Jamestown Weather Forecast

    • 55
    • 81

    Thunderstorms Likely

    • 52
    • 70

    Rain Showers

    • 52
    • 71

    Rain Showers

    • 52
    • 69

    Rain Showers

    • 50
    • 68

    Rain Showers

    • 53
    • 70

    Chance Thunderstorms

    • 55
    • 75

    Chance Thunderstorms

Today 12 Aug Larimer and Boulder Counties Between 6000 and 9000 Feet

Showers likely and chance of Thunderstorms early in the Afternoon, then Thunderstorms likely late in the afternoon. Highs 76 to 86. Chance of rain 70 percent.

Tonight 12 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. Lows 49 to 59. Chance of rain 50 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Jamestown Temperature Statistics

August Temperature

Boulder Municipal Airport (9.9 miles)

  • Lowest 5 August, 2026

    50 °F

  • Average August

    78.3 °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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