Sweet Marsh State Wildlife Management Area Weather Forecast

    • 45
    • 60

    Mostly Cloudy

    • 50
    • 64

    Rain Showers Likely

    • 49
    • 73

    Mostly Cloudy

    • 52
    • 77

    Mostly Sunny

    • 56
    • 82

    Partly Sunny

    • 59
    • 84

    Slight Chance Thunderstorms

Today 21 May Bremer

Mostly cloudy. Highs around 60. East Winds 10 to 15 Mph.

Tonight 21 May Bremer

Mostly cloudy. Near steady temperature in the upper 40s. East Winds 5 to 10 Mph.

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Sweet Marsh State Wildlife Management Area Temperature Statistics

May Temperature

Oelwein Municipal Airport (16.2 miles)

  • Lowest 6 May, 2026

    30.2 °F

  • Average May

    57.4 °F

  • Highest 15 May, 2026

    84.2 °F

Climate (2021–Present)

Oelwein Municipal Airport (16.2 miles)

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  • Average Low 2021–2026

    38.7 °F

  • Average 2021–2026

    48.5 °F

  • Average High 2021–2026

    58.2 °F
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