Weather on May 21
New Haven, CT
55 Years of Data
Avg High
72°F
Avg Low
52°F
Warmest
1996
82°F avg
Coldest
2002
49°F avg
About This Date
May 21st in New Haven, CT typically brings pleasant spring weather, with average highs around 72°F and lows near 52°F. Over 52 years of records, the warmest May 21st was in 1996 (82°F average), while the coldest was 2002 (49°F) — a 33°F range across recorded history. Rain or other precipitation has occurred on about 33% of May 21st dates historically, with the wettest May 21st recording 3.84" of rain. The last decade has been 1.2°F warmer on this date compared to 20-30 years ago.
The last decade has been 1.2°F warmer on this date compared to 20-30 years ago.
Planning for May 21st in New Haven, CT? 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 | 58° | 50° | 54° | 0.03" | — |
| 2024 | 76° | 57° | 66° | — | — |
| 2023 | 72° | 58° | 65° | — | — |
| 2022 | 79° | 61° | 70° | — | — |
| 2021 | 75° | 50° | 63° | — | — |
| 2020 | 66° | 38° | 52° | — | — |
| 2019 | 73° | 58° | 65° | — | — |
| 2018 | 72° | 51° | 61° | — | — |
| 2017 | 66° | 44° | 55° | — | — |
| 2016 | 63° | 46° | 54° | — | — |
| 2015 | 63° | 47° | 55° | — | — |
| 2014 | 73° | 54° | 63° | — | — |
| 2013 | 80° | 60° | 70° | — | — |
| 2012 | 67° | 58° | 62° | 0.33" | — |
| 2011 | 67° | 54° | 60° | 0.05" | — |
| 2010 | 81° | 53° | 67° | — | — |
| 2009 | 80° | 51° | 66° | — | — |
| 2008 | 65° | 47° | 56° | 0.05" | — |
| 2007 | 69° | 49° | 59° | — | — |
| 2006 | 64° | 47° | 55° | 0.36" | — |
| 2005 | 71° | 42° | 57° | — | — |
| 2004 | 76° | 57° | 66° | 0.1" | — |
| 2003 | 59° | 45° | 52° | 0.36" | — |
| 2002coldest | 59° | 40° | 49° | — | — |
| 2001 | 66° | 49° | 57° | 0.2" | — |
| 2000 | 54° | 50° | 52° | — | — |
| 1996warmest | 95° | 68° | 82° | — | — |
| 1995 | 78° | 45° | 61° | — | — |
| 1994 | 69° | 38° | 53° | — | — |
| 1993 | 67° | 41° | 54° | — | — |
| 1992 | 86° | 48° | 67° | — | — |
| 1991 | 80° | 40° | 60° | — | — |
| 1990 | 67° | 44° | 55° | 1.73" | — |
| 1989 | 83° | 62° | 72° | 0.38" | — |
| 1988 | 70° | 58° | 64° | — | — |
| 1987 | 72° | 52° | 62° | — | — |
| 1986 | 69° | 62° | 66° | 0.56" | — |
| 1985 | 76° | 59° | 67° | 1.27" | — |
| 1984 | 75° | 53° | 64° | 0.51" | — |
| 1983 | 73° | 59° | 66° | — | — |
| 1982 | 78° | 58° | 68° | 0.3" | — |
| 1981 | 73° | 38° | 55° | — | — |
| 1980 | 78° | 49° | 63° | — | — |
| 1979 | 73° | 61° | 67° | — | — |
| 1978 | 83° | 60° | 71° | — | — |
| 1977 | 75° | 57° | 66° | — | — |
| 1976 | 70° | 48° | 59° | 0.51" | — |
| 1975 | 87° | 62° | 75° | — | — |
| 1974 | 69° | 48° | 59° | — | — |
| 1973 | 63° | 54° | 58° | 3.84" | — |
| 1972 | 75° | 56° | 65° | 3.05" | — |
| 1971 | 66° | 52° | 59° | — | — |
52 years of data from NEW HAVEN