Grand River State Wildlife Area Weather Forecast

    • 60
    • 84

    Slight Chance Thunderstorms

    • 60
    • 79

    Rain Showers Likely

    • 59
    • 77

    Chance Thunderstorms

    • 60
    • 77

    Chance Thunderstorms

    • 57
    • 77

    Chance Rain Showers

    • 54
    • 75

    Partly Sunny

Today 18 Sep Green Lake

Partly sunny. A 20 percent chance of light Showers and Thunderstorms late in the afternoon. Highs in the lower 80s. East Winds up to 10 Mph.

Tonight 18 Sep Green Lake

Partly cloudy with slight chance of light Showers and Thunderstorms in the Evening, then mostly cloudy with slight chance of light Showers in the late evening and early morning. Mostly cloudy early in the morning. Lows around 60. East Winds 5 to 10 Mph. Chance of precipitation 20 percent.

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Grand River State Wildlife Area Temperature Statistics

September Temperature

Wautoma, Wautoma Municipal Airport (22.4 miles)

  • Lowest 8 September, 2025

    35.1 °F

  • Average September

    60.5 °F

  • Highest 15 September, 2025

    84 °F

Climate (2020–Present)

Wautoma, Wautoma Municipal Airport (22.4 miles)

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  • Average Low 2020–2025

    36.7 °F

  • Average 2020–2025

    47.6 °F

  • Average High 2020–2025

    57.5 °F
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