Bair Reservoir Weather Forecast

    • 34
    • 44

    Breezy

    • 20
    • 43

    Rain Likely

    • 28
    • 36

    Rain/Snow Likely

    • 21
    • 41

    Snow Likely

    • 18
    • 31

    Partly Sunny

    • 23
    • 36

    Chance Rain/Snow

    • 25
    • 41

    Slight Chance Rain/Snow

Today 16 Dec Meagher County Valleys

Windy. Mostly sunny. Highs in the upper 40s. West Winds 15 to 30 Mph with Gusts to around 55 Mph.

Tonight 16 Dec Meagher County Valleys

Windy. Mostly cloudy then becoming partly cloudy late in the evening then becoming mostly cloudy. A 20 percent chance of rain and snow late in the night. Lows in the lower 30s. Southwest Winds 15 to 30 Mph. Gusts up to 55 Mph increasing to 70 Mph after midnight.

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Bair Reservoir Temperature Statistics

December Temperature

Lewistown, Lewistown Municipal Airport (60.9 miles)

  • Lowest 12 December, 2025

    1 °F

  • Average December

    28.3 °F

  • Highest 11 December, 2025

    48.9 °F

Climate (2020–Present)

Lewistown, Lewistown Municipal Airport (60.9 miles)

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  • Average Low 2020–2025

    32.4 °F

  • Average 2020–2025

    44.6 °F

  • Average High 2020–2025

    56.5 °F
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