San Diego weather by month › December
San Diego in December: weather and what to expect
It’s fine, but not the best. March to April and October are more pleasant.
December weather in San Diego
Daytime high69°F 20°C
Night low47°F 9°C
Rain1.6 in 41 mm
AirDry
SunModerate sun
In December, San Diego averages highs of 69°F (20°C) and lows of 47°F (9°C), with 1.6 in (41 mm) of rain. The air feels dry and the sun is moderate. 1991–2020 averages, not a forecast.
Pack: light layers, a sweater for evenings.
Places with the same weather in December
Match out of 100 for December, one city per country.
Jan · Feb · Mar · Apr · May · Jun · Jul · Aug · Sep · Oct · Nov · Dec