In January, St. Louis typically sees daytime highs of 3.8°C and overnight lows around -6.0°C. Compared to the annual average high of 19.0°C, January runs -15.3°C.
January in St. Louis averages a daytime high of 3.8°C and an overnight low of -6.0°C.
January runs -15.3°C compared to St. Louis's annual average high of 19.0°C, ranking #12 of 12 months by warmth.
Plan for daytime highs near 3.8°C and cooler evenings around -6.0°C.