In January, San Jose typically sees daytime highs of 13.0°C and overnight lows around 3.4°C. Compared to the annual average high of 21.3°C, January runs -8.3°C.
January in San Jose averages a daytime high of 13.0°C and an overnight low of 3.4°C.
January runs -8.3°C compared to San Jose's annual average high of 21.3°C, ranking #12 of 12 months by warmth.
Plan for daytime highs near 13.0°C and cooler evenings around 3.4°C.