Grangeville Weather Forecast

    • 42
    • 63

    Slight Chance Thunderstorms

    • 41
    • 63

    Partly Sunny

    • 43
    • 66

    Mostly Sunny

    • 45
    • 71

    Mostly Sunny

    • 46
    • 75

    Partly Sunny

    • 46
    • 74

    Partly Sunny

Today 19 May Orofino/Grangeville Region

Partly cloudy. A 20 percent chance of Showers and Thunderstorms late in the afternoon. Highs in the 60s to lower 70s.

Tonight 19 May Orofino/Grangeville Region

Partly cloudy. A 20 percent chance of rain in the evening. Lows in the 40s.

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Grangeville Temperature Statistics

May Temperature

Grangeville - Idaho County Airport (0.6 miles)

  • Lowest 16 May, 2026

    32 °F

  • Average May

    53.7 °F

  • Highest 12 May, 2026

    80.6 °F

Climate (2021–Present)

Grangeville - Idaho County Airport (0.6 miles)

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  • Average Low 2021–2026

    37.1 °F

  • Average 2021–2026

    47.5 °F

  • Average High 2021–2026

    58 °F
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