Jamestown Weather Forecast

    • 54
    • 82

    Mostly Sunny

    • 50
    • 77

    Chance Thunderstorms

    • 52
    • 74

    Slight Chance Thunderstorms

    • 52
    • 68

    Chance Thunderstorms

    • 53
    • 74

    Slight Chance Thunderstorms

    • 54
    • 75

    Chance Thunderstorms

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

Partly cloudy. Slight chance of Thunderstorms in the afternoon. Highs 77 to 87. Southwest Winds 10 to 15 Mph with Gusts up to 25 Mph in the afternoon. Chance of precipitation 10 percent.

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

Mostly clear. Lows 47 to 57. West Winds 10 to 15 Mph with Gusts up to 30 Mph in the Evening, becoming light.

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Jamestown Temperature Statistics

June Temperature

Boulder Municipal Airport (9.9 miles)

  • Lowest 14 June, 2026

    48.2 °F

  • Average June

    70.9 °F

  • Highest 6 June, 2026

    95 °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

    66.2 °F
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