Walnut Grove Weather Forecast

    • 64
    • 91

    Slight Chance Thunderstorms

    • 65
    • 94

    Mostly Sunny

    • 65
    • 96

    Mostly Sunny

    • 61
    • 86

    Thunderstorms Likely

    • 60
    • 82

    Chance Thunderstorms

    • 60
    • 79

    Thunderstorms Likely

Today 19 Aug Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County

Mostly sunny. Slight chance of Thunderstorms in the afternoon. Highs near 90. Chance of precipitation 20 percent.

Tonight 19 Aug Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County

Mostly clear. Lows near 60.

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Walnut Grove Temperature Statistics

August Temperature

Broomfield / Jeffco (1.2 miles)

  • Lowest 2 August, 2025

    50 °F

  • Average August

    72.4 °F

  • Highest 4 August, 2025

    96.8 °F

Climate (2020–Present)

Broomfield / Jeffco (1.2 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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