Best time to visit Boston
The best months to visit Boston are September, June and August, based on month-by-month temperature and rainfall data. The full year of weather, daylight, holidays, and festival timing is below.
September, June and August score best for Boston weather:
- June25° / 15°CJune starts warm harbor weather, with ferry trips, Esplanade walks, and North End dinners comfortable after sunset.
- August27° / 18°CAugust stays warm, making harbor ferries and Cape Cod day trips attractive while museums handle thunderstorm afternoons.
- September23° / 15°CSeptember is a prime shoulder month for Fenway, Harvard Square, and seafood patios after student move-in settles.
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By TripSapien Research · Updated May 20, 2026
Boston weather by month
| Month | High | Low | Rain (mm) | Rainy days | Daylight | Sea |
|---|---|---|---|---|---|---|
| January | 3° | -5° | 85 | 12 | 9h | 3° |
| February | 4° | -4° | 80 | 11 | 10h | 1° |
| March | 8° | 0° | 105 | 12 | 12h | 5° |
| April | 14° | 5° | 90 | 12 | 13h | 7° |
| May | 19° | 10° | 85 | 12 | 14h | 13° |
| JuneBest weather | 25° | 15° | 100 | 11 | 15h | 17° |
| July | 28° | 19° | 85 | 9 | 15h | 19° |
| AugustBest weather | 27° | 18° | 80 | 9 | 14h | 19° |
| SeptemberBest weather | 23° | 15° | 90 | 9 | 12h | 19° |
| October | 17° | 9° | 100 | 10 | 11h | 14° |
| November | 11° | 3° | 95 | 10 | 10h | 9° |
| December | 6° | -2° | 110 | 12 | 9h | 4° |
Temperatures in °C. Long-term monthly averages.
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Boston month by month
January
Boston in January: 2.7°C high, -4.9°C low, 85mm rain over 12 days, 9.2h daylight. Cold and clearer — short daylight but skies open.
First Night (December 31 January 1)
February
Boston in February: 3.9°C high, -4.1°C low, 80mm rain over 11 days, 10.3h daylight. Cold and clearer — short daylight but skies open.
March
Boston in March: 7.5°C high, -0.5°C low, 105mm rain over 12 days, 11.7h daylight. Mild but rainy — flexible plans pay off.
Evacuation Day (March 17)
April
Boston in April: 13.6°C high, 4.9°C low, 90mm rain over 12 days, 13.2h daylight. Mild and dry — shoulder-season sweet spot.
Patriot's Day
May
Boston in May: 19.2°C high, 10.2°C low, 85mm rain over 12 days, 14.4h daylight. Mild and dry — shoulder-season sweet spot.
JuneBest weather
Boston in June: 24.6°C high, 15.4°C low, 100mm rain over 11 days, 15.1h daylight. Mild but rainy — flexible plans pay off.
July
Boston in July: 27.8°C high, 18.9°C low, 85mm rain over 9 days, 14.8h daylight. Mild and dry — shoulder-season sweet spot.
Harborfest · Independence Day (July 4)
AugustBest weather
Boston in August: 26.9°C high, 18.4°C low, 80mm rain over 9 days, 13.7h daylight. Mild and dry — shoulder-season sweet spot.
St. Anthony's Feast · Allston Christmas (August 31 September 1)
SeptemberBest weather
Boston in September: 22.8°C high, 14.6°C low, 90mm rain over 9 days, 12.3h daylight. Mild and dry — shoulder-season sweet spot.
Allston Christmas (August 31 September 1)
October
Boston in October: 16.7°C high, 8.6°C low, 100mm rain over 10 days, 10.8h daylight. Mild but rainy — flexible plans pay off.
Head of the Charles Regatta
November
Boston in November: 10.9°C high, 3.3°C low, 95mm rain over 10 days, 9.5h daylight. Mild and dry — shoulder-season sweet spot.
December
Boston in December: 5.7°C high, -1.6°C low, 110mm rain over 12 days, 8.9h daylight. Cold and wet — bundle up, museum and pool weather.
First Night (December 31 January 1)
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