City in Massachusetts, United States
Boston weather by month and the best time to visit
When to go to Boston
May–Jun and Sep–Oct are mild and dry; autumn foliage peaks mid-Oct. Jul–Aug is humid; Dec–Mar is cold with heavy snow.
Boston weather by month
Average daily high, rainfall and conditions.
- Jan1°80 mm
- Feb2°86 mm
- Mar6°110 mm
- Apr13°106 mm
- May19°95 mm
- Jun24°113 mm
- Jul28°94 mm
- Aug28°93 mm
- Sep24°92 mm
- Oct16°123 mm
- Nov10°98 mm
- Dec4°116 mm
Monthly averages
| Month | High | Low | Rain | Humidity | Conditions |
|---|---|---|---|---|---|
| January | 1°C33°F | -7°C19°F | 80 mm | 88% | Freezing |
| February | 2°C35°F | -7°C20°F | 86 mm | 87% | Freezing |
| March | 6°C43°F | -3°C27°F | 110 mm | 82% | Cold |
| April | 13°C55°F | 2°C36°F | 106 mm | 79% | Cool |
| May | 19°C66°F | 8°C47°F | 95 mm | 79% | Pleasant |
| June | 24°C75°F | 14°C57°F | 113 mm | 79% | Pleasant |
| July | 28°C82°F | 18°C64°F | 94 mm | 75% | Pleasant |
| August | 28°C82°F | 17°C62°F | 93 mm | 73% | Pleasant |
| September | 24°C75°F | 13°C55°F | 92 mm | 74% | Pleasant |
| October | 16°C62°F | 7°C44°F | 123 mm | 79% | Cool |
| November | 10°C50°F | 1°C34°F | 98 mm | 82% | Cold |
| December | 4°C39°F | -3°C26°F | 116 mm | 86% | Cold |
Best months across United States
| Place | Best months | Warmest month |
|---|---|---|
| New York City | Apr–Jun, Sep–Oct | Jul (26°C) |
| Las Vegas | Mar–May, Oct–Nov | Jul (42°C) |
| Los Angeles | Mar–May, Sep–Nov | Aug (32°C) |
| Orlando | Feb–Apr, Nov | May (31°C) |
| Miami | Nov–Apr | Aug (30°C) |
| San Francisco | Apr–May, Sep–Oct | Sep (24°C) |
| Honolulu | Apr–Jun, Sep–Oct | Sep (28°C) |
| Washington, D.C. | Mar–May, Sep–Oct | Jul (31°C) |
| Chicago | May–Jun, Sep–Oct | Jul (25°C) |
| Boston | May–Jun, Sep–Oct | Jul (28°C) |
| New Orleans | Feb–Apr, Oct–Nov | Jul (30°C) |
| San Diego | Apr–May, Sep–Nov | Aug (32°C) |
| Seattle | Jun–Sep | Aug (24°C) |
| Maui | Apr–May, Sep–Oct | Sep (22°C) |
| Nashville | Apr–May, Sep–Oct | Aug (32°C) |
| Austin | Mar–May, Oct–Nov | Aug (36°C) |
| Miami Beach | Nov–Apr | Aug (30°C) |
| Key West | Dec–Apr | Aug (30°C) |
| Denver | May–Jun, Sep–Oct | Jul (33°C) |
| Philadelphia | Apr–May, Sep–Oct | Jul (30°C) |
| Portland | Jun–Sep | Aug (29°C) |
| Atlanta | Mar–May, Oct–Nov | Jul (32°C) |
| San Antonio | Mar–May, Oct–Nov | Aug (36°C) |
| Charleston | Mar–May, Oct–Nov | Jul (32°C) |
| Savannah | Mar–May, Oct–Nov | Jul (33°C) |
| Fort Lauderdale | Dec–Apr | Aug (30°C) |
| Kauai | Apr–Jun, Sep–Oct | Sep (27°C) |
| Big Island | Apr–Jun, Sep–Oct | Aug (26°C) |
| Sedona | Mar–May, Sep–Nov | Jul (35°C) |
| Scottsdale | Feb–Apr, Oct–Nov | Jul (42°C) |
Quick answers
What is the best month to visit Boston?
May–Jun, Sep–Oct. May–Jun and Sep–Oct are mild and dry; autumn foliage peaks mid-Oct. Jul–Aug is humid; Dec–Mar is cold with heavy snow.
When is the rainy season in Boston?
Rain peaks in October with about 123 mm. No month averages 150 mm or more.
What is the hottest month in Boston?
July, with average highs of 28°C (82°F).
How cold does Boston get?
The coolest nights are in January, averaging -7°C (19°F).
More about Boston
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Sources
- NASA POWER climatology (2001–2020)
- MBTA (the T)
- Massport (Boston Logan Airport)
- Meet Boston (tourism)
- Massachusetts Water Resources Authority
Climate averages are modelled from NASA POWER (MERRA-2) for 2001–2020 at about 50 km resolution, so coasts and valleys can differ a little. Compiled and reviewed by SoloSquare. How we compile and score this. Spotted something out of date? Tell us.