Weather on May 9
Boston, MA
55 Years of Data
Avg High
62°F
Avg Low
47°F
Warmest
1979
79°F avg
Coldest
2020
40°F avg
About This Date
May 9th in Boston, MA typically brings mild spring weather, with average highs around 62°F and lows near 47°F. Over 55 years of records, the warmest May 9th was in 1979 (79°F average), while the coldest was 2020 (40°F) — a 39°F range across recorded history. Rain or other precipitation has occurred on about 36% of May 9th dates historically, with the wettest May 9th recording 5.82" of rain. The last decade has been 1.8°F cooler on this date compared to 20-30 years ago.
The last decade has been 1.8°F cooler on this date compared to 20-30 years ago.
Planning for May 9th in Boston, MA? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 56° | 48° | 52° | 2.77" | — |
| 2024 | 64° | 49° | 56° | — | — |
| 2023 | 57° | 50° | 54° | — | — |
| 2022 | 56° | 41° | 48° | — | — |
| 2021 | 69° | 49° | 59° | — | — |
| 2020coldest | 44° | 36° | 40° | 0.3" | — |
| 2019 | 55° | 47° | 51° | — | — |
| 2018 | 63° | 46° | 54° | — | — |
| 2017 | 52° | 42° | 47° | — | — |
| 2016 | 66° | 46° | 56° | — | — |
| 2015 | 71° | 46° | 59° | — | — |
| 2014 | 59° | 50° | 55° | — | — |
| 2013 | 63° | 53° | 58° | 1.55" | — |
| 2012 | 63° | 56° | 59° | 0.66" | — |
| 2011 | 68° | 52° | 60° | — | — |
| 2010 | 55° | 42° | 49° | — | — |
| 2009 | 72° | 56° | 64° | 0.48" | — |
| 2008 | 61° | 48° | 54° | 0.53" | — |
| 2007 | 86° | 57° | 72° | — | — |
| 2006 | 54° | 47° | 50° | 2.44" | — |
| 2005 | 53° | 46° | 50° | — | — |
| 2004 | 58° | 48° | 53° | 0.48" | — |
| 2003 | 61° | 46° | 53° | 0.1" | — |
| 2002 | 56° | 49° | 52° | 0.13" | — |
| 2001 | 66° | 47° | 56° | — | — |
| 2000 | 65° | 47° | 56° | — | — |
| 1999 | 74° | 55° | 64° | — | — |
| 1998 | 56° | 50° | 53° | 0.46" | — |
| 1997 | 49° | 44° | 46° | 0.1" | — |
| 1996 | 55° | 49° | 52° | — | — |
| 1995 | 61° | 43° | 52° | — | — |
| 1994 | 75° | 50° | 63° | — | — |
| 1993 | 82° | 54° | 68° | — | — |
| 1992 | 54° | 45° | 49° | 0.43" | — |
| 1991 | 60° | 50° | 55° | — | — |
| 1990 | 81° | 48° | 64° | — | — |
| 1989 | 58° | 44° | 51° | — | — |
| 1988 | 68° | 41° | 55° | — | — |
| 1987 | 71° | 46° | 59° | — | — |
| 1986 | 48° | 42° | 45° | — | — |
| 1985 | 62° | 40° | 51° | — | — |
| 1984 | 63° | 53° | 58° | — | — |
| 1983 | 60° | 45° | 52° | 0.08" | — |
| 1982 | 70° | 54° | 62° | 0.33" | — |
| 1981 | 59° | 42° | 51° | — | — |
| 1980 | 64° | 47° | 55° | — | — |
| 1979warmest | 95° | 63° | 79° | — | — |
| 1978 | 62° | 55° | 59° | 0.64" | — |
| 1977 | 49° | 35° | 42° | 5.82" | — |
| 1976 | 68° | 46° | 57° | — | — |
| 1975 | 58° | 45° | 51° | — | — |
| 1974 | 60° | 44° | 52° | — | — |
| 1973 | 57° | 51° | 54° | 1.73" | — |
| 1972 | 46° | 42° | 44° | 1.7" | — |
| 1971 | 46° | 43° | 44° | 1.22" | — |
55 years of data from BOSTON