Weather on May 15
Boston, MA
55 Years of Data
Avg High
67°F
Avg Low
51°F
Warmest
2004
75°F avg
Coldest
2006
48°F avg
About This Date
May 15th in Boston, MA typically brings mild spring weather, with average highs around 67°F and lows near 51°F. Over 55 years of records, the warmest May 15th was in 2004 (75°F average), while the coldest was 2006 (48°F) — a 27°F range across recorded history. Rain or other precipitation has occurred on about 45% of May 15th dates historically, with the wettest May 15th recording 4.39" of rain. The last decade has been 5.3°F warmer on this date compared to 20-30 years ago.
The last decade has been 5.3°F warmer on this date compared to 20-30 years ago.
Planning for May 15th in Boston, MA? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
Warming Trend
0.7°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 68° | 55° | 62° | 0.89" | — |
| 2024 | 70° | 55° | 62° | 0.76" | — |
| 2023 | 74° | 52° | 63° | — | — |
| 2022 | 78° | 63° | 70° | 0.03" | — |
| 2021 | 74° | 61° | 67° | — | — |
| 2020 | 74° | 51° | 62° | 1.7" | — |
| 2019 | 62° | 45° | 53° | 0.03" | — |
| 2018 | 85° | 58° | 71° | 2.54" | — |
| 2017 | 61° | 47° | 54° | 0.18" | — |
| 2016 | 61° | 45° | 53° | — | — |
| 2015 | 67° | 48° | 57° | — | — |
| 2014 | 77° | 57° | 67° | — | — |
| 2013 | 67° | 44° | 55° | — | — |
| 2012 | 73° | 56° | 64° | 1.27" | — |
| 2011 | 57° | 50° | 54° | 2.72" | — |
| 2010 | 71° | 56° | 63° | — | — |
| 2009 | 70° | 57° | 63° | — | — |
| 2008 | 69° | 52° | 60° | — | — |
| 2007 | 82° | 54° | 68° | 0.23" | — |
| 2006coldest | 50° | 47° | 48° | 0.91" | — |
| 2005 | 55° | 45° | 50° | 0.03" | — |
| 2004warmest | 89° | 61° | 75° | — | — |
| 2003 | 60° | 45° | 52° | — | — |
| 2002 | 60° | 43° | 51° | — | — |
| 2001 | 57° | 47° | 52° | 0.03" | — |
| 2000 | 63° | 49° | 56° | — | — |
| 1999 | 63° | 47° | 55° | — | — |
| 1998 | 68° | 46° | 57° | — | — |
| 1997 | 72° | 50° | 61° | 0.23" | — |
| 1996 | 68° | 43° | 55° | — | — |
| 1995 | 51° | 48° | 50° | 0.81" | — |
| 1994 | 74° | 51° | 62° | 1.02" | — |
| 1993 | 73° | 50° | 62° | — | — |
| 1992 | 56° | 48° | 52° | — | — |
| 1991 | 64° | 51° | 58° | — | — |
| 1990 | 78° | 54° | 66° | — | — |
| 1989 | 68° | 51° | 60° | — | — |
| 1988 | 70° | 47° | 58° | — | — |
| 1987 | 67° | 47° | 57° | 0.2" | — |
| 1986 | 65° | 46° | 55° | — | — |
| 1985 | 64° | 42° | 53° | — | — |
| 1984 | 59° | 43° | 51° | 0.18" | — |
| 1983 | 60° | 53° | 57° | 0.33" | — |
| 1982 | 58° | 54° | 56° | — | — |
| 1981 | 76° | 54° | 65° | 0.03" | — |
| 1980 | 67° | 52° | 59° | — | — |
| 1979 | 61° | 55° | 58° | 0.28" | — |
| 1978 | 51° | 49° | 50° | 4.39" | — |
| 1977 | 64° | 45° | 54° | — | — |
| 1976 | 83° | 55° | 69° | 0.03" | — |
| 1975 | 76° | 48° | 62° | — | — |
| 1974 | 80° | 59° | 70° | — | — |
| 1973 | 56° | 51° | 53° | 0.66" | — |
| 1972 | 64° | 53° | 59° | 2.9" | — |
| 1971 | 70° | 44° | 57° | — | — |
55 years of data from BOSTON