Weather on March 21
Dayton, OH
55 Years of Data
Avg High
54°F
Avg Low
34°F
Warmest
2012
74°F avg
Coldest
1986
22°F avg
About This Date
March 21st in Dayton, OH typically brings cool spring weather, with average highs around 54°F and lows near 34°F. Over 56 years of records, the warmest March 21st was in 2012 (74°F average), while the coldest was 1986 (22°F) — a 52°F range across recorded history. Rain or other precipitation has occurred on about 41% of March 21st dates historically, with the wettest March 21st recording 3.78" of rain. The last decade has been 1.0°F cooler on this date compared to 20-30 years ago.
The last decade has been 1.0°F cooler on this date compared to 20-30 years ago.
Planning for March 21st in Dayton, OH? Bring layers as temperatures can vary throughout the day. Consider bringing rain gear or an umbrella.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026 | 69° | 40° | 54° | — | — |
| 2025 | 54° | 25° | 40° | — | — |
| 2024 | 43° | 21° | 32° | — | — |
| 2023 | 59° | 34° | 46° | 0.05" | — |
| 2022 | 71° | 40° | 55° | — | — |
| 2021 | 49° | 33° | 41° | — | — |
| 2020 | 73° | 31° | 52° | — | — |
| 2019 | 46° | 29° | 37° | 0.23" | — |
| 2018 | 44° | 27° | 35° | 0.51" | — |
| 2017 | 55° | 37° | 46° | 3.78" | — |
| 2016 | 46° | 29° | 37° | — | — |
| 2015 | 46° | 38° | 42° | 0.03" | — |
| 2014 | 51° | 34° | 42° | — | — |
| 2013 | 36° | 19° | 27° | — | — |
| 2012warmest | 87° | 60° | 74° | — | — |
| 2011 | 64° | 39° | 52° | 0.2" | — |
| 2010 | 69° | 37° | 53° | — | — |
| 2009 | 45° | 29° | 37° | — | — |
| 2008 | 51° | 32° | 42° | — | — |
| 2007 | 52° | 40° | 46° | — | — |
| 2006 | 42° | 26° | 34° | — | — |
| 2005 | 41° | 28° | 35° | — | — |
| 2004 | 69° | 32° | 51° | 0.25" | — |
| 2003 | 72° | 52° | 62° | 1.12" | — |
| 2002 | 46° | 34° | 40° | 0.1" | — |
| 2001 | 54° | 39° | 46° | — | — |
| 2000 | 50° | 44° | 47° | 0.48" | — |
| 1999 | 55° | 28° | 42° | — | — |
| 1998 | 41° | 31° | 36° | 1.19" | — |
| 1997 | 72° | 39° | 55° | — | — |
| 1996 | 32° | 25° | 28° | 0.2" | — |
| 1995 | 73° | 43° | 58° | 0.3" | — |
| 1994 | 64° | 38° | 51° | 0.28" | — |
| 1993 | 41° | 35° | 38° | 0.36" | — |
| 1992 | 48° | 26° | 37° | 0.03" | — |
| 1991 | 63° | 37° | 50° | — | — |
| 1990 | 42° | 23° | 33° | — | — |
| 1989 | 42° | 30° | 36° | 1.85" | — |
| 1988 | 39° | 25° | 32° | — | — |
| 1987 | 62° | 31° | 46° | — | — |
| 1986coldest | 26° | 17° | 22° | — | — |
| 1985 | 60° | 30° | 45° | — | — |
| 1984 | 55° | 32° | 44° | 2.82" | — |
| 1983 | 41° | 31° | 36° | 1.24" | — |
| 1982 | 63° | 40° | 51° | 0.08" | — |
| 1981 | 36° | 29° | 32° | — | — |
| 1980 | 55° | 37° | 46° | 1.65" | — |
| 1979 | 69° | 51° | 60° | — | — |
| 1978 | 67° | 34° | 50° | — | — |
| 1977 | 42° | 30° | 36° | — | — |
| 1976 | 70° | 50° | 60° | 2.08" | — |
| 1975 | 63° | 40° | 51° | — | — |
| 1974 | 51° | 34° | 42° | 1.19" | — |
| 1973 | 42° | 27° | 34° | — | — |
| 1972 | 68° | 41° | 55° | — | — |
| 1971 | 37° | 28° | 33° | — | — |
56 years of data from DAYTON MCD