Madison County Fairgrounds Weather Forecast

    • 47
    • 80

    Chance Thunderstorms

    • 49
    • 84

    Mostly Sunny

    • 52
    • 88

    Partly Sunny

    • 54
    • 88

    Chance Rain Showers

    • 49
    • 84

    Chance Thunderstorms

    • 47
    • 82

    Mostly Sunny

    • 49
    • 82

    Partly Sunny

Today 18 Aug Beaverhead and Western Madison below 6000ft

Mostly sunny. Slight chance of Thunderstorms early in the Afternoon, then chance of rain Showers and slight chance of Thunderstorms late in the afternoon. Highs 74 to 80. West Winds 5 to 15 Mph. Chance of precipitation 50 percent.

Tonight 18 Aug Beaverhead and Western Madison below 6000ft

Mostly cloudy with a 20 percent chance of rain Showers in the Evening, then mostly clear after midnight. Lows in the upper 40s. North Winds 5 to 10 Mph with Gusts to around 25 Mph shifting to the southwest after midnight.

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Madison County Fairgrounds Temperature Statistics

August Temperature

Dillon, Dillon Airport (21.7 miles)

  • Lowest 4 August, 2026

    39.7 °F

  • Average August

    66.3 °F

  • Highest 1 August, 2026

    93.7 °F

Climate (2021–2026)

Dillon, Dillon Airport (21.7 miles)

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  • Average Low 2021–2026

    31.5 °F

  • Average 2021–2026

    43.9 °F

  • Average High 2021–2026

    56.9 °F
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