In January, Rocklin typically sees daytime highs of 12.1°C and overnight lows around 2.5°C. Compared to the annual average high of 22.9°C, January runs -10.9°C.
January in Rocklin averages a daytime high of 12.1°C and an overnight low of 2.5°C.
January runs -10.9°C compared to Rocklin's annual average high of 22.9°C, ranking #12 of 12 months by warmth.
Plan for daytime highs near 12.1°C and cooler evenings around 2.5°C.