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Best time to visit Boston: month by month
Short answer
Late May to June and September to October are the best months, with highs of about 18–25°C and pleasant walking weather; October adds New England autumn colours. July and August are warm (about 28°C) and busy, and winters are cold and snowy, with average highs of 3–7°C. Autumn is popular, so book early for October.
Month by month
| Month | High | Low | Rainy days | Crowds |
|---|---|---|---|---|
| Jan | 3°C | -4°C | 11 | low |
| Feb | 5°C | -6°C | 11 | low |
| Mar | 9°C | -1°C | 11 | low |
| Apr | 14°C | 5°C | 10 | medium |
| May | 21°C | 10°C | 9 | high |
| Jun | 25°C | 15°C | 11 | high |
| Jul | 28°C | 19°C | 13 | high |
| Aug | 28°C | 19°C | 13 | high |
| Sep | 23°C | 15°C | 12 | high |
| Oct | 18°C | 10°C | 9 | very high |
| Nov | 11°C | 2°C | 7 | medium |
| Dec | 7°C | -1°C | 11 | medium |
Temperatures and rainy days: Copernicus ERA5 averages, 2021–2023. Crowd levels are our estimate.
Season by season
Spring (Mar–May)
Highs rise from about 9°C in March to 21°C in May, with about 9–11 rainy days a month; the Boston Marathon in April and blossoms in the Public Garden.
Summer (Jun–Aug)
Highs of 25–28°C and lows of 15–19°C, sometimes humid, with 11–13 rainy days; peak for whale watching, baseball and waterfront events.
Autumn (Sep–Nov)
Highs of about 23°C in September falling to 11°C in November; October brings autumn colour and the Head of the Charles Regatta.
Winter (Dec–Feb)
Cold, with highs of 3–7°C, lows below freezing and snow; quiet and cheaper, but storms can disrupt travel.
Events worth planning around
- St Patrick's Day parade in South Boston — March
- Boston Marathon — Patriots' Day, the third Monday of April
- Boston Pops Fourth of July concert and fireworks on the Esplanade — 4 July
- Head of the Charles Regatta — October
When to avoid
January and February are the coldest months, with snowstorms that can disrupt plans. If you want lower prices, avoid October and college graduation weekends in May, when hotels are at their most expensive.
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Common questions
When is the best time to visit Boston?
Late May to June and September to October, with highs of about 18–25°C.
When are the autumn colours in Boston?
Usually from early to late October, earlier further north in New England.
How cold is Boston in winter?
Average highs are 3–7°C and lows below freezing, with regular snow from December to March.