Chessman Reservoir Weather Forecast

    • 28
    • 45

    Mostly Sunny

    • 28
    • 44

    Mostly Sunny

    • 28
    • 43

    Partly Sunny

    • 32
    • 41

    Mostly Cloudy

    • 28
    • 47

    Chance Rain/Snow

    • 21
    • 32

    Chance Snow

Today 3 Dec Upper Blackfoot and MacDonald Pass

Sunny in the morning then becoming partly cloudy. Highs 40 to 45. West Winds 5 to 15 Mph. Gusts up to 30 Mph in the morning.

Tonight 3 Dec Upper Blackfoot and MacDonald Pass

Colder. Partly cloudy. Lows 20 to 30. West Winds up to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Chessman Reservoir Temperature Statistics

December Temperature

Helena Regional Airport (13 miles)

  • Lowest 1 December, 2024

    25 °F

  • Average December

    34.4 °F

  • Highest 1 December, 2024

    43 °F

Climate (2019–Present)

Helena Regional Airport (13 miles)

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  • Average Low 2019–2024

    36.2 °F

  • Average 2019–2024

    47.6 °F

  • Average High 2019–2024

    59.3 °F
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