Jefferson City Weather Forecast

    • 30
    • 40

    Rain/Snow Likely

    • 26
    • 42

    Rain/Snow Likely

    • 30
    • 45

    Mostly Cloudy

    • 27
    • 49

    Chance Rain/Snow

    • 27
    • 44

    Chance Snow

    • 23
    • 42

    Slight Chance Snow

Today 21 Dec Elkhorn and Boulder Mountains

Not as cold. Mostly cloudy. Chance of snow in the Morning, then chance of snow and rain in the afternoon. Highs 31 to 37. Southwest Winds 5 to 10 Mph with Gusts to around 25 Mph. Chance of precipitation 50 percent.

Tonight 21 Dec Elkhorn and Boulder Mountains

Snow likely and chance of rain in the Evening, then snow and rain likely after midnight. Snow accumulation up to 1 inch. Snow level 6400 feet. Near steady temperature in the lower 30s. Southwest Winds 5 to 10 Mph with Gusts to around 30 Mph. Chance of precipitation 70 percent.

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Jefferson City Temperature Statistics

December Temperature

Helena Regional Airport (14.9 miles)

  • Lowest 1 December, 2025

    3 °F

  • Average December

    36.8 °F

  • Highest 10 December, 2025

    61 °F

Climate (2020–Present)

Helena Regional Airport (14.9 miles)

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  • Average Low 2020–2025

    36.3 °F

  • Average 2020–2025

    47.7 °F

  • Average High 2020–2025

    59.6 °F
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