SeasonMapPortland vs San Francisco in December
San Francisco is the better pick in December — 67 vs 45 on SeasonMap's comfort score. San Francisco is cool, rainy, clean air, while Portland is cold, soaked, clean air.
Portland vs San Francisco — December climate, side by side
| Portland | San Francisco | |
|---|---|---|
| Comfort score | 45/100 (F) | 67/100 (C) |
| Feels-like high | 6°C | 13°C |
| Avg high / low | 8° / 4° | 15° / 9° |
| Rainfall | 184 mm | 121 mm |
| Rainy days | 18 | 9 |
| Humidity | 88% | 82% |
| Air quality (AQI) | 34 | 50 |
Monthly climate normals (ERA5 reanalysis). Comfort scores are SeasonMap estimates.
Portland vs San Francisco in December — FAQ
- Is December better in Portland or San Francisco?
- San Francisco is the better pick in December — 67 vs 45 on SeasonMap's comfort score. San Francisco is cool, rainy, clean air, while Portland is cold, soaked, clean air.
- What is the weather like in Portland vs San Francisco in December?
- In December, Portland averages 8°C high / 4°C low with about 184 mm of rain; San Francisco averages 15°C high / 9°C low with about 121 mm.