Grangeville Weather Forecast

    • 55
    • 81

    Increasing Clouds

    • 54
    • 81

    Partly Sunny

    • 53
    • 80

    Mostly Sunny

    • 44
    • 68

    Chance Rain

    • 48
    • 72

    Mostly Sunny

    • 51
    • 80

    Mostly Sunny

Today 18 Sep Orofino/Grangeville Region

Mostly sunny. Highs in the 70s to upper 80s.

Tonight 18 Sep Orofino/Grangeville Region

Mostly clear. Lows in the 50s.

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Grangeville Temperature Statistics

September Temperature

Grangeville - Idaho County Airport (0.6 miles)

  • Lowest 16 September, 2025

    42.8 °F

  • Average September

    64.9 °F

  • Highest 2 September, 2025

    98.6 °F

Climate (2020–Present)

Grangeville - Idaho County Airport (0.6 miles)

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  • Average Low 2020–2025

    36.6 °F

  • Average 2020–2025

    47 °F

  • Average High 2020–2025

    57.6 °F
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