Ruby River Reservoir Weather Forecast

    • 24
    • 48

    Mostly Sunny

    • 33
    • 58

    Chance Rain Showers

    • 34
    • 59

    Rain Showers

    • 33
    • 58

    Partly Sunny

    • 37
    • 64

    Partly Sunny

    • 42
    • 72

    Partly Sunny

    • 45
    • 76

    Partly Sunny

Today 18 May Beaverhead and Western Madison below 6000ft

Mostly sunny. Highs 46 to 52. Northeast Winds 10 to 15 Mph with Gusts to around 40 Mph.

Tonight 18 May Beaverhead and Western Madison below 6000ft

Partly cloudy. Lows in the mid 20s. North Winds up to 10 Mph with Gusts to around 25 Mph shifting to the southwest 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

    54.2 °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

    31.6 °F

  • Average 2021–2026

    43.9 °F

  • Average High 2021–2026

    57 °F
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