Heart Lake Weather Forecast

    • 37
    • 55

    Partly Sunny

    • 40
    • 60

    Partly Sunny

    • 40
    • 59

    Mostly Cloudy

    • 28
    • 43

    Rain/Snow Likely

    • 25
    • 38

    Chance Snow

    • 26
    • 41

    Chance Snow

Today 20 Oct Southern Rocky Mountain Front

Mostly sunny. Highs 49 to 57. East Winds up to 10 Mph.

Tonight 20 Oct Southern Rocky Mountain Front

Partly cloudy. Lows in the upper 30s. South Winds up to 5 Mph.

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Heart Lake Temperature Statistics

October Temperature

Helena Regional Airport (47.8 miles)

  • Lowest 13 October, 2026

    25.6 °F

  • Average October

    50.7 °F

  • Highest 9 October, 2026

    82.7 °F

Climate (2021–2026)

Helena Regional Airport (47.8 miles)

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  • Average Low 2021–2026

    36.3 °F

  • Average 2021–2026

    47.9 °F

  • Average High 2021–2026

    59.9 °F
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