Stewart Lake Weather Forecast

    • 18
    • 36

    Blowing Snow

    • 28
    • 33

    Snow

    • 17
    • 31

    Snow

    • 18
    • 21

    Chance Snow

    • 27
    • 31

    Chance Snow

    • 21
    • 29

    Chance Snow

    • 24
    • 30

    Mostly Cloudy

Today 17 Dec Butte/Blackfoot Region

Very windy with southwest Winds 25 to 35 Mph increasing to west 35 to 45 Mph in the afternoon. Rain and snow likely early in the Morning, then Areas of snow in the late morning and afternoon. Patchy blowing snow in the late morning and afternoon. Chance of precipitation near 100 percent. Snow level 4000 feet. Snow Accumulations of 1 to 2 Inches. Highs in the upper 30s to mid 40s. Temperatures steady or falling into the upper 20s in the afternoon. Gusts up to 65 Mph.

Tonight 17 Dec Butte/Blackfoot Region

Very windy with west Winds 30 to 40 Mph in the evening. Mostly cloudy. Lows 18 to 25. 15 to 25 Mph with Gusts to around 45 Mph after midnight.

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Stewart Lake Temperature Statistics

December Temperature

Butte, Bert Mooney Airport (44.7 miles)

  • Lowest 1 December, 2025

    3 °F
  • Average December

    35.6 °F
  • Highest 14 December, 2025

    57.9 °F

Climate (2020–Present)

Butte, Bert Mooney Airport (44.7 miles)

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  • Average Low 2020–2025

    28.1 °F
  • Average 2020–2025

    41.9 °F
  • Average High 2020–2025

    55.2 °F
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