Weather in San Diego in December
December in San Diego is mild enough that walking is the default. This is a city-break month more than a sea-holiday month.
In United States, this is how San Diego actually wears December, not how a country centroid would. December is the cold side of the year in San Diego. Pack for that, not for a leftover summer photo.
- Average temp
- 14°C
10–19°C
- Rainfall
- 42 mm
Not much rain
- Sunshine
- —
- Wind
- 8 km/h
What to expect
Daytime
Mild afternoons in San Diego are the prize in December. You can eat outside on the good days. You still want something for the breeze.
This is walking weather. Shade is useful, not essential the way it is in the hot months. A long outdoor day is a reasonable plan.
Rain
December is a wetter month in San Diego. Showers are part of the deal, not a spoiled surprise.
Waterproof shoes matter more than a rain plan for a beach, especially if a beach is not why you came. Build indoor hours into the afternoon.
Evening
Evenings are cooler. A layer helps after sunset.
What to pack
A layer for cooler evenings
Where to stay in San Diego
Dates are a starting point for December.
Travel guides for San Diego
What to read before you book.
Average weather in San Diego
TemperatureRainfall
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FAQs about San Diego
Climate averages for San Diego, 1991–2020.
The best time to visit San Diego is between May and October, the most comfortable stretch of the year on these averages.
August is the hottest month, with an average around 22°C.
February is the wettest month, with about 56 mm of rain.
No. These are 1991–2020 climate normals from Meteostat, not a live forecast. Actual weather in any given week can differ.
