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Get the Boston MA weather forecast without ads, cookies, or tracking. Open-Meteo data, 10-day forecast, hourly conditions, and radar — all free. click here to hide this
July is the hottest month in Boston MA, with an average high of 82°F / 28°C; January is the coldest (37°F / 3°C). December is the wettest month, averaging 4.3 in / 109 mm of precipitation.
| Month | High °F / °C | Low °F / °C | Precip in / mm | Wet days |
|---|---|---|---|---|
| Jan | 37 / 3 | 23 / -5 | 3.4 / 86 | 9 |
| Feb | 39 / 4 | 25 / -4 | 3.2 / 82 | 8 |
| Mar | 46 / 8 | 31 / 0 | 4.2 / 106 | 9 |
| Apr | 57 / 14 | 41 / 5 | 3.6 / 92 | 9 |
| May | 67 / 19 | 50 / 10 | 3.3 / 83 | 9 |
| Jun | 76 / 25 | 60 / 16 | 3.9 / 99 | 9 |
| Jul | 82 / 28 | 66 / 19 | 3.3 / 83 | 8 |
| Aug | 81 / 27 | 65 / 19 | 3.1 / 80 | 7 |
| Sep | 73 / 23 | 58 / 15 | 3.5 / 90 | 7 |
| Oct | 62 / 17 | 48 / 9 | 4.0 / 102 | 8 |
| Nov | 52 / 11 | 38 / 3 | 3.7 / 93 | 8 |
| Dec | 42 / 6 | 29 / -1 | 4.3 / 109 | 9 |
Extremes since 1936: highest 103°F / 39°C (July 22, 2011), lowest -14°F / -26°C (February 15, 1943).
Daylight lasts about 15.1 hours in June and 8.9 hours in December.
Data: Meteostat — Boston Logan International, 1991–2020 averages.
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