Jamestown Weather Forecast

    • 61
    • 82

    Slight Chance Thunderstorms

    • 59
    • 81

    Chance Thunderstorms

    • 56
    • 77

    Chance Thunderstorms

    • 54
    • 73

    Rain Showers Likely

    • 54
    • 75

    Slight Chance Thunderstorms

    • 56
    • 76

    Slight Chance Thunderstorms

Today 28 Aug Larimer and Boulder Counties Between 6000 and 9000 Feet

Partly cloudy in the Morning, then mostly cloudy with a slight chance of Thunderstorms in the afternoon. Highs 78 to 88. West Winds 10 to 15 Mph with Gusts up to 20 Mph. Chance of precipitation 20 percent.

Tonight 28 Aug Larimer and Boulder Counties Between 6000 and 9000 Feet

Partly cloudy. Lows 51 to 61.

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Jamestown Temperature Statistics

August Temperature

Boulder Municipal Airport (9.9 miles)

  • Lowest 5 August, 2026

    50 °F

  • Average August

    76.4 °F

  • Highest 2 August, 2026

    104 °F

Climate (2021–2026)

Boulder Municipal Airport (9.9 miles)

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  • Average Low 2021–2026

    41.3 °F

  • Average 2021–2026

    53.7 °F

  • Average High 2021–2026

    66.4 °F
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