Granite Falls Weather Forecast

    • 61
    • 75

    Chance Thunderstorms

    • 57
    • 71

    Rain Showers Likely

    • 59
    • 72

    Chance Rain Showers

    • 60
    • 80

    Chance Rain Showers

    • 54
    • 78

    Slight Chance Thunderstorms

    • 53
    • 74

    Mostly Sunny

Today 18 Sep Yellow Medicine

Mostly cloudy. Slight chance of Thunderstorms early in the morning. Slight chance of Showers in the late morning and early Afternoon, then chance of Showers and slight chance of Thunderstorms late in the afternoon. Highs in the mid 70s. Southeast Winds 5 to 10 Mph. Chance of precipitation 40 percent.

Tonight 18 Sep Yellow Medicine

Mostly cloudy. Chance of Thunderstorms in the Evening, then chance of rain Showers and slight chance of Thunderstorms after midnight. Lows around 60. Southeast Winds up to 5 Mph. Chance of precipitation 50 percent.

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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

    64.4 °F
  • Highest 14 September, 2025

    89.8 °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

    37 °F
  • Average 2020–2025

    47.5 °F
  • Average High 2020–2025

    57.9 °F
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