Jamestown Weather Forecast

    • 61
    • 80

    Chance Thunderstorms

    • 60
    • 79

    Rain Showers

    • 59
    • 76

    Thunderstorms

    • 61
    • 79

    Chance Thunderstorms

    • 63
    • 83

    Chance Thunderstorms

    • 62
    • 83

    Thunderstorms Likely

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

Partly cloudy in the Morning, then mostly cloudy with a chance of Thunderstorms in the afternoon. Highs 77 to 87. Southeast Winds 10 to 15 Mph in the afternoon. Chance of precipitation 40 percent.

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

Partly cloudy with a 20 percent chance of Showers. Lows 55 to 65.

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Jamestown Temperature Statistics

July Temperature

Boulder Municipal Airport (9.9 miles)

  • Lowest 1 July, 2026

    55.4 °F

  • Average July

    77.7 °F

  • Highest 13 July, 2026

    98.6 °F

Climate (2021–2026)

Boulder Municipal Airport (9.9 miles)

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  • Average Low 2021–2026

    41.2 °F

  • Average 2021–2026

    53.6 °F

  • Average High 2021–2026

    66.3 °F
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