Ruby River Reservoir Weather Forecast

    • 30
    • 53

    Rain/Snow Likely

    • 37
    • 63

    Partly Sunny

    • 43
    • 72

    Mostly Sunny

    • 45
    • 76

    Partly Sunny

    • 46
    • 76

    Breezy

    • 42
    • 69

    Chance Rain

Today 21 May Beaverhead and Western Madison below 6000ft

Mostly cloudy with a 50 percent chance of rain and snow in the Morning, then mostly sunny in the afternoon. Highs 52 to 58. North Winds 10 to 20 Mph. Gusts up to 40 Mph decreasing to 30 Mph in the afternoon.

Tonight 21 May Beaverhead and Western Madison below 6000ft

Partly cloudy. Lows in the lower 30s. Northeast Winds up to 10 Mph with Gusts to around 25 Mph shifting to the south after midnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Ruby River Reservoir Temperature Statistics

May Temperature

Dillon, Dillon Airport (20.5 miles)

  • Lowest 6 May, 2026

    23.6 °F

  • Average May

    52.1 °F

  • Highest 12 May, 2026

    85.6 °F

Climate (2021–Present)

Dillon, Dillon Airport (20.5 miles)

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  • Average Low 2021–2026

    31.5 °F

  • Average 2021–2026

    43.9 °F

  • Average High 2021–2026

    57 °F
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