Jamestown Weather Forecast

    • 51
    • 67

    Slight Chance Thunderstorms

    • 52
    • 75

    Mostly Sunny

    • 57
    • 83

    Mostly Sunny

    • 60
    • 85

    Mostly Sunny

    • 63
    • 87

    Mostly Sunny

    • 64
    • 86

    Partly Sunny

Today 4 Aug Larimer and Boulder Counties Between 6000 and 9000 Feet

Partly cloudy. Slight chance of Showers early in the morning. Slight chance of Thunderstorms late in the afternoon. Patchy smoke through the day. Highs 66 to 76. Southeast Winds 10 to 15 Mph with Gusts up to 20 Mph in the afternoon. Chance of rain 10 percent.

Tonight 4 Aug Larimer and Boulder Counties Between 6000 and 9000 Feet

Partly cloudy. Patchy smoke. Lows 43 to 53. Southeast Winds 10 to 15 Mph with Gusts up to 25 Mph in the Evening, becoming light.

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Jamestown Temperature Statistics

August Temperature

Boulder Municipal Airport (9.9 miles)

  • Lowest 2 August, 2026

    59 °F

  • Average August

    81.4 °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

    66.3 °F
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