In October, Vallejo typically sees daytime highs of 23.5°C and overnight lows around 9.2°C. Compared to the annual average high of 20.8°C, October runs +2.7°C.
October in Vallejo averages a daytime high of 23.5°C and an overnight low of 9.2°C.
October runs +2.7°C compared to Vallejo's annual average high of 20.8°C, ranking #5 of 12 months by warmth.
Plan for daytime highs near 23.5°C and cooler evenings around 9.2°C.