Weather on May 18
New Haven, CT
55 Years of Data
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 53 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 5.5°F warmer on this date compared to 20-30 years ago.
The last decade has been 5.5°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.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026 | 78° | 56° | 67° | — | — |
| 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° | — | — |
New Haven, CT Temperature Range by Month
Average monthly highs and lows. The shaded band shows the typical daily temperature range.
New Haven, CT Monthly Precipitation
Average rainfall and snowfall per month, in inches.
New Haven, CT Daily Temperature Calendar
Average daily high temperature for every day of the year. Each cell is the climatological mean for that calendar day across 55 years of NOAA data.
Best Time to Visit New Haven, CT
New Haven, CT has no months that meet our "pleasant" threshold — every season has tradeoffs.