In January, Vacaville typically sees daytime highs of 12.4°C and overnight lows around 3.3°C. Compared to the annual average high of 23.0°C, January runs -10.6°C.
January in Vacaville averages a daytime high of 12.4°C and an overnight low of 3.3°C.
January runs -10.6°C compared to Vacaville's annual average high of 23.0°C, ranking #12 of 12 months by warmth.
Plan for daytime highs near 12.4°C and cooler evenings around 3.3°C.