In March, Saint Peters typically sees daytime highs of 12.2°C and overnight lows around 0.1°C. Compared to the annual average high of 18.9°C, March runs -6.6°C.
March in Saint Peters averages a daytime high of 12.2°C and an overnight low of 0.1°C.
March runs -6.6°C compared to Saint Peters's annual average high of 18.9°C, ranking #9 of 12 months by warmth.
Plan for daytime highs near 12.2°C and cooler evenings around 0.1°C.