Weather on October 21
Dayton, OH
55 Years of Data
Avg High
63°F
Avg Low
42°F
Warmest
1979
72°F avg
Coldest
1974
34°F avg
About This Date
October 21st in Dayton, OH typically brings mild fall weather, with average highs around 63°F and lows near 42°F. Over 55 years of records, the warmest October 21st was in 1979 (72°F average), while the coldest was 1974 (34°F) — a 38°F range across recorded history. Rain or other precipitation has occurred on about 31% of October 21st dates historically, with the wettest October 21st recording 3.12" of rain. The last decade has been 4.6°F warmer on this date compared to 20-30 years ago.
The last decade has been 4.6°F warmer on this date compared to 20-30 years ago.
Planning for October 21st in Dayton, OH? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
Warming Trend
1.1°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 64° | 48° | 56° | 0.05" | — |
| 2024 | 76° | 46° | 61° | — | — |
| 2023 | 60° | 39° | 50° | 0.03" | — |
| 2022 | 72° | 45° | 58° | — | — |
| 2021 | 72° | 52° | 62° | — | — |
| 2020 | 68° | 50° | 59° | 0.13" | — |
| 2019 | 80° | 55° | 68° | — | — |
| 2018 | 57° | 32° | 45° | — | — |
| 2017 | 79° | 48° | 63° | — | — |
| 2016 | 61° | 45° | 53° | 1.19" | — |
| 2015 | 72° | 46° | 59° | — | — |
| 2014 | 60° | 46° | 53° | 1.32" | — |
| 2013 | 60° | 36° | 48° | — | — |
| 2012 | 58° | 35° | 46° | — | — |
| 2011 | 44° | 41° | 43° | 0.63" | — |
| 2010 | 69° | 40° | 54° | — | — |
| 2009 | 72° | 42° | 57° | — | — |
| 2008 | 68° | 36° | 52° | — | — |
| 2007 | 71° | 53° | 62° | — | — |
| 2006 | 51° | 38° | 44° | — | — |
| 2005 | 55° | 44° | 50° | 0.91" | — |
| 2004 | 60° | 48° | 54° | — | — |
| 2003 | 78° | 44° | 61° | — | — |
| 2002 | 54° | 36° | 45° | — | — |
| 2001 | 71° | 43° | 57° | — | — |
| 2000 | 76° | 47° | 61° | — | — |
| 1999 | 63° | 38° | 50° | — | — |
| 1998 | 63° | 44° | 53° | — | — |
| 1997 | 62° | 38° | 50° | — | — |
| 1996 | 54° | 42° | 48° | — | — |
| 1995 | 64° | 41° | 53° | 0.69" | — |
| 1994 | 71° | 46° | 59° | — | — |
| 1993 | 69° | 50° | 60° | 1.63" | — |
| 1992 | 50° | 35° | 43° | 0.05" | — |
| 1991 | 55° | 31° | 43° | — | — |
| 1990 | 66° | 39° | 53° | — | — |
| 1989 | 38° | 34° | 36° | — | — |
| 1988 | 55° | 38° | 46° | 0.3" | — |
| 1987 | 53° | 32° | 43° | — | — |
| 1986 | 67° | 38° | 52° | — | — |
| 1985 | 57° | 50° | 54° | 1.93" | — |
| 1984 | 67° | 43° | 55° | 1.12" | — |
| 1983 | 51° | 46° | 49° | 3.12" | — |
| 1982 | 59° | 40° | 49° | 0.3" | — |
| 1981 | 68° | 41° | 55° | — | — |
| 1980 | 61° | 42° | 51° | 0.03" | — |
| 1979warmest | 80° | 64° | 72° | — | — |
| 1978 | 69° | 43° | 56° | — | — |
| 1977 | 62° | 41° | 52° | — | — |
| 1976 | 47° | 35° | 41° | 0.84" | — |
| 1975 | 62° | 49° | 55° | — | — |
| 1974coldest | 42° | 27° | 34° | — | — |
| 1973 | 65° | 40° | 52° | — | — |
| 1972 | 53° | 33° | 43° | — | — |
| 1971 | 81° | 60° | 70° | — | — |
55 years of data from DAYTON MCD