In March, Wheaton typically sees daytime highs of 7.0°C and overnight lows around -2.9°C. Compared to the annual average high of 14.7°C, March runs -7.7°C.
March in Wheaton averages a daytime high of 7.0°C and an overnight low of -2.9°C.
March runs -7.7°C compared to Wheaton's annual average high of 14.7°C, ranking #9 of 12 months by warmth.
Plan for daytime highs near 7.0°C and cooler evenings around -2.9°C.