Weather on April 21
Dayton, OH
55 Years of Data
Avg High
68°F
Avg Low
45°F
Warmest
1976
74°F avg
Coldest
1991
40°F avg
About This Date
April 21st in Dayton, OH typically brings mild spring weather, with average highs around 68°F and lows near 45°F. Over 55 years of records, the warmest April 21st was in 1976 (74°F average), while the coldest was 1991 (40°F) — a 34°F range across recorded history. Rain or other precipitation has occurred on about 51% of April 21st dates historically, with the wettest April 21st recording 5.66" of rain. The last decade has been 3.0°F cooler on this date compared to 20-30 years ago.
The last decade has been 3.0°F cooler on this date compared to 20-30 years ago.
Planning for April 21st in Dayton, OH? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
Cooling Trend
0.8°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 75° | 51° | 63° | 0.08" | — |
| 2024 | 52° | 37° | 44° | — | — |
| 2023 | 70° | 47° | 58° | 0.53" | — |
| 2022 | 68° | 53° | 61° | 0.66" | — |
| 2021 | 65° | 33° | 49° | 0.56" | — |
| 2020 | 67° | 40° | 53° | — | — |
| 2019 | 45° | 40° | 42° | 1.93" | — |
| 2018 | 59° | 34° | 46° | — | — |
| 2017 | 84° | 48° | 66° | 1.8" | — |
| 2016 | 84° | 55° | 70° | — | — |
| 2015 | 62° | 42° | 52° | 1.55" | — |
| 2014 | 80° | 45° | 62° | — | — |
| 2013 | 51° | 31° | 41° | — | — |
| 2012 | 78° | 41° | 60° | 1.17" | — |
| 2011 | 54° | 36° | 45° | 0.03" | — |
| 2010 | 68° | 42° | 55° | — | — |
| 2009 | 56° | 43° | 49° | 0.25" | — |
| 2008 | 60° | 47° | 53° | — | — |
| 2007 | 71° | 41° | 56° | — | — |
| 2006 | 82° | 56° | 69° | — | — |
| 2005 | 82° | 47° | 64° | 0.28" | — |
| 2004 | 71° | 54° | 62° | 0.74" | — |
| 2003 | 77° | 54° | 65° | 1.57" | — |
| 2002 | 68° | 43° | 55° | 0.1" | — |
| 2001 | 64° | 49° | 56° | 0.41" | — |
| 2000 | 81° | 44° | 62° | 2.21" | — |
| 1999 | 62° | 42° | 52° | 1.32" | — |
| 1998 | 65° | 40° | 52° | — | — |
| 1997 | 64° | 39° | 52° | — | — |
| 1996 | 76° | 48° | 62° | — | — |
| 1995 | 70° | 45° | 57° | 5.66" | — |
| 1994 | 69° | 46° | 58° | — | — |
| 1993 | 74° | 38° | 56° | 0.41" | — |
| 1992 | 82° | 63° | 72° | 0.66" | — |
| 1991coldest | 43° | 38° | 40° | 0.08" | — |
| 1990 | 71° | 55° | 63° | 4.45" | — |
| 1989 | 67° | 40° | 53° | — | — |
| 1988 | 62° | 36° | 49° | — | — |
| 1987 | 84° | 55° | 70° | — | — |
| 1986 | 59° | 50° | 55° | 1.52" | — |
| 1985 | 86° | 57° | 72° | — | — |
| 1984 | 57° | 37° | 47° | — | — |
| 1983 | 49° | 33° | 41° | — | — |
| 1982 | 61° | 36° | 48° | 0.03" | — |
| 1981 | 51° | 30° | 41° | — | — |
| 1980 | 76° | 49° | 62° | 0.43" | — |
| 1979 | 75° | 53° | 64° | — | — |
| 1978 | 48° | 38° | 43° | 0.15" | — |
| 1977 | 82° | 66° | 74° | 0.76" | — |
| 1976warmest | 87° | 60° | 74° | 0.2" | — |
| 1975 | 50° | 36° | 43° | — | — |
| 1974 | 77° | 42° | 60° | — | — |
| 1973 | 80° | 66° | 73° | — | — |
| 1972 | 62° | 42° | 52° | — | — |
| 1971 | 79° | 54° | 66° | — | — |
55 years of data from DAYTON MCD