The weather in San Clemente in January is hot. The average temperatures are between 18°C and 30°C. Usually the days in January are hot while the nights are a bit cooler.
You can expect rain for roughly half of the month of January 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 January 2026.
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
30° / 18°
Rainy Days
8
Snowy Days
0
Dry Days
23
Rainfall
162
mm
Sun Hours
11.1
Hrs
