Union Square Weather Forecast

    • 59
    • 78

    Slight Chance Thunderstorms

    • 61
    • 88

    Chance Thunderstorms

    • 63
    • 90

    Slight Chance Thunderstorms

    • 64
    • 90

    Chance Thunderstorms

    • 60
    • 85

    Chance Thunderstorms

    • 60
    • 85

    Chance Thunderstorms

    • 60
    • 86

    Chance Thunderstorms

Today 30 Jun Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County

Mostly cloudy. Chance of Showers in the Morning, then a slight chance of Thunderstorms in the afternoon. Highs in the mid to upper 70s. Chance of rain 30 percent.

Tonight 30 Jun Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County

Mostly cloudy with a slight chance of Thunderstorms early in the Evening, then partly cloudy overnight. Lows in the mid to upper 50s. Chance of precipitation 10 percent.

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  • Temperature Real-Time

Union Square Temperature Statistics

June Temperature

Broomfield / Jeffco (12.4 miles)

  • Lowest 3 June, 2025

    46.4 °F

  • Average June

    65.7 °F

  • Highest 20 June, 2025

    98.6 °F

Climate (2020–Present)

Broomfield / Jeffco (12.4 miles)

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  • Average Low 2020–2025

    41.2 °F

  • Average 2020–2025

    50.6 °F

  • Average High 2020–2025

    64.8 °F
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