San Diego, California Weather in December
United States · December climate averages and travel tips
Avg high19°C (66°F)
Avg low10°C (50°F)
Rainfall51 mm (2.0 in)
RatingExcellent 9.7/10
In December, San Diego has average highs of 19°C (66°F) and lows of 10°C (50°F). December is winter in United States. The month is fairly dry, with about 51 mm (2.0 in) of rain spread over 5 days. You get roughly 9.9 hours of daylight and a mix of sun and cloud.
Is December a good time to visit San Diego?
Yes — December is one of the best months to visit San Diego. The weather rates excellent (9.7/10) on our comfort score.
December weather at a glance
| Average high | 19°C (66°F) |
|---|---|
| Average low | 10°C (50°F) |
| Daily mean | 14°C (56°F) |
| Rainfall | 51 mm (2.0 in) |
| Rainy days (1 mm+) | 5 |
| Humidity | 64% |
| Cloud cover | 53% |
| Daylight | 9.9 hours |
| Est. sunshine | 5.1 hours/day |
| Wind | 8.6 km/h |
| vs November | 4°C cooler than November, with 26 mm more rain. |
What to pack for San Diego in December
- T-shirts plus a light layer for the evening
- a sweater for cool nights
San Diego weather in other months
Jan19°C / 10°C51 mmExcellentFeb19°C / 10°C52 mmExcellentMar20°C / 11°C39 mmExcellentApr22°C / 12°C15 mmExcellentMay24°C / 13°C8 mmExcellentJun27°C / 15°C14 mmExcellentJul31°C / 18°C4 mmGoodAug32°C / 19°C6 mmGoodSep30°C / 19°C6 mmExcellentOct27°C / 16°C9 mmExcellentNov23°C / 13°C25 mmExcellentDec19°C / 10°C51 mmExcellent
← NovemberBest time to visit San DiegoJanuary →
Nearby in December
- Tijuana19°C · 51 mm
- Mexicali21°C · 19 mm
- Los Angeles, California19°C · 72 mm
- Las Vegas, Nevada15°C · 17 mm
- Phoenix, Arizona20°C · 34 mm
- San Francisco, California14°C · 123 mm
Where else is good in December? See where to go in December.