Ruby River Reservoir Weather Forecast

    • 33
    • 59

    Rain

    • 30
    • 54

    Chance Rain/Snow

    • 38
    • 64

    Partly Sunny

    • 44
    • 72

    Partly Sunny

    • 45
    • 75

    Slight Chance Thunderstorms

    • 45
    • 76

    Slight Chance Thunderstorms

    • 41
    • 70

    Chance Rain

Today 20 May Beaverhead and Western Madison below 6000ft

Mostly cloudy. A 20 percent chance of Thunderstorms late in the afternoon. Highs 56 to 62. West Winds 5 to 15 Mph.

Tonight 20 May Beaverhead and Western Madison below 6000ft

Rain Showers likely and slight chance of Thunderstorms early in the Evening, then rain late in the evening. Rain and snow likely after midnight. Snow accumulation up to 1 inch. Lows in the mid 30s. North Winds 5 to 15 Mph with Gusts to around 35 Mph. Chance of precipitation near 100 percent.

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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

    52.5 °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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