Rock Lake Weather Forecast

    • 37
    • 52

    Slight Chance Rain

    • 41
    • 59

    Chance Rain Showers

    • 41
    • 59

    Rain Likely

    • 40
    • 52

    Rain Showers Likely

    • 40
    • 56

    Slight Chance Rain

    • 43
    • 64

    Mostly Sunny

    • 45
    • 65

    Partly Sunny

Today 4 Sep Kootenai/Cabinet Region

Mostly cloudy. A 50 percent chance of Areas of rain in the morning. Patchy fog in the morning. Highs in the mid 60s to lower 70s.

Tonight 4 Sep Kootenai/Cabinet Region

Partly cloudy until early morning then becoming mostly cloudy. Patchy fog late in the night. Lows in the upper 30s to mid 40s.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Rock Lake Temperature Statistics

September Temperature

Mullan Pass, Mullan Pass Vor (41.6 miles)

  • Lowest 2 September, 2026

    42.1 °F

  • Average September

    53.3 °F

  • Highest 1 September, 2026

    71.1 °F

Climate (2021–2026)

Mullan Pass, Mullan Pass Vor (41.6 miles)

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  • Average Low 2021–2026

    33.8 °F

  • Average 2021–2026

    39.8 °F

  • Average High 2021–2026

    46.1 °F
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