Jamestown Weather Forecast

    • 56
    • 79

    Chance Thunderstorms

    • 56
    • 76

    Chance Thunderstorms

    • 59
    • 76

    Slight Chance Thunderstorms

    • 60
    • 80

    Chance Thunderstorms

    • 60
    • 79

    Rain Showers Likely

    • 58
    • 79

    Rain Showers

Today 18 Aug Larimer and Boulder Counties Between 6000 and 9000 Feet

Partly cloudy with a slight chance of Showers in the Morning, then mostly cloudy with a chance of Thunderstorms in the afternoon. Highs 74 to 84. Northwest Winds 10 to 15 Mph with Gusts up to 20 Mph in the afternoon. Chance of rain 40 percent.

Tonight 18 Aug Larimer and Boulder Counties Between 6000 and 9000 Feet

Mostly cloudy with a chance of Thunderstorms in the Evening, then partly cloudy after midnight. Lows 48 to 58. Chance of precipitation 40 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

    76.6 °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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