Weather on March 18
Boston, MA
55 Years of Data
Avg High
45°F
Avg Low
31°F
Warmest
2011
58°F avg
Coldest
1993
23°F avg
About This Date
March 18th in Boston, MA typically brings chilly spring weather, with average highs around 45°F and lows near 31°F. Over 56 years of records, the warmest March 18th was in 2011 (58°F average), while the coldest was 1993 (23°F) — a 35°F range across recorded history. Precipitation has occurred on 30% of recorded March 18th dates, with snow falling 13% of the time (heaviest snowfall: 9.4"). The last decade has been 2.8°F warmer on this date compared to 20-30 years ago.
The last decade has been 2.8°F warmer on this date compared to 20-30 years ago.
Planning for March 18th in Boston, MA? Bring layers as temperatures can vary throughout the day. Consider bringing rain gear or an umbrella.
Warming Trend
0.8°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026 | 36° | 25° | 30° | — | — |
| 2025 | 49° | 38° | 43° | — | — |
| 2024 | 50° | 37° | 44° | — | — |
| 2023 | 53° | 40° | 46° | — | — |
| 2022 | 68° | 47° | 57° | — | — |
| 2021 | 49° | 38° | 43° | 1.68" | — |
| 2020 | 51° | 37° | 44° | — | — |
| 2019 | 44° | 28° | 36° | — | — |
| 2018 | 33° | 16° | 25° | — | — |
| 2017 | 36° | 24° | 30° | — | — |
| 2016 | 52° | 35° | 43° | 0.08" | — |
| 2015 | 30° | 22° | 26° | — | — |
| 2014 | 33° | 20° | 27° | — | — |
| 2013 | 33° | 21° | 27° | 0.3" | 0.9" |
| 2012 | 74° | 41° | 57° | — | — |
| 2011warmest | 70° | 46° | 58° | — | — |
| 2010 | 66° | 48° | 57° | — | — |
| 2009 | 61° | 34° | 47° | — | — |
| 2008 | 39° | 28° | 34° | — | — |
| 2007 | 34° | 24° | 29° | — | — |
| 2006 | 38° | 22° | 30° | — | — |
| 2005 | 45° | 30° | 37° | — | — |
| 2004 | 29° | 26° | 27° | 0.05" | 0.4" |
| 2003 | 43° | 35° | 39° | — | — |
| 2002 | 37° | 32° | 35° | 0.43" | 0.7" |
| 2001 | 47° | 34° | 40° | 0.18" | — |
| 2000 | 32° | 16° | 24° | — | — |
| 1999 | 70° | 41° | 55° | — | — |
| 1998 | 41° | 32° | 37° | 0.15" | — |
| 1997 | 41° | 28° | 35° | — | — |
| 1996 | 54° | 34° | 44° | — | — |
| 1995 | 52° | 38° | 45° | 0.03" | — |
| 1994 | 40° | 25° | 32° | 0.3" | 1.2" |
| 1993coldest | 30° | 16° | 23° | 0.38" | 1.8" |
| 1992 | 42° | 25° | 33° | — | — |
| 1991 | 51° | 36° | 43° | 0.2" | — |
| 1990 | 59° | 41° | 50° | 0.86" | — |
| 1989 | 42° | 31° | 36° | 1.22" | — |
| 1988 | 47° | 34° | 40° | — | — |
| 1987 | 45° | 31° | 38° | — | — |
| 1986 | 54° | 38° | 46° | — | — |
| 1985 | 38° | 26° | 32° | 0.51" | 1.9" |
| 1984 | 32° | 29° | 30° | 0.23" | — |
| 1983 | 45° | 38° | 41° | — | — |
| 1982 | 50° | 33° | 42° | — | — |
| 1981 | 37° | 20° | 28° | — | — |
| 1980 | 55° | 34° | 44° | 1.47" | — |
| 1979 | 42° | 27° | 34° | — | — |
| 1978 | 39° | 24° | 32° | — | — |
| 1977 | 37° | 29° | 33° | 2.29" | 9.4" |
| 1976 | 32° | 18° | 25° | — | — |
| 1975 | 47° | 33° | 40° | — | — |
| 1974 | 42° | 28° | 35° | — | — |
| 1973 | 47° | 33° | 40° | — | — |
| 1972 | 50° | 38° | 44° | — | — |
| 1971 | 43° | 28° | 35° | — | — |
56 years of data from BOSTON