Weather on May 18
Boston, MA
55 Years of Data
Avg High
66°F
Avg Low
50°F
Warmest
2017
83°F avg
Coldest
2002
44°F avg
About This Date
May 18th in Boston, MA typically brings mild spring weather, with average highs around 66°F and lows near 50°F. Over 55 years of records, the warmest May 18th was in 2017 (83°F average), while the coldest was 2002 (44°F) — a 39°F range across recorded history. Rain or other precipitation has occurred on about 42% of May 18th dates historically, with the wettest May 18th recording 4.37" of rain. The last decade has been 5.2°F warmer on this date compared to 20-30 years ago.
The last decade has been 5.2°F warmer on this date compared to 20-30 years ago.
Planning for May 18th in Boston, MA? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 70° | 59° | 64° | — | — |
| 2024 | 60° | 53° | 57° | 1.55" | — |
| 2023 | 64° | 42° | 53° | — | — |
| 2022 | 73° | 54° | 63° | — | — |
| 2021 | 84° | 59° | 72° | — | — |
| 2020 | 58° | 47° | 52° | — | — |
| 2019 | 70° | 53° | 61° | — | — |
| 2018 | 65° | 47° | 56° | — | — |
| 2017warmest | 95° | 71° | 83° | 0.13" | — |
| 2016 | 59° | 49° | 54° | — | — |
| 2015 | 58° | 49° | 53° | — | — |
| 2014 | 63° | 52° | 57° | — | — |
| 2013 | 67° | 51° | 59° | — | — |
| 2012 | 65° | 49° | 57° | — | — |
| 2011 | 53° | 50° | 52° | 0.13" | — |
| 2010 | 62° | 48° | 55° | 2.24" | — |
| 2009 | 53° | 46° | 50° | — | — |
| 2008 | 71° | 55° | 63° | — | — |
| 2007 | 46° | 42° | 44° | 4.37" | — |
| 2006 | 76° | 52° | 64° | — | — |
| 2005 | 53° | 46° | 50° | 0.1" | — |
| 2004 | 75° | 53° | 64° | 0.56" | — |
| 2003 | 64° | 39° | 52° | — | — |
| 2002coldest | 52° | 37° | 44° | 2.77" | — |
| 2001 | 62° | 49° | 55° | — | — |
| 2000 | 71° | 54° | 62° | 0.36" | — |
| 1999 | 65° | 53° | 59° | — | — |
| 1998 | 83° | 54° | 68° | — | — |
| 1997 | 68° | 46° | 57° | — | — |
| 1996 | 56° | 49° | 52° | 0.05" | — |
| 1995 | 75° | 51° | 63° | — | — |
| 1994 | 53° | 46° | 50° | 0.05" | — |
| 1993 | 60° | 50° | 55° | 0.69" | — |
| 1992 | 79° | 55° | 67° | 0.03" | — |
| 1991 | 56° | 44° | 50° | 0.05" | — |
| 1990 | 57° | 45° | 51° | 0.3" | — |
| 1989 | 72° | 53° | 62° | — | — |
| 1988 | 55° | 49° | 52° | 0.15" | — |
| 1987 | 64° | 48° | 56° | — | — |
| 1986 | 78° | 61° | 69° | — | — |
| 1985 | 63° | 51° | 57° | 0.64" | — |
| 1984 | 57° | 44° | 51° | — | — |
| 1983 | 59° | 42° | 51° | — | — |
| 1982 | 69° | 52° | 60° | — | — |
| 1981 | 66° | 44° | 55° | — | — |
| 1980 | 65° | 53° | 59° | 0.25" | — |
| 1979 | 57° | 51° | 54° | 0.18" | — |
| 1978 | 58° | 49° | 53° | 0.03" | — |
| 1977 | 85° | 51° | 68° | 0.2" | — |
| 1976 | 80° | 58° | 69° | 0.03" | — |
| 1975 | 74° | 54° | 64° | — | — |
| 1974 | 76° | 58° | 67° | — | — |
| 1973 | 60° | 47° | 53° | 1.17" | — |
| 1972 | 65° | 50° | 57° | — | — |
| 1971 | 64° | 48° | 56° | — | — |
55 years of data from BOSTON