Jamestown Weather Forecast

    • 61
    • 85

    Slight Chance Thunderstorms

    • 59
    • 79

    Rain Showers Likely

    • 61
    • 80

    Rain Showers Likely

    • 57
    • 78

    Rain Showers Likely

    • 55
    • 77

    Rain Showers Likely

    • 56
    • 76

    Chance Thunderstorms

Today 21 Aug Larimer and Boulder Counties Between 6000 and 9000 Feet

Partly cloudy. Slight chance of Thunderstorms in the afternoon. Some Thunderstorms may produce gusty Winds in the afternoon. Highs 82 to 92. Chance of precipitation 20 percent.

Tonight 21 Aug Larimer and Boulder Counties Between 6000 and 9000 Feet

Mostly cloudy in the Evening, then becoming partly cloudy. Lows 53 to 63.

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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

    66.3 °F
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