In January, Saint Charles typically sees daytime highs of 3.3°C and overnight lows around -6.9°C. Compared to the annual average high of 18.7°C, January runs -15.4°C.
January in Saint Charles averages a daytime high of 3.3°C and an overnight low of -6.9°C.
January runs -15.4°C compared to Saint Charles's annual average high of 18.7°C, ranking #12 of 12 months by warmth.
Plan for daytime highs near 3.3°C and cooler evenings around -6.9°C.