Bair Reservoir Weather Forecast

    • 39
    • 64

    Increasing Clouds

    • 41
    • 70

    Mostly Sunny

    • 45
    • 74

    Partly Sunny

    • 45
    • 72

    Mostly Sunny

    • 47
    • 75

    Mostly Sunny

    • 42
    • 75

    Partly Sunny

    • 36
    • 60

    Partly Sunny

Today 20 Sep Meagher County Valleys

Partly sunny. Highs in the lower 60s.

Tonight 20 Sep Meagher County Valleys

Mostly clear. Lows around 40. East Winds up to 5 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Bair Reservoir Temperature Statistics

September Temperature

Lewistown, Lewistown Municipal Airport (60.9 miles)

  • Lowest 9 September, 2026

    39.7 °F

  • Average September

    61 °F

  • Highest 2 September, 2026

    87.7 °F

Climate (2021–2026)

Lewistown, Lewistown Municipal Airport (60.9 miles)

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  • Average Low 2021–2026

    32.5 °F

  • Average 2021–2026

    44.9 °F

  • Average High 2021–2026

    57 °F
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