Mark Twain National Wildlife Refuge Weather Forecast

    • 41
    • 65

    Chance Rain Showers

    • 42
    • 60

    Partly Sunny

    • 40
    • 61

    Mostly Sunny

    • 55
    • 74

    Chance Thunderstorms

    • 55
    • 78

    Slight Chance Thunderstorms

    • 51
    • 74

    Rain Showers Likely

Today 30 Apr Calhoun

Mostly sunny. Highs in the mid 60s. Southwest Winds 5 to 10 Mph.

Tonight 30 Apr Calhoun

Mostly cloudy with a chance of Showers with a slight chance of Thunderstorms in the Evening, then partly cloudy after midnight. Lows in the lower 40s. Northwest Winds around 5 Mph. Chance of rain 50 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Mark Twain National Wildlife Refuge Temperature Statistics

April Temperature

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

  • Lowest 19 April, 2026

    37.9 °F

  • Average April

    62.5 °F

  • Highest 14 April, 2026

    91.7 °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

    57.9 °F

  • Average High 2021–2026

    68.9 °F
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