Weather on March 21
New Haven, CT
55 Years of Data
Avg High
49°F
Avg Low
33°F
Warmest
2012
60°F avg
Coldest
1986
26°F avg
About This Date
March 21st in New Haven, CT typically brings chilly spring weather, with average highs around 49°F and lows near 33°F. Over 55 years of records, the warmest March 21st was in 2012 (60°F average), while the coldest was 1986 (26°F) — a 34°F range across recorded history. Precipitation has occurred on 31% of recorded March 21st dates, with snow falling 2% of the time. The last decade has been 3.9°F warmer on this date compared to 20-30 years ago.
The last decade has been 3.9°F warmer on this date compared to 20-30 years ago.
Planning for March 21st in New Haven, CT? Bring layers as temperatures can vary throughout the day. Consider bringing rain gear or an umbrella.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026 | 53° | 41° | 47° | — | — |
| 2025 | 52° | 42° | 47° | 0.51" | — |
| 2024 | 42° | 31° | 37° | — | — |
| 2023 | 59° | 28° | 44° | — | — |
| 2022 | 62° | 45° | 53° | — | — |
| 2021 | 58° | 26° | 42° | — | — |
| 2020 | 61° | 37° | 49° | — | — |
| 2019 | 48° | 35° | 42° | 0.61" | — |
| 2018 | 39° | 33° | 36° | 0.28" | — |
| 2017 | 50° | 32° | 41° | — | — |
| 2016 | 49° | 30° | 40° | 0.05" | — |
| 2015 | 41° | 28° | 35° | — | — |
| 2014 | 48° | 29° | 39° | — | — |
| 2013 | 39° | 31° | 35° | 0.03" | — |
| 2012warmest | 68° | 51° | 60° | — | — |
| 2011 | 42° | 34° | 38° | 0.53" | — |
| 2010 | 57° | 43° | 50° | — | — |
| 2009 | 44° | 24° | 34° | — | — |
| 2008 | 44° | 33° | 39° | — | — |
| 2007 | 36° | 22° | 29° | — | — |
| 2006 | 42° | 23° | 33° | — | — |
| 2005 | 45° | 32° | 38° | — | — |
| 2004 | 48° | 31° | 39° | 0.64" | — |
| 2003 | 54° | 43° | 48° | 0.79" | — |
| 2002 | 49° | 31° | 40° | — | — |
| 2001 | 46° | 31° | 38° | 3.91" | — |
| 2000 | 44° | 36° | 40° | — | — |
| 1998 | 50° | 32° | 41° | — | — |
| 1997 | 36° | 25° | 30° | 2.06" | — |
| 1996 | 51° | 33° | 42° | — | — |
| 1995 | 58° | 41° | 49° | 0.53" | — |
| 1994 | 45° | 27° | 36° | — | — |
| 1993 | 37° | 30° | 34° | 0.97" | 0.5" |
| 1992 | 38° | 33° | 35° | — | — |
| 1991 | 54° | 35° | 44° | — | — |
| 1990 | 52° | 37° | 44° | — | — |
| 1989 | 46° | 33° | 40° | 1.02" | — |
| 1988 | 46° | 15° | 31° | — | — |
| 1987 | 50° | 38° | 44° | — | — |
| 1986coldest | 39° | 12° | 26° | — | — |
| 1985 | 59° | 29° | 44° | — | — |
| 1984 | 44° | 37° | 41° | 0.51" | — |
| 1983 | 58° | 40° | 49° | — | — |
| 1982 | 50° | 38° | 44° | — | — |
| 1981 | 42° | 25° | 33° | — | — |
| 1980 | 52° | 47° | 49° | 4.7" | — |
| 1979 | 61° | 41° | 51° | — | — |
| 1978 | 55° | 34° | 44° | — | — |
| 1977 | 53° | 31° | 42° | — | — |
| 1976 | 55° | 42° | 49° | — | — |
| 1975 | 46° | 37° | 42° | 0.15" | — |
| 1974 | 47° | 36° | 41° | 8.51" | — |
| 1973 | 44° | 30° | 37° | — | — |
| 1972 | 50° | 33° | 42° | — | — |
| 1971 | 46° | 32° | 39° | — | — |
55 years of data from NEW HAVEN