In October, Napa typically sees daytime highs of 24.1°C and overnight lows around 8.3°C. Compared to the annual average high of 21.5°C, October runs +2.6°C.
October in Napa averages a daytime high of 24.1°C and an overnight low of 8.3°C.
October runs +2.6°C compared to Napa's annual average high of 21.5°C, ranking #5 of 12 months by warmth.
Plan for daytime highs near 24.1°C and cooler evenings around 8.3°C.