Weather on October 21
Knoxville, TN
55 Years of Data
Avg High
68°F
Avg Low
43°F
Warmest
2016
78°F avg
Coldest
1989
40°F avg
About This Date
October 21st in Knoxville, TN typically brings mild fall weather, with average highs around 68°F and lows near 43°F — a 25°F daily swing. Over 55 years of records, the warmest October 21st was in 2016 (78°F average), while the coldest was 1989 (40°F) — a 38°F range across recorded history. Rain or other precipitation has occurred on about 16% of October 21st dates historically, with the wettest October 21st recording 1.63" of rain. Temperatures on this date have remained relatively stable over the past several decades.
Temperatures on this date have remained relatively stable over the past several decades.
Planning for October 21st in Knoxville, TN? Great weather for outdoor activities.
Warming Trend
0.3°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 71° | 39° | 55° | — | — |
| 2024 | 77° | 39° | 58° | — | — |
| 2023 | 70° | 46° | 58° | — | — |
| 2022 | 62° | 30° | 46° | — | — |
| 2021 | 72° | 43° | 57° | — | — |
| 2020 | 70° | 50° | 60° | — | — |
| 2019 | 68° | 50° | 59° | — | — |
| 2018 | 65° | 40° | 52° | 1.63" | — |
| 2017 | 76° | 41° | 58° | — | — |
| 2016warmest | 93° | 63° | 78° | — | — |
| 2015 | 67° | 36° | 51° | — | — |
| 2014 | 67° | 46° | 56° | — | — |
| 2013 | 65° | 36° | 50° | — | — |
| 2012 | 64° | 39° | 52° | — | — |
| 2011 | 52° | 45° | 48° | — | — |
| 2010 | 71° | 42° | 57° | — | — |
| 2009 | 67° | 36° | 51° | — | — |
| 2008 | 67° | 40° | 53° | — | — |
| 2007 | 73° | 42° | 58° | — | — |
| 2006 | 57° | 36° | 46° | — | — |
| 2005 | 84° | 55° | 70° | — | — |
| 2004 | 75° | 58° | 66° | — | — |
| 2003 | 77° | 45° | 61° | — | — |
| 2002 | 65° | 56° | 60° | 0.2" | — |
| 2001 | 74° | 43° | 58° | — | — |
| 2000 | 76° | 47° | 61° | — | — |
| 1999 | 63° | 41° | 52° | — | — |
| 1998 | 70° | 42° | 56° | — | — |
| 1997 | 67° | 42° | 54° | — | — |
| 1996 | 64° | 31° | 47° | — | — |
| 1995 | 66° | 35° | 51° | 1.02" | — |
| 1994 | 70° | 50° | 60° | — | — |
| 1993 | 83° | 58° | 70° | 0.46" | — |
| 1992 | 65° | 33° | 49° | — | — |
| 1991 | 69° | 42° | 56° | — | — |
| 1990 | 69° | 36° | 52° | — | — |
| 1989coldest | 44° | 36° | 40° | — | — |
| 1988 | 59° | 36° | 47° | 0.74" | — |
| 1987 | 54° | 29° | 41° | — | — |
| 1986 | 69° | 38° | 53° | — | — |
| 1985 | 82° | 64° | 73° | — | — |
| 1984 | 80° | 63° | 71° | 0.03" | — |
| 1983 | 65° | 53° | 59° | 0.69" | — |
| 1982 | 61° | 33° | 47° | — | — |
| 1981 | 68° | 39° | 54° | — | — |
| 1980 | 64° | 42° | 53° | — | — |
| 1979 | 82° | 55° | 69° | — | — |
| 1978 | 68° | 43° | 55° | — | — |
| 1977 | 63° | 43° | 53° | — | — |
| 1976 | 55° | 40° | 47° | 0.1" | — |
| 1975 | 65° | 41° | 53° | — | — |
| 1974 | 63° | 32° | 47° | — | — |
| 1973 | 76° | 40° | 58° | — | — |
| 1972 | 55° | 38° | 46° | — | — |
| 1971 | 80° | 61° | 70° | 0.13" | — |
55 years of data from KNOXVILLE UNIV OF TENN