In October, St. Louis typically sees daytime highs of 21.1°C and overnight lows around 7.9°C. Compared to the annual average high of 19.0°C, October runs +2.1°C.
October in St. Louis averages a daytime high of 21.1°C and an overnight low of 7.9°C.
October runs +2.1°C compared to St. Louis's annual average high of 19.0°C, ranking #6 of 12 months by warmth.
Plan for daytime highs near 21.1°C and cooler evenings around 7.9°C.