Heart Lake Weather Forecast

    • 41
    • 62

    Becoming Sunny

    • 43
    • 68

    Partly Sunny

    • 27
    • 56

    Snow

    • 20
    • 34

    Snow Likely

    • 18
    • 32

    Snow Likely

    • 18
    • 35

    Chance Snow

Today 20 Apr Southern Rocky Mountain Front

Warmer, sunny. Highs 56 to 66. Southwest Winds up to 15 Mph. Gusts up to 30 Mph in the afternoon.

Tonight 20 Apr Southern Rocky Mountain Front

Partly cloudy. Highs 56 to 66. Lows 35 to 44. Southwest Winds up to 15 Mph with Gusts to around 30 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Heart Lake Temperature Statistics

April Temperature

Helena Regional Airport (47.8 miles)

  • Lowest 8 April, 2026

    27.6 °F

  • Average April

    46.2 °F

  • Highest 7 April, 2026

    69.7 °F

Climate (2021–Present)

Helena Regional Airport (47.8 miles)

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  • Average Low 2021–2026

    36.5 °F

  • Average 2021–2026

    48.1 °F

  • Average High 2021–2026

    60 °F
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