Jamestown Weather Forecast

    • 48
    • 67

    Chance Thunderstorms

    • 47
    • 63

    Rain Showers

    • 48
    • 65

    Rain Showers Likely

    • 48
    • 69

    Chance Thunderstorms

    • 46
    • 65

    Rain Showers Likely

    • 48
    • 66

    Rain Showers Likely

    • 48
    • 65

    Rain Showers Likely

Today 26 May Larimer and Boulder Counties Between 6000 and 9000 Feet

Mostly cloudy with a 30 percent chance of Thunderstorms. Highs 64 to 74. Southeast Winds 10 to 20 Mph with Gusts up to 35 Mph.

Tonight 26 May Larimer and Boulder Counties Between 6000 and 9000 Feet

Mostly cloudy. Chance of Showers and slight chance of Thunderstorms in the Evening, then a slight chance of Showers after midnight. Lows 42 to 52. South Winds 10 to 15 Mph with Gusts up to 30 Mph in the Evening, becoming light. Chance of rain 40 percent.

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Jamestown Temperature Statistics

May Temperature

Boulder Municipal Airport (9.9 miles)

  • Lowest 1 May, 2026

    32 °F

  • Average May

    57.3 °F

  • Highest 11 May, 2026

    87.8 °F

Climate (2021–Present)

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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