Coolwater Lake Weather Forecast

    • 49
    • 67

    Mostly Sunny

    • 47
    • 69

    Rain Likely

    • 45
    • 61

    Partly Sunny

    • 40
    • 63

    Rain

    • 39
    • 44

    Rain

    • 40
    • 54

    Mostly Sunny

    • 41
    • 59

    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

Coolwater Lake Temperature Statistics

September Temperature

Lowell (6.8 miles)

  • Lowest 5 September, 2026

    48.9 °F

  • Average September

    58.6 °F

  • Highest 5 September, 2026

    81 °F

Climate (2021–2026)

Lowell (6.8 miles)

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  • Average Low 2021–2026

    41.4 °F

  • Average 2021–2026

    50.9 °F

  • Average High 2021–2026

    62.6 °F
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