Weather on June 21
Knoxville, TN
55 Years of Data
Avg High
86°F
Avg Low
64°F
Warmest
2018
82°F avg
Coldest
1999
65°F avg
About This Date
June 21st in Knoxville, TN typically brings warm summer weather, with average highs around 86°F and lows near 64°F. Over 55 years of records, the warmest June 21st was in 2018 (82°F average), while the coldest was 1999 (65°F) — a 17°F range across recorded history. Rain or other precipitation has occurred on about 27% of June 21st dates historically, with the wettest June 21st recording 4.78" of rain. The last decade has been 2.8°F warmer on this date compared to 20-30 years ago.
The last decade has been 2.8°F warmer on this date compared to 20-30 years ago.
Planning for June 21st in Knoxville, TN? Stay hydrated and seek shade during peak afternoon hours.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 92° | 63° | 77° | — | — |
| 2024 | 93° | 64° | 79° | — | — |
| 2023 | 79° | 68° | 73° | 0.25" | — |
| 2022 | 90° | 55° | 72° | — | — |
| 2021 | 90° | 70° | 80° | — | — |
| 2020 | 90° | 62° | 76° | — | — |
| 2019 | 79° | 61° | 70° | — | — |
| 2018warmest | 92° | 72° | 82° | — | — |
| 2017 | 85° | 66° | 75° | — | — |
| 2016 | 88° | 64° | 76° | — | — |
| 2015 | 92° | 68° | 80° | — | — |
| 2014 | 92° | 69° | 80° | — | — |
| 2013 | 84° | 68° | 76° | — | — |
| 2012 | 92° | 68° | 80° | — | — |
| 2011 | 85° | 65° | 75° | — | — |
| 2010 | 92° | 66° | 79° | — | — |
| 2009 | 93° | 70° | 81° | 1.4" | — |
| 2008 | 80° | 61° | 70° | — | — |
| 2007 | 87° | 54° | 70° | — | — |
| 2006 | 90° | 65° | 77° | — | — |
| 2005 | 81° | 59° | 70° | 4.78" | — |
| 2004 | 84° | 66° | 75° | — | — |
| 2003 | 79° | 51° | 65° | — | — |
| 2002 | 91° | 61° | 76° | — | — |
| 2001 | 90° | 65° | 77° | 0.25" | — |
| 2000 | 86° | 68° | 77° | 0.18" | — |
| 1999coldest | 77° | 53° | 65° | — | — |
| 1998 | 85° | 63° | 74° | — | — |
| 1997 | 88° | 63° | 75° | — | — |
| 1996 | 89° | 66° | 78° | — | — |
| 1995 | 78° | 58° | 68° | 0.05" | — |
| 1994 | 90° | 68° | 79° | — | — |
| 1993 | 88° | 65° | 76° | 0.13" | — |
| 1992 | 85° | 62° | 73° | 0.36" | — |
| 1991 | 87° | 68° | 78° | — | — |
| 1990 | 89° | 60° | 75° | — | — |
| 1989 | 79° | 62° | 70° | — | — |
| 1988 | 92° | 63° | 77° | 0.03" | — |
| 1987 | 84° | 69° | 77° | — | — |
| 1986 | 92° | 67° | 79° | — | — |
| 1985 | 83° | 51° | 67° | — | — |
| 1984 | 92° | 68° | 80° | 0.03" | — |
| 1983 | 86° | 62° | 74° | — | — |
| 1982 | 83° | 60° | 71° | — | — |
| 1981 | 87° | 68° | 78° | 0.84" | — |
| 1980 | 81° | 64° | 72° | — | — |
| 1979 | 89° | 70° | 79° | — | — |
| 1978 | 84° | 66° | 75° | 0.36" | — |
| 1977 | 84° | 67° | 75° | 2.21" | — |
| 1976 | 83° | 59° | 71° | — | — |
| 1975 | 88° | 64° | 76° | 0.51" | — |
| 1974 | 86° | 73° | 80° | — | — |
| 1973 | 87° | 69° | 78° | 0.89" | — |
| 1972 | 80° | 68° | 74° | — | — |
| 1971 | 80° | 66° | 73° | — | — |
55 years of data from KNOXVILLE UNIV OF TENN