St Mary's Weather Forecast

    • 22
    • 35

    Windy

    • 22
    • 29

    Windy

    • 14
    • 31

    Blizzard

    • 24
    • 29

    Slight Chance Snow

    • 28
    • 34

    Chance Snow

    • 22
    • 30

    Chance Snow

Today 15 Dec South and Southeast Grand/West Central and Southwest Boulder/Gilpin/Clear Creek/Summit/North and Wes

Mostly sunny. Highs 38 to 48. West Winds 10 to 15 Mph in the Morning, becoming light.

Tonight 15 Dec South and Southeast Grand/West Central and Southwest Boulder/Gilpin/Clear Creek/Summit/North and Wes

Mostly clear. Lows 18 to 28. West Winds 10 to 15 Mph.

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  • Temperature Real-Time

St Mary's Temperature Statistics

December Temperature

Boulder Municipal Airport (26.7 miles)

  • Lowest 4 December, 2025

    10.4 °F

  • Average December

    40.8 °F

  • Highest 11 December, 2025

    64.4 °F

Climate (2020–Present)

Boulder Municipal Airport (26.7 miles)

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  • Average Low 2020–2025

    40.6 °F

  • Average 2020–2025

    52.7 °F

  • Average High 2020–2025

    65.2 °F
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