Typical December weather
San Diego
California · December
66° days
50° nights
about 3 rainy days · 10 hours of daylight · ocean 60°
What to pack
- Light jacket
What December feels like
December brings the rains back and, between them, the kind of low winter light that fills Sunset Cliffs every evening. Balboa Park's December Nights is the local holiday event; it is free, and it is packed.
Expect about 3 days with real rain — enough to notice, not enough to plan around. The air runs dry — whatever the thermometer says, it wears easy.
Can you swim?
The ocean runs about 60° — cold — a quick dip takes resolve.
The numbers
| Typical high | 66° |
|---|---|
| Typical low | 50° |
| Days with real rain | 3 |
| Total rain | 1.7 in |
| Humidity | dry air |
| Water temperature | 60° |
| Sunrise / sunset (mid-month) | 6:43 am / 4:44 pm |