In February, Castro Valley typically sees daytime highs of 15.4°C and overnight lows around 6.4°C. Compared to the annual average high of 20.0°C, February runs -4.6°C.
February in Castro Valley averages a daytime high of 15.4°C and an overnight low of 6.4°C.
February runs -4.6°C compared to Castro Valley's annual average high of 20.0°C, ranking #10 of 12 months by warmth.
Plan for daytime highs near 15.4°C and cooler evenings around 6.4°C.