Jamestown Weather Forecast

    • 60
    • 81

    Mostly Sunny

    • 61
    • 84

    Slight Chance Thunderstorms

    • 60
    • 79

    Rain Showers Likely

    • 60
    • 79

    Thunderstorms Likely

    • 57
    • 77

    Rain Showers

    • 56
    • 77

    Rain Showers Likely

Today 20 Aug Larimer and Boulder Counties Between 6000 and 9000 Feet

Mostly sunny. Highs 79 to 89.

Tonight 20 Aug Larimer and Boulder Counties Between 6000 and 9000 Feet

Mostly clear. Lows 52 to 62.

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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

    76.2 °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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