Average temperatures, rainfall and packing tips for San Diego, United States in December
🌡️ Avg high
18°C
🌙 Avg low
9°C
🌧️ Rainfall
~1 mm
📊 Warmth rank
#9 of 12
December in San Diego at a glance
December in San Diego is typically mild, with average daytime highs around 18°C and nights near 9°C. Temperature-wise it sits mid-range for San Diego (the 9th warmest month).
December is essentially dry in San Diego - rainfall is negligible on average.
What to pack for San Diego in December
Medium layers: long sleeves and a sweater
A light-to-medium jacket
San Diego - year at a glance
HighLow · December highlighted
Is December a good time to visit San Diego?
🧳 December is one of the most comfortable months to visit San Diego - daytime temperatures sit in a pleasant range and it's a good pick for sightseeing and time outdoors.
In December, San Diego averages a daytime high of about 18°C and a night-time low of around 9°C, based on recent historical data.
Does it rain in San Diego in December?
December is essentially dry in San Diego - rainfall is negligible on average.
Is December a good time to visit San Diego?
December is one of the most comfortable months to visit San Diego - daytime temperatures sit in a pleasant range and it's a good pick for sightseeing and time outdoors.