Boston: Weather Guide & Climate
Complete month-by-month weather guide: Boston. Best time to visit: May, June, September, October. Plan your trip with detailed climate data.
Climate Overview
Boston has a cool climate with average yearly highs of 16°C, lows of 7°C, and approximately 9 rainy days per month.
The best time to visit Boston is during May, June, September, October, when weather is pleasant and ideal for outdoor activities
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Air Quality
Best Time
May, Jun, Sep, Oct
Hottest
Coldest
Driest Month
Forecast for your trip dates
Up to 16 days ahead| Month | High | Low | Rainy days | Condition |
|---|---|---|---|---|
| January | 5°C | -3°C | 7 | Good |
| February | 5°C | -3°C | 10 | Good |
| March | 10°C | 0°C | 12 | Good |
| April | 10°C | 2°C | 12 | Good |
| May | 19°C | 8°C | 8 | Excellent (best) |
| June | 26°C | 16°C | 9 | Excellent (best) |
| July | 29°C | 20°C | 11 | Good |
| August | 29°C | 19°C | 10 | Good |
| September | 24°C | 14°C | 6 | Excellent (best) |
| October | 17°C | 8°C | 9 | Excellent (best) |
| November | 13°C | 4°C | 9 | Good |
| December | 5°C | -3°C | 9 | Good |
Weather data: Open-Meteo Archive (2020-2025) • Open-Meteo.com (CC BY 4.0) • Historical avg. 2020–2025
Weather by Season
Winter
Dec–Feb
High: 5°C
Low: -3°C
Rainy days: 9 days/month
Spring
Mar–May
High: 13°C
Low: 3°C
Rainy days: 11 days/month
Summer
Jun–Aug
High: 28°C
Low: 18°C
Rainy days: 10 days/month
Autumn
Sep–Nov
High: 18°C
Low: 9°C
Rainy days: 8 days/month
Month-by-Month Weather Table
January
February
March
April
May
BestJune
BestJuly
August
September
BestOctober
BestNovember
December
| Month | High | Low | Rainy days | Condition | View Details |
|---|---|---|---|---|---|
| January | 5°C | -3°C | 7 | Good | View Details → |
| February | 5°C | -3°C | 10 | Good | View Details → |
| March | 10°C | 0°C | 12 | Good | View Details → |
| April | 10°C | 2°C | 12 | Good | View Details → |
| May (best) | 19°C | 8°C | 8 | Excellent | View Details → |
| June (best) | 26°C | 16°C | 9 | Excellent | View Details → |
| July | 29°C | 20°C | 11 | Good | View Details → |
| August | 29°C | 19°C | 10 | Good | View Details → |
| September (best) | 24°C | 14°C | 6 | Excellent | View Details → |
| October (best) | 17°C | 8°C | 9 | Excellent | View Details → |
| November | 13°C | 4°C | 9 | Good | View Details → |
| December | 5°C | -3°C | 9 | Good | View Details → |
Boston
Freedom Trail history, Fenway Park, Ivy-league vibes across the Charles, seafood, and harbor charm.
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Common Questions
What type of climate does Boston have?
Boston has a Cool climate with average yearly temperatures of 16°C (highs) and 7°C (lows).
When is the best time to visit Boston?
The best time to visit Boston is during May, June, September, October, when temperatures average around 19°C and conditions are ideal for sightseeing.
What are the hottest and coldest months in Boston?
The hottest month in Boston is July with average highs of 29°C, while the coldest is January with average lows of -3°C.
When is the rainy season in Boston?
Boston sees the most rain in March (12 rainy days), while September is the driest month (6 rainy days).
More Boston Guides
Best Time to Visit
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Things to Do
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Itineraries
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Overview
Complete travel guide for Boston: top things to do, itineraries, and typical costs.