Grafton Weather Forecast

    • 18
    • 39

    Becoming Sunny

    • 29
    • 33

    Chance Snow

    • 19
    • 43

    Mostly Cloudy

    • 9
    • 26

    Partly Sunny

    • 15
    • 25

    Partly Sunny

    • 13
    • 29

    Mostly Sunny

Today 14 Jan Jersey

Partly sunny. Scattered Flurries this morning. Breezy and much cooler with Highs in the upper 30s. Temperature falling into the upper 20s this afternoon. Northwest Winds 15 to 25 Mph with Gusts up to 35 Mph.

Tonight 14 Jan Jersey

Clear. Much cooler with Lows around 16. Northwest Winds 10 to 15 Mph. Gusts up to 30 Mph in the evening. Wind chill Values as low as 5 above.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Grafton Temperature Statistics

January Temperature

St. Charles, St. Charles County Smartt Airport (2.5 miles)

  • Lowest 12 January, 2026

    23 °F

  • Average January

    45.1 °F

  • Highest 6 January, 2026

    66 °F

Climate (2021–Present)

St. Charles, St. Charles County Smartt Airport (2.5 miles)

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  • Average Low 2021–2026

    47.5 °F

  • Average 2021–2026

    57.9 °F

  • Average High 2021–2026

    68.6 °F
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