In January, Gilroy typically sees daytime highs of 13.5°C and overnight lows around 1.9°C. Compared to the annual average high of 21.3°C, January runs -7.8°C.
January in Gilroy averages a daytime high of 13.5°C and an overnight low of 1.9°C.
January runs -7.8°C compared to Gilroy's annual average high of 21.3°C, ranking #12 of 12 months by warmth.
Plan for daytime highs near 13.5°C and cooler evenings around 1.9°C.