In December, Saint Peters typically sees daytime highs of 28.0°C and overnight lows around 22.5°C. Compared to the annual average high of 29.2°C, December runs -1.1°C.
December in Saint Peters averages a daytime high of 28.0°C and an overnight low of 22.5°C.
December runs -1.1°C compared to Saint Peters's annual average high of 29.2°C, ranking #10 of 12 months by warmth.
Plan for daytime highs near 28.0°C and cooler evenings around 22.5°C.