In August, Castle Rock typically sees daytime highs of 28.2°C and overnight lows around 11.6°C. Compared to the annual average high of 16.8°C, August runs +11.4°C.
August in Castle Rock averages a daytime high of 28.2°C and an overnight low of 11.6°C.
August runs +11.4°C compared to Castle Rock's annual average high of 16.8°C, ranking #2 of 12 months by warmth.
Plan for daytime highs near 28.2°C and cooler evenings around 11.6°C.