The temperatures in San Clemente in December are comfortable with low of 62°F and and high up to 84°F.
You can expect rain for roughly half of the month of December in San Clemente. We’re expecting roughly 8 to 15 days of rain, so your rubber boots and umbrella are going to see plenty of use this month if you’re keen on staying dry.
Our weather forecast can give you a great sense of what weather to expect in San Clemente in December 2025.
If you’re planning to visit San Clemente in the near future, we highly recommend that you review the 14 day weather forecast for San Clemente before you arrive.
Temperatures
84° / 62°
Rainy Days
8
Snowy Days
0
Dry Days
23
Rainfall
5.43
in
Sun Hours
11.5
Hrs
