In October, Castle Rock typically sees daytime highs of 18.5°C and overnight lows around 1.1°C. Compared to the annual average high of 16.8°C, October runs +1.7°C.
October in Castle Rock averages a daytime high of 18.5°C and an overnight low of 1.1°C.
October runs +1.7°C compared to Castle Rock's annual average high of 16.8°C, ranking #6 of 12 months by warmth.
Plan for daytime highs near 18.5°C and cooler evenings around 1.1°C.