Weather on May 18
Knoxville, TN
55 Years of Data
Avg High
78°F
Avg Low
55°F
Warmest
2018
78°F avg
Coldest
2009
49°F avg
About This Date
May 18th in Knoxville, TN typically brings pleasant spring weather, with average highs around 78°F and lows near 55°F. Over 55 years of records, the warmest May 18th was in 2018 (78°F average), while the coldest was 2009 (49°F) — a 29°F range across recorded history. Rain or other precipitation has occurred on about 31% of May 18th dates historically, with the wettest May 18th recording 3.96" of rain. The last decade has been 1.2°F warmer on this date compared to 20-30 years ago.
The last decade has been 1.2°F warmer on this date compared to 20-30 years ago.
Planning for May 18th in Knoxville, TN? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
Warming Trend
0.3°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 82° | 59° | 71° | — | — |
| 2024 | 79° | 54° | 66° | — | — |
| 2023 | 80° | 62° | 71° | — | — |
| 2022 | 80° | 55° | 68° | — | — |
| 2021 | 78° | 41° | 60° | — | — |
| 2020 | 86° | 55° | 71° | — | — |
| 2019 | 85° | 57° | 71° | — | — |
| 2018warmest | 90° | 67° | 78° | — | — |
| 2017 | 90° | 61° | 75° | — | — |
| 2016 | 78° | 55° | 67° | — | — |
| 2015 | 79° | 63° | 71° | 0.41" | — |
| 2014 | 61° | 49° | 55° | — | — |
| 2013 | 81° | 59° | 70° | 0.69" | — |
| 2012 | 83° | 58° | 70° | — | — |
| 2011 | 53° | 47° | 50° | 0.13" | — |
| 2010 | 78° | 59° | 69° | 1.42" | — |
| 2009coldest | 59° | 40° | 49° | 0.05" | — |
| 2008 | 73° | 54° | 63° | — | — |
| 2007 | 72° | 47° | 59° | — | — |
| 2006 | 70° | 51° | 60° | — | — |
| 2005 | 80° | 50° | 65° | — | — |
| 2004 | 84° | 62° | 73° | 1.27" | — |
| 2003 | 82° | 62° | 72° | 0.25" | — |
| 2002 | 82° | 47° | 64° | 1.47" | — |
| 2001 | 89° | 62° | 76° | — | — |
| 2000 | 76° | 56° | 66° | — | — |
| 1999 | 77° | 55° | 66° | — | — |
| 1998 | 85° | 54° | 69° | — | — |
| 1997 | 78° | 50° | 64° | — | — |
| 1996 | 84° | 58° | 71° | — | — |
| 1995 | 83° | 62° | 72° | — | — |
| 1994 | 74° | 47° | 60° | — | — |
| 1993 | 81° | 61° | 71° | — | — |
| 1992 | 84° | 57° | 71° | — | — |
| 1991 | 85° | 64° | 74° | — | — |
| 1990 | 76° | 47° | 61° | 0.03" | — |
| 1989 | 76° | 49° | 62° | — | — |
| 1988 | 77° | 49° | 63° | — | — |
| 1987 | 87° | 58° | 72° | — | — |
| 1986 | 88° | 60° | 74° | — | — |
| 1985 | 66° | 50° | 58° | 0.28" | — |
| 1984 | 72° | 42° | 57° | — | — |
| 1983 | 76° | 56° | 66° | 1.47" | — |
| 1982 | 86° | 62° | 74° | 0.76" | — |
| 1981 | 67° | 57° | 62° | 0.15" | — |
| 1980 | 67° | 58° | 62° | 3.96" | — |
| 1979 | 78° | 47° | 62° | 0.13" | — |
| 1978 | 73° | 50° | 62° | — | — |
| 1977 | 89° | 61° | 75° | — | — |
| 1976 | 73° | 55° | 64° | 0.3" | — |
| 1975 | 79° | 65° | 72° | 0.05" | — |
| 1974 | 86° | 62° | 74° | — | — |
| 1973 | 63° | 39° | 51° | — | — |
| 1972 | 77° | 55° | 66° | — | — |
| 1971 | 84° | 57° | 71° | — | — |
55 years of data from KNOXVILLE UNIV OF TENN