Jamestown Weather Forecast

    • 51
    • 71

    Decreasing Clouds

    • 51
    • 73

    Mostly Sunny

    • 53
    • 73

    Mostly Sunny

    • 51
    • 71

    Partly Sunny

    • 47
    • 65

    Mostly Cloudy

    • 44
    • 61

    Chance Rain Showers

Today 7 Oct Larimer and Boulder Counties Between 6000 and 9000 Feet

Mostly sunny. Slight chance of Showers in the afternoon. Highs 69 to 79. Chance of rain 20 percent.

Tonight 7 Oct Larimer and Boulder Counties Between 6000 and 9000 Feet

Partly cloudy. Lows 43 to 53.

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Jamestown Temperature Statistics

October Temperature

Boulder Municipal Airport (9.9 miles)

  • Lowest 2 October, 2026

    46.4 °F

  • Average October

    64.3 °F

  • Highest 3 October, 2026

    86 °F

Climate (2021–2026)

Boulder Municipal Airport (9.9 miles)

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  • Average Low 2021–2026

    41.4 °F

  • Average 2021–2026

    53.7 °F

  • Average High 2021–2026

    66.4 °F
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