What to Wear in San Diego in December
Mild, cooler nights. Expect 9°–18°C with 5 rainy days on average.
☀️
High
18°C
🌙
Low
9°C
🌧️
Rain days
5
🌡️
Feel
Pleasantly Cool
Typical outfit
~14°C average
About December in San Diego
December in San Diego typically brings mild, cooler nights. With averages of 9°–18°C, the conditions call for fresh and crisp weather — the perfect excuse for cozy knits and stylish layering.
Think in layers: a thermal base, a knit mid-layer, and a windproof outer. You can strip back as the day warms.
December in other cities