Mark Twain National Wildlife Refuge Weather Forecast

    • 55
    • 75

    Becoming Sunny

    • 61
    • 77

    Chance Rain Showers

    • 59
    • 80

    Chance Thunderstorms

    • 68
    • 87

    Rain Showers

    • 58
    • 80

    Chance Rain Showers

    • 61
    • 83

    Partly Sunny

    • 67
    • 86

    Slight Chance Thunderstorms

Today 14 Jun Calhoun

Sunny. Near steady temperature in the mid 70s. Northwest Winds 10 to 15 Mph with Gusts up to 25 Mph.

Tonight 14 Jun Calhoun

Mostly clear. Cooler with Lows in the lower 50s. Northwest Winds 10 to 15 Mph, Diminishing to around 5 Mph after midnight.

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Mark Twain National Wildlife Refuge Temperature Statistics

June Temperature

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

  • Lowest 3 June, 2026

    56.6 °F

  • Average June

    77.5 °F

  • Highest 9 June, 2026

    92.6 °F

Climate (2021–Present)

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

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  • Average Low 2021–2026

    47.3 °F

  • Average 2021–2026

    58 °F

  • Average High 2021–2026

    69 °F
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