Sweet Marsh State Wildlife Management Area Weather Forecast

    • 63
    • 69

    Rain Showers

    • 57
    • 73

    Rain Showers Likely

    • 50
    • 65

    Chance Rain Showers

    • 46
    • 59

    Chance Rain Showers

    • 44
    • 60

    Partly Sunny

    • 47
    • 63

    Partly Sunny

Today 18 Sep Bremer

Mostly cloudy with a slight chance of Showers and Thunderstorms. Near steady temperature in the upper 60s. Southeast Winds around 15 Mph with Gusts up to 25 Mph. Chance of rain 20 percent.

Tonight 18 Sep Bremer

A chance of Thunderstorms. Showers. Some Thunderstorms may produce heavy rainfall. Humid. Near steady temperature in the mid 60s. Southeast Winds 10 to 15 Mph with Gusts up to 25 Mph. Chance of rain 80 percent.

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Sweet Marsh State Wildlife Management Area Temperature Statistics

September Temperature

Oelwein Municipal Airport (16.2 miles)

  • Lowest 13 September, 2026

    50 °F

  • Average September

    69.6 °F

  • Highest 4 September, 2026

    89.6 °F

Climate (2021–2026)

Oelwein Municipal Airport (16.2 miles)

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  • Average Low 2021–2026

    38.5 °F

  • Average 2021–2026

    48.2 °F

  • Average High 2021–2026

    57.9 °F
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