In October, Santa Rosa typically sees daytime highs of 23.0°C and overnight lows around 8.2°C. Compared to the annual average high of 20.4°C, October runs +2.6°C.
October in Santa Rosa averages a daytime high of 23.0°C and an overnight low of 8.2°C.
October runs +2.6°C compared to Santa Rosa's annual average high of 20.4°C, ranking #5 of 12 months by warmth.
Plan for daytime highs near 23.0°C and cooler evenings around 8.2°C.