🇺🇸 Boston vs San Francisco 🇺🇸
Boston, United States vs San Francisco, United States — a side-by-side climate comparison to help you pick. San Francisco is the warmer of the two — about 4 degrees warmer on average across the year. San Francisco is drier, with roughly 60 fewer rainy days a year.
Warmer · San FranciscoDrier · San Francisco
Climate at a glance
| 🇺🇸 Boston | 🇺🇸 San Francisco | |
|---|---|---|
| Avg annual high | 15°C | 19°C |
| Hottest month | July · 28°C | September · 24°C |
| Coldest month | January (-6°C low) | January (8°C low) |
| Rainy days / year | 124 | 64 |
| Snow | Yes | Rare |
| Best months to visit | May, June, September | June, July, August |
🇺🇸 Boston
Best around May, June, September. Hottest in July (28°C), coldest lows in January (-6°C).
🇺🇸 San Francisco
Best around June, July, August. Hottest in September (24°C), coldest lows in January (8°C).
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Frequently asked questions
Is Boston or San Francisco warmer?
San Francisco is warmer overall, averaging about 4 degrees higher across the year.
Which is rainier, Boston or San Francisco?
Boston is rainier — San Francisco sees about 60 fewer rainy days per year.
When is the best time to visit Boston vs San Francisco?
Boston is best around May, June, September; San Francisco is best around June, July, August.