Weather on May 21
Hartford, CT
55 Years of Data
Avg High
74°F
Avg Low
51°F
Warmest
1996
81°F avg
Coldest
1997
43°F avg
About This Date
May 21st in Hartford, CT typically brings pleasant spring weather, with average highs around 74°F and lows near 51°F. Over 55 years of records, the warmest May 21st was in 1996 (81°F average), while the coldest was 1997 (43°F) — a 38°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 3.2" of rain. 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 May 21st in Hartford, CT? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 53° | 47° | 50° | 0.25" | — |
| 2024 | 84° | 56° | 70° | — | — |
| 2023 | 72° | 55° | 63° | — | — |
| 2022 | 92° | 64° | 78° | — | — |
| 2021 | 81° | 53° | 67° | — | — |
| 2020 | 74° | 40° | 57° | — | — |
| 2019 | 68° | 55° | 62° | — | — |
| 2018 | 79° | 52° | 65° | — | — |
| 2017 | 70° | 45° | 57° | — | — |
| 2016 | 72° | 51° | 61° | — | — |
| 2015 | 68° | 45° | 56° | — | — |
| 2014 | 77° | 47° | 62° | — | — |
| 2013 | 88° | 59° | 73° | — | — |
| 2012 | 72° | 56° | 64° | 0.3" | — |
| 2011 | 75° | 54° | 64° | 0.2" | — |
| 2010 | 86° | 55° | 71° | — | — |
| 2009 | 87° | 57° | 72° | — | — |
| 2008 | 69° | 46° | 58° | 0.23" | — |
| 2007 | 67° | 47° | 57° | — | — |
| 2006 | 66° | 44° | 55° | 0.46" | — |
| 2005 | 69° | 43° | 56° | 0.1" | — |
| 2004 | 78° | 55° | 67° | 0.41" | — |
| 2003 | 61° | 51° | 56° | 0.36" | — |
| 2002 | 61° | 37° | 49° | — | — |
| 2001 | 70° | 51° | 60° | 0.1" | — |
| 2000 | 54° | 50° | 52° | 0.05" | — |
| 1999 | 79° | 45° | 62° | — | — |
| 1998 | 79° | 57° | 68° | — | — |
| 1997coldest | 62° | 24° | 43° | — | — |
| 1996warmest | 99° | 64° | 81° | — | — |
| 1995 | 82° | 44° | 63° | — | — |
| 1994 | 77° | 40° | 58° | — | — |
| 1993 | 68° | 45° | 56° | — | — |
| 1992 | 89° | 53° | 71° | — | — |
| 1991 | 75° | 45° | 60° | — | — |
| 1990 | 59° | 44° | 52° | 0.76" | — |
| 1989 | 84° | 57° | 71° | — | — |
| 1988 | 80° | 55° | 68° | 0.23" | — |
| 1987 | 60° | 50° | 55° | — | — |
| 1986 | 74° | 63° | 68° | 0.08" | — |
| 1985 | 81° | 58° | 69° | — | — |
| 1984 | 74° | 50° | 62° | 0.38" | — |
| 1983 | 60° | 44° | 52° | — | — |
| 1982 | 84° | 56° | 70° | 0.79" | — |
| 1981 | 74° | 46° | 60° | — | — |
| 1980 | 77° | 50° | 64° | 0.25" | — |
| 1979 | 67° | 53° | 60° | — | — |
| 1978 | 89° | 64° | 77° | — | — |
| 1977 | 82° | 54° | 68° | — | — |
| 1976 | 63° | 41° | 52° | — | — |
| 1975 | 91° | 63° | 77° | — | — |
| 1974 | 68° | 43° | 55° | — | — |
| 1973 | 65° | 52° | 58° | 3.2" | — |
| 1972 | 80° | 53° | 67° | — | — |
| 1971 | 66° | 51° | 59° | 0.38" | — |
55 years of data from HARTFORD BRAINARD FLD