Union Square Weather Forecast

    • 49
    • 80

    Sunny

    • 50
    • 75

    Sunny

    • 52
    • 80

    Mostly Sunny

    • 52
    • 80

    Mostly Sunny

    • 54
    • 81

    Partly Sunny

    • 54
    • 81

    Slight Chance Thunderstorms

    • 52
    • 77

    Chance Rain Showers

Today 24 Sep Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County

Sunny. Highs in the upper 70s.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Union Square Temperature Statistics

September Temperature

Broomfield / Jeffco (12.4 miles)

  • Lowest 11 September, 2022

    44.6 °F

  • Average September

    67.3 °F

  • Highest 5 September, 2022

    95 °F

Climate (2010–Present)

Broomfield / Jeffco (12.4 miles)

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  • Average Low 2010–Present

    41.6 °F

  • Average 2010–Present

    51.1 °F

  • Average High 2010–Present

    65.5 °F
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