Weather on May 18
New Haven, CT
55 Years of Data
Avg High
69°F
Avg Low
50°F
Warmest
1977
78°F avg
Coldest
2002
47°F avg
About This Date
May 18th in New Haven, CT typically brings mild spring weather, with average highs around 69°F and lows near 50°F. Over 52 years of records, the warmest May 18th was in 1977 (78°F average), while the coldest was 2002 (47°F) — a 31°F range across recorded history. Rain or other precipitation has occurred on about 38% of May 18th dates historically, with the wettest May 18th recording 5.89" of rain. The last decade has been 4.9°F warmer on this date compared to 20-30 years ago.
The last decade has been 4.9°F warmer on this date compared to 20-30 years ago.
Planning for May 18th in New Haven, CT? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
Cooling Trend
0.7°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 73° | 62° | 68° | — | — |
| 2024 | 68° | 58° | 63° | 0.1" | — |
| 2023 | 60° | 34° | 47° | — | — |
| 2022 | 71° | 52° | 61° | — | — |
| 2021 | 77° | 49° | 63° | — | — |
| 2020 | 67° | 53° | 60° | — | — |
| 2019 | 73° | 48° | 61° | — | — |
| 2018 | 65° | 51° | 58° | — | — |
| 2017 | 85° | 62° | 73° | — | — |
| 2016 | 65° | 45° | 55° | — | — |
| 2015 | 62° | 53° | 58° | — | — |
| 2014 | 70° | 49° | 59° | — | — |
| 2013 | 70° | 47° | 58° | — | — |
| 2012 | 68° | 46° | 57° | — | — |
| 2011 | 67° | 56° | 61° | 5.89" | — |
| 2010 | 57° | 50° | 54° | 2.59" | — |
| 2009 | 58° | 47° | 52° | — | — |
| 2008 | 63° | 53° | 58° | 0.03" | — |
| 2007 | 50° | 45° | 47° | 0.69" | — |
| 2006 | 69° | 50° | 60° | — | — |
| 2005 | 67° | 46° | 56° | — | — |
| 2004 | 71° | 55° | 63° | 0.08" | — |
| 2003 | 62° | 36° | 49° | — | — |
| 2002coldest | 53° | 41° | 47° | 3.23" | — |
| 2001 | 60° | 52° | 56° | — | — |
| 2000 | 72° | 53° | 62° | 1.04" | — |
| 1996 | 69° | 48° | 59° | 1.68" | — |
| 1995 | 68° | 56° | 62° | 0.56" | — |
| 1994 | 60° | 41° | 51° | 0.1" | — |
| 1993 | 69° | 45° | 57° | — | — |
| 1992 | 70° | 46° | 58° | — | — |
| 1991 | 79° | 47° | 63° | 1.04" | — |
| 1990 | 68° | 49° | 58° | — | — |
| 1989 | 79° | 56° | 67° | — | — |
| 1988 | 67° | 58° | 62° | 0.51" | — |
| 1987 | 85° | 44° | 64° | — | — |
| 1986 | 83° | 57° | 70° | — | — |
| 1985 | 63° | 51° | 57° | 0.76" | — |
| 1984 | 67° | 40° | 53° | — | — |
| 1983 | 61° | 41° | 51° | — | — |
| 1982 | 81° | 50° | 65° | 0.38" | — |
| 1981 | 68° | 43° | 55° | — | — |
| 1980 | 70° | 52° | 61° | 0.38" | — |
| 1979 | 73° | 55° | 64° | 0.25" | — |
| 1978 | 58° | 47° | 52° | — | — |
| 1977warmest | 91° | 65° | 78° | 0.76" | — |
| 1976 | 68° | 59° | 64° | 1.52" | — |
| 1975 | 64° | 51° | 58° | — | — |
| 1974 | 85° | 60° | 72° | — | — |
| 1973 | 65° | 47° | 56° | 0.51" | — |
| 1972 | 72° | 50° | 61° | — | — |
| 1971 | 81° | 55° | 68° | — | — |
52 years of data from NEW HAVEN