Jamestown Weather Forecast

    • 51
    • 71

    Thunderstorms Likely

    • 51
    • 70

    Thunderstorms Likely

    • 52
    • 70

    Thunderstorms Likely

    • 55
    • 73

    Slight Chance Thunderstorms

    • 56
    • 79

    Slight Chance Thunderstorms

    • 53
    • 73

    Thunderstorms Likely

    • 55
    • 75

    Chance Thunderstorms

Today 14 Aug Larimer and Boulder Counties Between 6000 and 9000 Feet

Chance of Thunderstorms early in the Afternoon, then Thunderstorms likely late in the afternoon. Some Thunderstorms may produce heavy rainfall. Highs 69 to 79. Chance of precipitation 70 percent.

Tonight 14 Aug Larimer and Boulder Counties Between 6000 and 9000 Feet

Mostly cloudy. Chance of Thunderstorms early in the Evening, then a chance of Showers and slight chance of Thunderstorms during the late evening hours. Some Thunderstorms may produce heavy rainfall in the evening. Lows 47 to 57. Chance of rain 50 percent.

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Jamestown Temperature Statistics

August Temperature

Boulder Municipal Airport (9.9 miles)

  • Lowest 5 August, 2026

    50 °F

  • Average August

    78.5 °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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