In April, Castle Rock typically sees daytime highs of 14.7°C and overnight lows around -1.2°C. Compared to the annual average high of 16.8°C, April runs -2.1°C.
April in Castle Rock averages a daytime high of 14.7°C and an overnight low of -1.2°C.
April runs -2.1°C compared to Castle Rock's annual average high of 16.8°C, ranking #7 of 12 months by warmth.
Plan for daytime highs near 14.7°C and cooler evenings around -1.2°C.