Mark Twain National Wildlife Refuge Weather Forecast

    • 48
    • 57

    Rain Showers

    • 39
    • 56

    Rain Showers

    • 38
    • 57

    Mostly Sunny

    • 36
    • 60

    Partly Sunny

    • 35
    • 54

    Partly Sunny

    • 41
    • 59

    Mostly Sunny

    • 38
    • 64

    Mostly Sunny

Today 28 Oct Calhoun

Cloudy with a chance of drizzle. Near steady temperature in the mid 50s. East Winds 5 to 10 Mph.

Tonight 28 Oct Calhoun

Showers. Patchy fog. Near steady temperature in the lower 50s. East Winds around 5 Mph, becoming northeast 10 to 15 Mph with Gusts up to 25 Mph. Chance of rain near 100 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Mark Twain National Wildlife Refuge Temperature Statistics

October Temperature

St. Charles, St. Charles County Smartt Airport (19.3 miles)

  • Lowest 24 October, 2025

    34 °F

  • Average October

    63.6 °F

  • Highest 3 October, 2025

    90 °F

Climate (2020–Present)

St. Charles, St. Charles County Smartt Airport (19.3 miles)

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  • Average Low 2020–2025

    47.4 °F

  • Average 2020–2025

    57.8 °F

  • Average High 2020–2025

    68.5 °F
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