SeasonMapBoston vs San Francisco in December
San Francisco is the better pick in December — 67 vs 46 on SeasonMap's comfort score. San Francisco is cool, rainy, clean air, while Boston is cold, rainy, clean air.
Boston vs San Francisco — December climate, side by side
| Boston | San Francisco | |
|---|---|---|
| Comfort score | 46/100 (F) | 67/100 (C) |
| Feels-like high | 1°C | 13°C |
| Avg high / low | 6° / -2° | 15° / 9° |
| Rainfall | 109 mm | 121 mm |
| Rainy days | 9 | 9 |
| Humidity | 72% | 82% |
| Air quality (AQI) | 40 | 50 |
Monthly climate normals (ERA5 reanalysis). Comfort scores are SeasonMap estimates.
Boston vs San Francisco in December — FAQ
- Is December better in Boston or San Francisco?
- San Francisco is the better pick in December — 67 vs 46 on SeasonMap's comfort score. San Francisco is cool, rainy, clean air, while Boston is cold, rainy, clean air.
- What is the weather like in Boston vs San Francisco in December?
- In December, Boston averages 6°C high / -2°C low with about 109 mm of rain; San Francisco averages 15°C high / 9°C low with about 121 mm.