Jamestown Weather Forecast

    • 54
    • 71

    Rain Showers Likely

    • 54
    • 74

    Partly Sunny

    • 54
    • 75

    Mostly Sunny

    • 56
    • 77

    Mostly Sunny

    • 58
    • 78

    Chance Thunderstorms

    • 58
    • 77

    Chance Thunderstorms

Today 31 Aug Larimer and Boulder Counties Between 6000 and 9000 Feet

Mostly cloudy. Slight chance of Thunderstorms early in the afternoon. Chance of Thunderstorms late in the afternoon. Highs 69 to 79. Chance of precipitation 30 percent.

Tonight 31 Aug Larimer and Boulder Counties Between 6000 and 9000 Feet

Showers likely and slight chance of Thunderstorms in the Evening, then a chance of Showers after midnight. Lows 47 to 57. Chance of rain 70 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Jamestown Temperature Statistics

August Temperature

Boulder Municipal Airport (9.9 miles)

  • Lowest 5 August, 2026

    50 °F

  • Average August

    76.3 °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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