Heart Lake Weather Forecast

    • 31
    • 55

    Rain Showers

    • 35
    • 59

    Increasing Clouds

    • 32
    • 56

    Mostly Sunny

    • 37
    • 63

    Mostly Sunny

    • 36
    • 66

    Mostly Sunny

    • 40
    • 66

    Mostly Sunny

    • 37
    • 67

    Mostly Sunny

Today 7 May Yellowstone National Park

Partly cloudy with scattered rain Showers with isolated Thunderstorms. Highs in the mid 50s. West Winds 10 to 15 Mph with Gusts up to 30 Mph. Chance of rain 30 percent.

Tonight 7 May Yellowstone National Park

Partly cloudy. Scattered rain Showers with isolated Thunderstorms in the evening. Patchy fog after midnight. Lows around 30. Northwest Winds around 10 Mph with Gusts up to 30 Mph in the evening. Chance of rain 30 percent.

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Heart Lake Temperature Statistics

May Temperature

Yellowstone Lake (19.3 miles)

  • Lowest 1 May, 2026

    18.6 °F

  • Average May

    38.5 °F

  • Highest 3 May, 2026

    58.6 °F

Climate (2021–Present)

Yellowstone Lake (19.3 miles)

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  • Average Low 2021–2026

    23.1 °F

  • Average 2021–2026

    35.9 °F

  • Average High 2021–2026

    48.7 °F
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