In January, Pleasanton typically sees daytime highs of 12.2°C and overnight lows around 4.2°C. Compared to the annual average high of 20.7°C, January runs -8.5°C.
January in Pleasanton averages a daytime high of 12.2°C and an overnight low of 4.2°C.
January runs -8.5°C compared to Pleasanton's annual average high of 20.7°C, ranking #12 of 12 months by warmth.
Plan for daytime highs near 12.2°C and cooler evenings around 4.2°C.