Sweet Marsh State Wildlife Management Area Weather Forecast

    • 35
    • 41

    Mostly Cloudy

    • 38
    • 44

    Mostly Cloudy

    • 6
    • 39

    Chance Rain/Snow

    • 7
    • 17

    Mostly Sunny

    • 14
    • 30

    Mostly Cloudy

    • 9
    • 26

    Mostly Cloudy

Today 26 Dec Bremer

Mostly cloudy. A chance of rain with a slight chance of very light drizzle after midnight. Widespread dense fog after midnight. Highs in the lower 40s. Northwest Winds 5 to 10 Mph. Chance of rain 30 percent.

Tonight 26 Dec Bremer

Mostly cloudy. Areas of fog. Near steady temperature in the mid 30s. Southeast Winds 5 to 10 Mph.

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Sweet Marsh State Wildlife Management Area Temperature Statistics

December Temperature

Oelwein Municipal Airport (16.2 miles)

  • Lowest 4 December, 2025

    -11.2 °F

  • Average December

    18.6 °F

  • Highest 9 December, 2025

    39.2 °F

Climate (2020–Present)

Oelwein Municipal Airport (16.2 miles)

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  • Average Low 2020–2025

    38.4 °F

  • Average 2020–2025

    48.2 °F

  • Average High 2020–2025

    57.9 °F
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