Weather in Boston
What's the weather like in Boston?
Boston has a wide swing between hot summers and cold winters and moderate rainfall spread across the year. Average daytime highs range from 2°C (36°F) in January to 28°C (82°F) in July, with overnight lows around -6°C (21°F) and 18°C (64°F) respectively.
For comfortable sightseeing temperatures (18–26°C daytime highs), the best months to visit Boston are May through September.
Quick facts
- Country
- 🇺🇸 United States
- Region
- North America
- Time zone
- America/New_York
- Coordinates
- 42.360, -71.059
Monthly climate
Long-run averages for each month of the year.
| Month | Avg high | Avg low | Rainfall | Rain days | Snow days |
|---|---|---|---|---|---|
| January | 2°C / 36°F | -6°C / 21°F | 88 mm | 10 | 10 |
| February | 3°C / 37°F | -5°C / 23°F | 88 mm | 10 | 9 |
| March | 7°C / 45°F | -1°C / 30°F | 104 mm | 11 | 5 |
| April | 14°C / 57°F | 4°C / 39°F | 92 mm | 11 | 1 |
| May | 19°C / 66°F | 9°C / 48°F | 88 mm | 11 | 0 |
| June | 25°C / 77°F | 15°C / 59°F | 95 mm | 11 | 0 |
| July | 28°C / 82°F | 18°C / 64°F | 84 mm | 9 | 0 |
| August | 27°C / 81°F | 17°C / 63°F | 94 mm | 9 | 0 |
| September | 23°C / 73°F | 13°C / 55°F | 85 mm | 9 | 0 |
| October | 17°C / 63°F | 7°C / 45°F | 96 mm | 10 | 0 |
| November | 11°C / 52°F | 2°C / 36°F | 108 mm | 11 | 1 |
| December | 5°C / 41°F | -3°C / 27°F | 106 mm | 12 | 7 |
Boston by month
Detailed weather for any specific month:
Seasonal patterns to know
Atlantic hurricane season runs June–November (peak August–October). Tropical storms and hurricanes are possible — peak risk is August–October.
Cities with a similar climate to Boston
Frequently asked questions
When is the best time to visit Boston?
The most comfortable months in Boston are usually May, June, September, when average highs sit near 18–26°C (64–79°F) with relatively little rain. See the full month-by-month breakdown for the exact figures.
What is the hottest month in Boston?
July is typically the hottest month in Boston, averaging a high of 28°C (82°F).
What is the coldest month in Boston?
January is usually the coldest, with average lows around -6°C (21°F).
Does it snow in Boston?
Yes — Boston sees some snow, mainly around January (about 10 snow days). Most other months stay snow-free.
Live forecast, sunrise/sunset, and more.