St Mary's Weather Forecast

    • 44
    • 63

    Increasing Clouds

    • 46
    • 62

    Partly Sunny

    • 44
    • 62

    Slight Chance Thunderstorms

    • 41
    • 58

    Slight Chance Thunderstorms

    • 42
    • 57

    Chance Thunderstorms

    • 44
    • 60

    Slight Chance Thunderstorms

Today 18 Jun South and Southeast Grand/West Central and Southwest Boulder/Gilpin/Clear Creek/Summit/North and Wes

Mostly sunny. Highs 66 to 76. Northwest Winds 10 to 20 Mph in the afternoon. Gusts up to 30 Mph.

Tonight 18 Jun South and Southeast Grand/West Central and Southwest Boulder/Gilpin/Clear Creek/Summit/North and Wes

Partly cloudy. Lows 38 to 48. Northwest Winds 10 to 15 Mph with Gusts up to 35 Mph in the Evening, becoming light.

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St Mary's Temperature Statistics

June Temperature

Boulder Municipal Airport (26.7 miles)

  • Lowest 14 June, 2026

    48.2 °F

  • Average June

    69.8 °F

  • Highest 6 June, 2026

    95 °F

Climate (2021–2026)

Boulder Municipal Airport (26.7 miles)

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  • Average Low 2021–2026

    41.2 °F

  • Average 2021–2026

    53.6 °F

  • Average High 2021–2026

    66.2 °F
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