Harriman weather by month
What a typical year looks like in Harriman, Tennessee: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Kingston, 9 km from Harriman; records cover 2000–2026.
The year at a glance
- Precipitation a year
- 58.8 in1494 mm
- Snow a year
- 1.8 in4.6 cm
- Last spring freeze
- Apr 6
- First fall freeze
- Nov 2
- Heating degree days
- 3,832
- Cooling degree days
- 1,459
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are 13°−11° (heating, 99%) and 95°35° (cooling, 1%).
Month by month
Harriman in January
Highs average 46°8° and lows 28°−2°, with 5.5 in139 mm of precipitation and 1.1 in2.8 cm of snow in a typical January.
- Record high
- 74°23° (2022)
- Record low
- 0°−18° (2014)
- Heating degree days
- 865
- Cooling degree days
- 0
Harriman in February
Highs average 51°11° and lows 30°−1°, with 6 in151 mm of precipitation and 0.6 in1.5 cm of snow in a typical February.
- Record high
- 81°27° (2023)
- Record low
- 3°−16° (2015)
- Heating degree days
- 678
- Cooling degree days
- 0
Harriman in March
Highs average 61°16° and lows 37°3°, with 5.4 in136 mm of precipitation in a typical March.
- Record high
- 86°30° (2007)
- Record low
- 15°−9° (2009)
- Heating degree days
- 503
- Cooling degree days
- 2
Harriman in April
Highs average 70°21° and lows 46°8°, with 5.5 in139 mm of precipitation in a typical April.
- Record high
- 89°32° (2001)
- Record low
- 25°−4° (2007)
- Heating degree days
- 235
- Cooling degree days
- 25
Harriman in May
Highs average 78°26° and lows 56°13°, with 4.7 in118 mm of precipitation in a typical May.
- Record high
- 94°34° (2006)
- Record low
- 32°0° (2020)
- Heating degree days
- 63
- Cooling degree days
- 122
Harriman in June
Highs average 85°29° and lows 64°18°, with 4.7 in120 mm of precipitation in a typical June.
- Record high
- 104°40° (2012)
- Record low
- 47°8° (2015)
- Heating degree days
- 2
- Cooling degree days
- 290
Harriman in July
Highs average 88°31° and lows 68°20°, with 5.2 in132 mm of precipitation in a typical July.
- Record high
- 106°41° (2012)
- Record low
- 54°12° (2014)
- Heating degree days
- 0
- Cooling degree days
- 398
Harriman in August
Highs average 87°31° and lows 67°19°, with 3.9 in99 mm of precipitation in a typical August.
- Record high
- 102°39° (2007)
- Record low
- 53°12° (2015)
- Heating degree days
- 0
- Cooling degree days
- 371
Harriman in September
Highs average 82°28° and lows 61°16°, with 4.3 in108 mm of precipitation in a typical September.
- Record high
- 99°37° (2011)
- Record low
- 40°4° (2001)
- Heating degree days
- 17
- Cooling degree days
- 213
Harriman in OctoberThis month
Highs average 72°22° and lows 48°9°, with 3.2 in82 mm of precipitation in a typical October.
- Record high
- 95°35° (2019)
- Record low
- 29°−2° (2013)
- Heating degree days
- 195
- Cooling degree days
- 37
Harriman in November
Highs average 59°15° and lows 37°3°, with 4.5 in115 mm of precipitation in a typical November.
- Record high
- 84°29° (2016)
- Record low
- 16°−9° (2016)
- Heating degree days
- 508
- Cooling degree days
- 1
Harriman in December
Highs average 49°9° and lows 32°0°, with 6.1 in154 mm of precipitation and 0.1 in0.3 cm of snow in a typical December.
- Record high
- 75°24° (2015)
- Record low
- 3°−16° (2022)
- Heating degree days
- 766
- Cooling degree days
- 0