Knoxville weather by month
What a typical year looks like in Knoxville, Pennsylvania: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Cowanesque Dam, 24 km from Knoxville; records cover 1993–2026.
The year at a glance
- Precipitation a year
- 36.9 in936 mm
- Snow a year
- 38 in97 cm
- Last spring freeze
- May 14
- First fall freeze
- Oct 8
- Heating degree days
- 6,966
- Cooling degree days
- 433
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are −8°−22° (heating, 99%) and 91°33° (cooling, 1%).
Month by month
Knoxville in January
Highs average 32°0° and lows 15°−10°, with 2.2 in55 mm of precipitation and 10 in24 cm of snow in a typical January.
- Record high
- 66°19° (1995)
- Record low
- −27°−33° (1996)
- Heating degree days
- 1289
- Cooling degree days
- 0
Knoxville in February
Highs average 35°2° and lows 15°−9°, with 1.7 in44 mm of precipitation and 9 in23 cm of snow in a typical February.
- Record high
- 69°21° (2017)
- Record low
- −20°−29° (2014)
- Heating degree days
- 1124
- Cooling degree days
- 0
Knoxville in March
Highs average 44°6° and lows 22°−6°, with 2.7 in68 mm of precipitation and 7 in17 cm of snow in a typical March.
- Record high
- 85°29° (1998)
- Record low
- −15°−26° (2003)
- Heating degree days
- 1003
- Cooling degree days
- 0
Knoxville in April
Highs average 57°14° and lows 33°0°, with 3.2 in81 mm of precipitation and 1.7 in4.3 cm of snow in a typical April.
- Record high
- 91°33° (2009)
- Record low
- 10°−12° (1995)
- Heating degree days
- 610
- Cooling degree days
- 2
Knoxville in May
Highs average 69°21° and lows 44°7°, with 3.2 in80 mm of precipitation in a typical May.
- Record high
- 95°35° (1996)
- Record low
- 20°−7° (2010)
- Heating degree days
- 290
- Cooling degree days
- 23
Knoxville in June
Highs average 77°25° and lows 53°12°, with 4.3 in108 mm of precipitation in a typical June.
- Record high
- 95°35° (1999)
- Record low
- 32°0° (2009)
- Heating degree days
- 80
- Cooling degree days
- 81
Knoxville in July
Highs average 81°27° and lows 58°14°, with 3.5 in89 mm of precipitation in a typical July.
- Record high
- 103°39° (2011)
- Record low
- 41°5° (1995)
- Heating degree days
- 18
- Cooling degree days
- 157
Knoxville in August
Highs average 80°27° and lows 57°14°, with 3.7 in93 mm of precipitation in a typical August.
- Record high
- 99°37° (2001)
- Record low
- 38°3° (1994)
- Heating degree days
- 28
- Cooling degree days
- 126
Knoxville in September
Highs average 73°23° and lows 50°10°, with 4 in101 mm of precipitation in a typical September.
- Record high
- 96°36° (2002)
- Record low
- 28°−2° (1993)
- Heating degree days
- 155
- Cooling degree days
- 41
Knoxville in OctoberThis month
Highs average 61°16° and lows 39°4°, with 3.4 in86 mm of precipitation and 0.2 in0.5 cm of snow in a typical October.
- Record high
- 85°29° (2007)
- Record low
- 17°−8° (2009)
- Heating degree days
- 479
- Cooling degree days
- 3
Knoxville in November
Highs average 48°9° and lows 30°−1°, with 2.7 in69 mm of precipitation and 2.3 in5.8 cm of snow in a typical November.
- Record high
- 76°24° (1994)
- Record low
- 3°−16° (2018)
- Heating degree days
- 790
- Cooling degree days
- 0
Knoxville in December
Highs average 37°3° and lows 22°−6°, with 2.5 in62 mm of precipitation and 9 in22 cm of snow in a typical December.
- Record high
- 70°21° (1998)
- Record low
- −15°−26° (1993)
- Heating degree days
- 1100
- Cooling degree days
- 0