Madison County Fairgrounds Weather Forecast

    • 48
    • 84

    Increasing Clouds

    • 40
    • 85

    Chance Rain Showers

    • 37
    • 68

    Breezy

    • 38
    • 72

    Partly Sunny

    • 31
    • 61

    Mostly Cloudy

    • 31
    • 57

    Slight Chance Rain/Snow

Today 12 May Beaverhead and Western Madison below 6000ft

Sunny. Highs 77 to 85. Southeast Winds up to 5 Mph shifting to the west in the afternoon.

Tonight 12 May Beaverhead and Western Madison below 6000ft

Partly cloudy. Lows around 50. Northeast Winds up to 10 Mph shifting to the southeast after midnight.

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Madison County Fairgrounds Temperature Statistics

May Temperature

Dillon, Dillon Airport (21.7 miles)

  • Lowest 6 May, 2026

    23.6 °F

  • Average May

    52.4 °F

  • Highest 10 May, 2026

    81 °F

Climate (2021–Present)

Dillon, Dillon Airport (21.7 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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