Fortress Mountain Weather Forecast

    • 37
    • 60

    Slight Chance Thunderstorms

    • 36
    • 52

    Rain/Snow Likely

    • 39
    • 53

    Breezy

    • 42
    • 60

    Breezy

    • 40
    • 57

    Breezy

    • 30
    • 55

    Chance Rain/Snow

Today 16 Jun Absaroka Mountains

Partly cloudy this Morning, then mostly cloudy with scattered rain Showers and Thunderstorms this afternoon. Some Thunderstorms may be severe. Breezy with Highs in the upper 60s. South Winds 10 to 15 Mph, becoming west 15 to 20 Mph with Gusts up to 30 Mph this afternoon. Chance of rain 30 percent.

Tonight 16 Jun Absaroka Mountains

Partly cloudy with scattered rain Showers. Scattered Thunderstorms, mainly in the evening. Some Thunderstorms may be severe with gusty Winds and small hail in the evening. Some Thunderstorms may produce gusty Winds and small hail after midnight. Breezy with Lows in the lower 40s. West Winds 15 to 20 Mph with Gusts up to 30 Mph, becoming south around 10 Mph after midnight. Chance of rain 30 percent.

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Fortress Mountain Temperature Statistics

June Temperature

Yellowstone Lake (33.6 miles)

  • Lowest 5 June, 2025

    26.1 °F

  • Average June

    49.9 °F

  • Highest 1 June, 2025

    75.7 °F

Climate (2020–Present)

Yellowstone Lake (33.6 miles)

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  • Average Low 2020–2025

    22.3 °F

  • Average 2020–2025

    35.1 °F

  • Average High 2020–2025

    47.8 °F
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