Weather on March 21
Knoxville, TN
55 Years of Data
Avg High
61°F
Avg Low
38°F
Warmest
2012
69°F avg
Coldest
1996
31°F avg
About This Date
March 21st in Knoxville, TN typically brings mild spring weather, with average highs around 61°F and lows near 38°F. Over 56 years of records, the warmest March 21st was in 2012 (69°F average), while the coldest was 1996 (31°F) — a 38°F range across recorded history. Rain or other precipitation has occurred on about 46% of March 21st dates historically, with the wettest March 21st recording 5.61" of rain. The last decade has been 3.7°F cooler on this date compared to 20-30 years ago.
The last decade has been 3.7°F cooler on this date compared to 20-30 years ago.
Planning for March 21st in Knoxville, TN? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
Cooling Trend
0.6°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026 | 74° | 32° | 53° | — | — |
| 2025 | 58° | 30° | 44° | — | — |
| 2024 | 51° | 24° | 38° | — | — |
| 2023 | 54° | 22° | 38° | — | — |
| 2022 | 66° | 40° | 53° | — | — |
| 2021 | 60° | 34° | 47° | — | — |
| 2020 | 69° | 50° | 60° | 0.66" | — |
| 2019 | 62° | 32° | 47° | — | — |
| 2018 | 60° | 32° | 46° | — | — |
| 2017 | 65° | 33° | 49° | — | — |
| 2016 | 52° | 28° | 40° | 0.41" | — |
| 2015 | 54° | 46° | 50° | 0.18" | — |
| 2014 | 60° | 29° | 44° | — | — |
| 2013 | 56° | 24° | 40° | — | — |
| 2012warmest | 86° | 52° | 69° | 0.3" | — |
| 2011 | 76° | 51° | 63° | — | — |
| 2010 | 73° | 39° | 56° | — | — |
| 2009 | 58° | 28° | 43° | — | — |
| 2008 | 58° | 30° | 44° | — | — |
| 2007 | 69° | 49° | 59° | 0.3" | — |
| 2006 | 44° | 37° | 41° | 2.49" | — |
| 2005 | 57° | 30° | 44° | — | — |
| 2004 | 77° | 44° | 61° | 0.81" | — |
| 2003 | 69° | 48° | 59° | 0.03" | — |
| 2002 | 69° | 51° | 60° | 0.81" | — |
| 2001 | 47° | 38° | 42° | 0.36" | — |
| 2000 | 64° | 44° | 54° | 0.33" | — |
| 1999 | 68° | 42° | 55° | 1.47" | — |
| 1998 | 60° | 36° | 48° | 0.23" | — |
| 1997 | 64° | 37° | 51° | — | — |
| 1996coldest | 34° | 29° | 31° | 0.08" | — |
| 1995 | 75° | 44° | 60° | 1.19" | — |
| 1994 | 75° | 38° | 56° | 0.23" | — |
| 1993 | 44° | 38° | 41° | 0.33" | — |
| 1992 | 54° | 27° | 40° | — | — |
| 1991 | 68° | 38° | 53° | — | — |
| 1990 | 45° | 25° | 35° | — | — |
| 1989 | 55° | 43° | 49° | 2.87" | — |
| 1988 | 68° | 45° | 56° | — | — |
| 1987 | 69° | 31° | 50° | — | — |
| 1986 | 49° | 24° | 36° | — | — |
| 1985 | 69° | 34° | 51° | — | — |
| 1984 | 44° | 37° | 41° | 0.41" | — |
| 1983 | 39° | 32° | 36° | 0.05" | — |
| 1982 | 79° | 53° | 66° | 2.06" | — |
| 1981 | 49° | 28° | 38° | — | — |
| 1980 | 56° | 43° | 49° | 5.61" | — |
| 1979 | 75° | 58° | 66° | 0.03" | — |
| 1978 | 74° | 55° | 64° | — | — |
| 1977 | 66° | 43° | 54° | — | — |
| 1976 | 73° | 58° | 65° | 1.19" | — |
| 1975 | 69° | 46° | 58° | — | — |
| 1974 | 57° | 44° | 51° | 3.28" | — |
| 1973 | 53° | 37° | 45° | 1.55" | — |
| 1972 | 72° | 38° | 55° | — | — |
| 1971 | 43° | 29° | 36° | — | — |
56 years of data from KNOXVILLE UNIV OF TENN