In February, Saint Charles typically sees daytime highs of 6.4°C and overnight lows around -4.4°C. Compared to the annual average high of 18.7°C, February runs -12.3°C.
February in Saint Charles averages a daytime high of 6.4°C and an overnight low of -4.4°C.
February runs -12.3°C compared to Saint Charles's annual average high of 18.7°C, ranking #10 of 12 months by warmth.
Plan for daytime highs near 6.4°C and cooler evenings around -4.4°C.