McAllister Weather Forecast

    • 47
    • 80

    Chance Thunderstorms

    • 51
    • 84

    Mostly Sunny

    • 55
    • 89

    Mostly Sunny

    • 56
    • 88

    Mostly Cloudy

    • 52
    • 85

    Chance Thunderstorms

    • 51
    • 82

    Chance Rain Showers

Today 18 Aug Madison River Valley

Mostly sunny. A 50 percent chance of Thunderstorms in the afternoon. Highs in the upper 70s. South Winds up to 5 Mph shifting to the west 5 to 15 Mph in the afternoon.

Tonight 18 Aug Madison River Valley

Mostly cloudy with a 50 percent chance of rain Showers in the Evening, then mostly clear after midnight. Lows 46 to 52. West 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

McAllister Temperature Statistics

August Temperature

Ennis - Big Sky Airport (12.4 miles)

  • Lowest 4 August, 2026

    37.4 °F

  • Average August

    65.7 °F

  • Highest 1 August, 2026

    96.8 °F

Climate (2021–2026)

Ennis - Big Sky Airport (12.4 miles)

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  • Average Low 2021–2026

    32 °F

  • Average 2021–2026

    44.4 °F

  • Average High 2021–2026

    56.3 °F
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