Mount Vernon Weather Forecast

    • 36
    • 65

    Partly Sunny

    • 36
    • 59

    Partly Sunny

    • 38
    • 59

    Partly Sunny

    • 34
    • 57

    Partly Sunny

    • 26
    • 51

    Mostly Cloudy

    • 24
    • 41

    Mostly Cloudy

Today 22 Dec Jefferson and West Douglas Counties Above 6000 Feet/Gilpin/Clear Creek/Northeast Park Counties Below

Mostly sunny. Highs 59 to 69. West Winds 15 to 25 Mph with Gusts up to 35 Mph.

Tonight 22 Dec Jefferson and West Douglas Counties Above 6000 Feet/Gilpin/Clear Creek/Northeast Park Counties Below

Partly cloudy. Lows 32 to 40. Southwest Winds 10 to 15 Mph.

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Mount Vernon Temperature Statistics

December Temperature

Broomfield / Jeffco (15.5 miles)

  • Lowest 1 December, 2025

    14 °F

  • Average December

    43.1 °F

  • Highest 19 December, 2025

    73.4 °F

Climate (2020–Present)

Broomfield / Jeffco (15.5 miles)

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  • Average Low 2020–2025

    41.5 °F

  • Average 2020–2025

    50.8 °F

  • Average High 2020–2025

    65 °F
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