Sienna Weather Forecast

    • 29
    • 49

    Becoming Sunny

    • 42
    • 62

    Mostly Sunny

    • 39
    • 78

    Mostly Sunny

    • 42
    • 65

    Partly Sunny

    • 42
    • 73

    Partly Sunny

    • 42
    • 69

    Mostly Sunny

Today 31 Oct North Douglas County Below 6000 Feet/Denver/West Adams and Arapahoe Counties/East Broomfield County

Mostly cloudy in the Morning, then becoming partly cloudy. Highs in the upper 40s.

Tonight 31 Oct North Douglas County Below 6000 Feet/Denver/West Adams and Arapahoe Counties/East Broomfield County

Mostly clear. Lows in the mid to upper 20s.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Sienna Temperature Statistics

October Temperature

Buckley Air Force Base Airport (0.6 miles)

  • Lowest 28 October, 2025

    26.8 °F

  • Average October

    56.1 °F

  • Highest 3 October, 2025

    85.8 °F

Climate (2020–Present)

Buckley Air Force Base Airport (0.6 miles)

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  • Average Low 2020–2025

    39.4 °F

  • Average 2020–2025

    51.4 °F

  • Average High 2020–2025

    64.8 °F
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