‹ San Francisco weather by month
Typical December weather
San Francisco
California · December
58° days
47° nights
about 8 rainy days · 9½ hours of daylight · ocean 55°
What to pack
- Sweater
- Umbrella
What December feels like
December's storm trains are the ones that make the news, and they bring the season's biggest surf to Ocean Beach — beautiful, and genuinely dangerous. In between, the lights go up and the crowds head for Union Square.
Rain arrives about 8 days of the month, so keep one flexible day in your plans.
Can you swim?
The ocean runs about 55° — frigid — locals in wetsuits only.
The numbers
| Typical high | 58° |
|---|---|
| Typical low | 47° |
| Days with real rain | 8 |
| Total rain | 4.8 in |
| Water temperature | 55° |
| Sunrise / sunset (mid-month) | 7:18 am / 4:51 pm |