Granite Falls Weather Forecast

    • 64
    • 85

    Becoming Sunny

    • 63
    • 91

    Mostly Sunny

    • 62
    • 83

    Rain Showers Likely

    • 60
    • 76

    Chance Thunderstorms

    • 59
    • 73

    Chance Thunderstorms

    • 58
    • 73

    Mostly Cloudy

Today 15 Sep Yellow Medicine

Mostly cloudy then becoming mostly sunny in the morning then becoming sunny. Highs in the mid 80s. South Winds 10 to 15 Mph.

Tonight 15 Sep Yellow Medicine

Clear. Lows in the mid 60s. South Winds 5 to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Granite Falls Temperature Statistics

September Temperature

Granite Falls, Granite Falls Municipal Airport/Lenzen-Roe Memorial Field (3.7 miles)

  • Lowest 7 September, 2025

    37.4 °F

  • Average September

    61.7 °F

  • Highest 1 September, 2025

    82.4 °F

Climate (2020–Present)

Granite Falls, Granite Falls Municipal Airport/Lenzen-Roe Memorial Field (3.7 miles)

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  • Average Low 2020–2025

    36.9 °F

  • Average 2020–2025

    47.5 °F

  • Average High 2020–2025

    57.9 °F
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