Square Lake Weather Forecast

    • 44
    • 65

    Mostly Sunny

    • 41
    • 67

    Chance Rain

    • 41
    • 59

    Partly Sunny

    • 35
    • 60

    Rain/Snow

    • 32
    • 40

    Rain/Snow

    • 34
    • 50

    Mostly Sunny

    • 37
    • 54

    Partly Sunny

Today 9 Sep Southern Clearwater Mountains

Mostly sunny. Patchy fog early in the morning. Highs 66 to 81.

Tonight 9 Sep Southern Clearwater Mountains

Mostly clear. Lows 38 to 53.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Square Lake Temperature Statistics

September Temperature

Grangeville - Idaho County Airport (33.6 miles)

  • Lowest 5 September, 2026

    41 °F

  • Average September

    54.8 °F

  • Highest 1 September, 2026

    82.4 °F

Climate (2021–2026)

Grangeville - Idaho County Airport (33.6 miles)

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  • Average Low 2021–2026

    37 °F

  • Average 2021–2026

    47.3 °F

  • Average High 2021–2026

    57.9 °F
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