In January, Santa Rosa typically sees daytime highs of 29.2°C and overnight lows around 21.7°C. Compared to the annual average high of 31.2°C, January runs -2.0°C.
January in Santa Rosa averages a daytime high of 29.2°C and an overnight low of 21.7°C.
January runs -2.0°C compared to Santa Rosa's annual average high of 31.2°C, ranking #12 of 12 months by warmth.
Plan for daytime highs near 29.2°C and cooler evenings around 21.7°C.