Weather on December 21
Dayton, OH
55 Years of Data
Avg High
40°F
Avg Low
24°F
Warmest
2013
58°F avg
Coldest
1989
9°F avg
About This Date
December 21st in Dayton, OH typically brings chilly winter weather, with average highs around 40°F and lows near 24°F. Over 55 years of records, the warmest December 21st was in 2013 (58°F average), while the coldest was 1989 (9°F) — a 49°F range across recorded history. Precipitation has occurred on 42% of recorded December 21st dates, with snow falling 15% of the time (heaviest snowfall: 1.4"). The last decade has been 3.6°F warmer on this date compared to 20-30 years ago.
The last decade has been 3.6°F warmer on this date compared to 20-30 years ago.
Planning for December 21st in Dayton, OH? Bring layers as temperatures can vary throughout the day. Consider bringing rain gear or an umbrella.
Warming Trend
1.0°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 38° | 24° | 31° | — | — |
| 2024 | 31° | 21° | 26° | — | — |
| 2023 | 49° | 35° | 42° | — | — |
| 2022 | 41° | 21° | 31° | — | — |
| 2021 | 44° | 26° | 35° | — | — |
| 2020 | 44° | 36° | 40° | — | — |
| 2019 | 43° | 20° | 31° | — | — |
| 2018 | 47° | 39° | 43° | 1.83" | — |
| 2017 | 43° | 26° | 34° | — | — |
| 2016 | 36° | 17° | 26° | — | — |
| 2015 | 46° | 22° | 34° | 0.18" | — |
| 2014 | 31° | 20° | 25° | — | — |
| 2013warmest | 62° | 54° | 58° | 0.97" | — |
| 2012 | 32° | 28° | 30° | 0.25" | 1.4" |
| 2011 | 56° | 41° | 48° | 2.74" | — |
| 2010 | 35° | 25° | 30° | 0.03" | 0.2" |
| 2009 | 32° | 26° | 29° | 0.03" | — |
| 2008 | 32° | 16° | 24° | — | — |
| 2007 | 40° | 27° | 33° | — | — |
| 2006 | 52° | 26° | 39° | 0.43" | — |
| 2005 | 26° | 10° | 18° | — | — |
| 2004 | 46° | 19° | 33° | — | — |
| 2003 | 33° | 24° | 29° | — | — |
| 2002 | 43° | 35° | 39° | — | — |
| 2001 | 44° | 27° | 35° | — | — |
| 2000 | 24° | 12° | 18° | 0.1" | 1" |
| 1999 | 48° | 20° | 34° | 0.05" | — |
| 1998 | 52° | 39° | 45° | 0.05" | — |
| 1997 | 41° | 32° | 37° | — | — |
| 1996 | 18° | 12° | 15° | — | — |
| 1995 | 23° | 13° | 18° | — | — |
| 1994 | 51° | 30° | 41° | — | — |
| 1993 | 40° | 27° | 33° | 0.46" | — |
| 1992 | 33° | 22° | 27° | — | — |
| 1991 | 43° | 26° | 34° | 0.25" | — |
| 1990 | 56° | 35° | 45° | 0.08" | — |
| 1989coldest | 17° | 1° | 9° | 0.03" | 0.2" |
| 1988 | 58° | 36° | 47° | 0.15" | — |
| 1987 | 55° | 30° | 43° | 0.03" | — |
| 1986 | 39° | 29° | 34° | — | — |
| 1985 | 25° | 4° | 14° | 0.03" | 0.1" |
| 1984 | 41° | 34° | 37° | 0.64" | — |
| 1983 | 25° | 13° | 19° | 0.05" | 0.1" |
| 1982 | 33° | 30° | 32° | — | — |
| 1981 | 25° | 1° | 13° | 0.13" | 0.5" |
| 1980 | 20° | 6° | 13° | — | — |
| 1979 | 48° | 25° | 36° | — | — |
| 1978 | 61° | 30° | 45° | 0.76" | — |
| 1977 | 39° | 23° | 31° | — | — |
| 1976 | 36° | 9° | 22° | — | — |
| 1975 | 38° | 20° | 29° | — | — |
| 1974 | 40° | 26° | 33° | — | — |
| 1973 | 35° | 12° | 24° | 0.43" | 0.5" |
| 1972 | 42° | 39° | 41° | — | — |
| 1971 | 45° | 33° | 39° | — | — |
55 years of data from DAYTON MCD