Heart Lake Weather Forecast

    • 52
    • 58

    Mostly Sunny

    • 43
    • 61

    Mostly Sunny

    • 45
    • 61

    Mostly Sunny

    • 35
    • 56

    Chance Rain/Snow

    • 26
    • 39

    Snow Likely

    • 24
    • 28

    Slight Chance Snow

    • 26
    • 33

    Partly Sunny

Today 6 Oct Lower Clark Fork Region

Mostly sunny. A 20 percent chance of snow in the morning. Highs in the 50s.

Tonight 6 Oct Lower Clark Fork Region

Partly cloudy. Lows in the upper 30s to mid 40s.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Heart Lake Temperature Statistics

October Temperature

Missoula, Missoula International Airport (41 miles)

  • Lowest 4 October, 2026

    37.9 °F

  • Average October

    56.2 °F

  • Highest 2 October, 2026

    78.7 °F

Climate (2021–2026)

Missoula, Missoula International Airport (41 miles)

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  • Average Low 2021–2026

    36 °F

  • Average 2021–2026

    47.6 °F

  • Average High 2021–2026

    59.7 °F
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