In October, Rockville typically sees daytime highs of 19.9°C and overnight lows around 6.7°C. Compared to the annual average high of 18.5°C, October runs +1.3°C.
October in Rockville averages a daytime high of 19.9°C and an overnight low of 6.7°C.
October runs +1.3°C compared to Rockville's annual average high of 18.5°C, ranking #6 of 12 months by warmth.
Plan for daytime highs near 19.9°C and cooler evenings around 6.7°C.