In January, San Clemente typically sees daytime highs of 18.7°C and overnight lows around 8.3°C. Compared to the annual average high of 22.2°C, January runs -3.4°C.
January in San Clemente averages a daytime high of 18.7°C and an overnight low of 8.3°C.
January runs -3.4°C compared to San Clemente's annual average high of 22.2°C, ranking #12 of 12 months by warmth.
Plan for daytime highs near 18.7°C and cooler evenings around 8.3°C.