Upper Mississippi Conservation Area Weather Forecast

    • 20
    • 35

    Cloudy

    • 2
    • 24

    Snow Likely

    • 6
    • 13

    Mostly Sunny

    • 25
    • 39

    Partly Sunny

    • 36
    • 49

    Mostly Cloudy

    • 44
    • 56

    Mostly Cloudy

Today 12 Dec Lincoln

Cloudy. Highs in the mid 30s. North Winds around 5 Mph.

Tonight 12 Dec Lincoln

Mostly cloudy. Cooler with Lows around 20. Northwest Winds 5 to 10 Mph.

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  • Temperature Real-Time

Upper Mississippi Conservation Area Temperature Statistics

December Temperature

St. Charles, St. Charles County Smartt Airport (22.4 miles)

  • Lowest 5 December, 2025

    8.1 °F

  • Average December

    28 °F

  • Highest 9 December, 2025

    54 °F

Climate (2020–Present)

St. Charles, St. Charles County Smartt Airport (22.4 miles)

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  • Average Low 2020–2025

    47.4 °F

  • Average 2020–2025

    57.8 °F

  • Average High 2020–2025

    68.4 °F
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