Mark Twain National Wildlife Refuge Weather Forecast

    • 65
    • 86

    Sunny

    • 67
    • 87

    Chance Rain Showers

    • 66
    • 84

    Rain Showers

    • 63
    • 80

    Chance Rain Showers

    • 63
    • 83

    Mostly Sunny

    • 65
    • 85

    Mostly Sunny

    • 67
    • 88

    Mostly Sunny

Today 29 Jul Calhoun

Sunny. Near steady temperature in the mid 80s. Northeast Winds 5 to 10 Mph.

Tonight 29 Jul Calhoun

Clear. Lows in the mid 60s. Northeast Winds around 5 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Mark Twain National Wildlife Refuge Temperature Statistics

July Temperature

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

  • Lowest 23 July, 2026

    61.6 °F

  • Average July

    80.5 °F

  • Highest 26 July, 2026

    98.7 °F

Climate (2021–2026)

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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