In March, St. Louis typically sees daytime highs of 12.5°C and overnight lows around 1.1°C. Compared to the annual average high of 19.0°C, March runs -6.5°C.
March in St. Louis averages a daytime high of 12.5°C and an overnight low of 1.1°C.
March runs -6.5°C compared to St. Louis's annual average high of 19.0°C, ranking #9 of 12 months by warmth.
Plan for daytime highs near 12.5°C and cooler evenings around 1.1°C.