Whetstone Lake Weather Forecast

    • 36
    • 54

    Decreasing Clouds

    • 39
    • 58

    Partly Sunny

    • 40
    • 62

    Mostly Sunny

    • 42
    • 64

    Mostly Sunny

    • 47
    • 67

    Partly Sunny

    • 43
    • 67

    Partly Sunny

Today 30 Sep Bitterroot/Sapphire Mountains

Mostly sunny. A 40 percent chance of rain Showers in the morning. Patchy fog early in the morning. Highs in the upper 50s to mid 60s.

Tonight 30 Sep Bitterroot/Sapphire Mountains

Partly cloudy. Patchy fog after midnight. Lows in the mid 30s to lower 40s.

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  • Temperature Real-Time

Whetstone Lake Temperature Statistics

September Temperature

Butte, Bert Mooney Airport (54.1 miles)

  • Lowest 27 September, 2026

    27 °F

  • Average September

    55 °F

  • Highest 25 September, 2026

    80.7 °F

Climate (2021–2026)

Butte, Bert Mooney Airport (54.1 miles)

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  • Average Low 2021–2026

    28.5 °F

  • Average 2021–2026

    42.3 °F

  • Average High 2021–2026

    55.7 °F
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