Weather on May 18
Hartford, CT
55 Years of Data
Avg High
71°F
Avg Low
49°F
Warmest
2017
81°F avg
Coldest
1994
43°F avg
About This Date
May 18th in Hartford, CT typically brings pleasant spring weather, with average highs around 71°F and lows near 49°F. Over 55 years of records, the warmest May 18th was in 2017 (81°F average), while the coldest was 1994 (43°F) — a 38°F range across recorded history. Rain or other precipitation has occurred on about 40% of May 18th dates historically, with the wettest May 18th recording 3.94" of rain. The last decade has been 6.0°F warmer on this date compared to 20-30 years ago.
The last decade has been 6.0°F warmer on this date compared to 20-30 years ago.
Planning for May 18th in Hartford, CT? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
Cooling Trend
0.5°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 69° | 56° | 62° | — | — |
| 2024 | 64° | 56° | 60° | 0.1" | — |
| 2023 | 63° | 34° | 48° | — | — |
| 2022 | 74° | 55° | 64° | — | — |
| 2021 | 83° | 50° | 66° | — | — |
| 2020 | 68° | 53° | 61° | 0.03" | — |
| 2019 | 75° | 53° | 64° | — | — |
| 2018 | 67° | 49° | 58° | — | — |
| 2017warmest | 95° | 66° | 81° | 0.28" | — |
| 2016 | 72° | 47° | 59° | — | — |
| 2015 | 79° | 58° | 68° | — | — |
| 2014 | 69° | 50° | 60° | — | — |
| 2013 | 71° | 45° | 58° | — | — |
| 2012 | 73° | 44° | 59° | — | — |
| 2011 | 64° | 53° | 59° | 1.09" | — |
| 2010 | 60° | 50° | 55° | 2.24" | — |
| 2009 | 57° | 45° | 51° | — | — |
| 2008 | 68° | 50° | 59° | 0.05" | — |
| 2007 | 48° | 45° | 46° | 0.56" | — |
| 2006 | 74° | 52° | 63° | — | — |
| 2005 | 67° | 46° | 56° | — | — |
| 2004 | 76° | 56° | 66° | 0.81" | — |
| 2003 | 73° | 36° | 54° | — | — |
| 2002 | 53° | 38° | 45° | 3.12" | — |
| 2001 | 61° | 53° | 57° | — | — |
| 2000 | 72° | 56° | 64° | 1.4" | — |
| 1999 | 73° | 45° | 59° | — | — |
| 1998 | 65° | 50° | 57° | 0.1" | — |
| 1997 | 67° | 26° | 46° | 0.51" | — |
| 1996 | 69° | 48° | 59° | — | — |
| 1995 | 68° | 56° | 62° | 0.03" | — |
| 1994coldest | 62° | 25° | 43° | 1.27" | — |
| 1993 | 65° | 50° | 57° | 0.58" | — |
| 1992 | 69° | 48° | 59° | — | — |
| 1991 | 87° | 50° | 69° | 3.94" | — |
| 1990 | 58° | 48° | 53° | 0.81" | — |
| 1989 | 79° | 53° | 66° | — | — |
| 1988 | 75° | 56° | 65° | 0.89" | — |
| 1987 | 87° | 51° | 69° | — | — |
| 1986 | 80° | 56° | 68° | — | — |
| 1985 | 70° | 60° | 65° | 1.09" | — |
| 1984 | 61° | 31° | 46° | — | — |
| 1983 | 57° | 33° | 45° | — | — |
| 1982 | 83° | 48° | 65° | — | — |
| 1981 | 66° | 41° | 54° | — | — |
| 1980 | 77° | 52° | 64° | — | — |
| 1979 | 72° | 51° | 61° | — | — |
| 1978 | 61° | 47° | 54° | 0.08" | — |
| 1977 | 90° | 60° | 75° | — | — |
| 1976 | 75° | 60° | 68° | — | — |
| 1975 | 77° | 49° | 63° | — | — |
| 1974 | 90° | 58° | 74° | 0.03" | — |
| 1973 | 62° | 50° | 56° | 1.68" | — |
| 1972 | 80° | 49° | 64° | — | — |
| 1971 | 83° | 46° | 64° | — | — |
55 years of data from HARTFORD BRAINARD FLD