In March, Castle Rock typically sees daytime highs of 9.7°C and overnight lows around -5.9°C. Compared to the annual average high of 16.8°C, March runs -7.0°C.
March in Castle Rock averages a daytime high of 9.7°C and an overnight low of -5.9°C.
March runs -7.0°C compared to Castle Rock's annual average high of 16.8°C, ranking #9 of 12 months by warmth.
Plan for daytime highs near 9.7°C and cooler evenings around -5.9°C.