Altamont weather by month
What a typical year looks like in Altamont, Tennessee: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Coalmont, 8 km from Altamont; records cover 1999–2026.
The year at a glance
- Precipitation a year
- 63.2 in1605 mm
- Snow a year
- Rare
- Last spring freeze
- Apr 22
- First fall freeze
- Oct 17
- Heating degree days
- 4,477
- Cooling degree days
- 820
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are 7°−14° (heating, 99%) and 91°33° (cooling, 1%).
Month by month
Altamont in January
Highs average 45°7° and lows 26°−4°, with 5.8 in146 mm of precipitation in a typical January.
- Record high
- 72°22° (2002)
- Record low
- −13°−25° (2024)
- Heating degree days
- 916
- Cooling degree days
- 0
Altamont in February
Highs average 49°9° and lows 28°−2°, with 5.5 in141 mm of precipitation in a typical February.
- Record high
- 78°26° (2023)
- Record low
- −4°−20° (2015)
- Heating degree days
- 745
- Cooling degree days
- 0
Altamont in March
Highs average 57°14° and lows 35°1°, with 6.1 in156 mm of precipitation in a typical March.
- Record high
- 83°28° (2007)
- Record low
- 8°−13° (2002)
- Heating degree days
- 591
- Cooling degree days
- 1
Altamont in April
Highs average 66°19° and lows 42°6°, with 6.2 in156 mm of precipitation in a typical April.
- Record high
- 85°29° (2025)
- Record low
- 18°−8° (2007)
- Heating degree days
- 326
- Cooling degree days
- 8
Altamont in May
Highs average 74°23° and lows 52°11°, with 5.1 in129 mm of precipitation in a typical May.
- Record high
- 88°31° (2011)
- Record low
- 24°−4° (2013)
- Heating degree days
- 123
- Cooling degree days
- 49
Altamont in June
Highs average 80°27° and lows 60°15°, with 5.3 in134 mm of precipitation in a typical June.
- Record high
- 100°38° (2012)
- Record low
- 41°5° (2000)
- Heating degree days
- 14
- Cooling degree days
- 160
Altamont in July
Highs average 83°28° and lows 63°17°, with 6.1 in155 mm of precipitation in a typical July.
- Record high
- 98°37° (2012)
- Record low
- 47°8° (2008)
- Heating degree days
- 2
- Cooling degree days
- 256
Altamont in August
Highs average 83°28° and lows 62°16°, with 4.3 in108 mm of precipitation in a typical August.
- Record high
- 98°37° (2007)
- Record low
- 44°7° (2004)
- Heating degree days
- 4
- Cooling degree days
- 227
Altamont in September
Highs average 78°26° and lows 55°13°, with 4.2 in108 mm of precipitation in a typical September.
- Record high
- 95°35° (1999)
- Record low
- 32°0° (1999)
- Heating degree days
- 57
- Cooling degree days
- 105
Altamont in OctoberThis month
Highs average 68°20° and lows 43°6°, with 3.5 in88 mm of precipitation in a typical October.
- Record high
- 92°33° (2019)
- Record low
- 21°−6° (2001)
- Heating degree days
- 298
- Cooling degree days
- 13
Altamont in November
Highs average 57°14° and lows 34°1°, with 4.8 in123 mm of precipitation in a typical November.
- Record high
- 82°28° (2003)
- Record low
- 10°−12° (2008)
- Heating degree days
- 577
- Cooling degree days
- 1
Altamont in December
Highs average 48°9° and lows 29°−2°, with 6.4 in162 mm of precipitation in a typical December.
- Record high
- 71°22° (2007)
- Record low
- −5°−21° (2022)
- Heating degree days
- 824
- Cooling degree days
- 0