In January, San Francisco typically sees daytime highs of 13.2°C and overnight lows around 4.8°C. Compared to the annual average high of 19.2°C, January runs -6.0°C.
January in San Francisco averages a daytime high of 13.2°C and an overnight low of 4.8°C.
January runs -6.0°C compared to San Francisco's annual average high of 19.2°C, ranking #12 of 12 months by warmth.
Plan for daytime highs near 13.2°C and cooler evenings around 4.8°C.