In January, San Francisco typically sees daytime highs of 25.0°C and overnight lows around 15.5°C. Compared to the annual average high of 25.2°C, January runs -0.2°C.
January in San Francisco averages a daytime high of 25.0°C and an overnight low of 15.5°C.
January runs -0.2°C compared to San Francisco's annual average high of 25.2°C, ranking #5 of 12 months by warmth.
Plan for daytime highs near 25.0°C and cooler evenings around 15.5°C.