
- Cooling degree days
- 0