Jamestown Weather Forecast

    • 63
    • 82

    Partly Sunny

    • 69
    • 79

    Chance Rain Showers

    • 71
    • 85

    Chance Thunderstorms

    • 72
    • 88

    Chance Thunderstorms

    • 71
    • 87

    Chance Thunderstorms

    • 70
    • 87

    Chance Rain Showers

    • 69
    • 86

    Chance Rain Showers

Today 28 Aug Grant

Mostly sunny. Highs in the lower 80s. Light Winds.

Tonight 28 Aug Grant

Partly cloudy this Evening, then becoming mostly cloudy. Lows in the lower 60s. South Winds around 5 Mph.

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Jamestown Temperature Statistics

August Temperature

Platteville Municipal Airport (8.7 miles)

  • Lowest 23 August, 2026

    53.1 °F

  • Average August

    72.3 °F

  • Highest 10 August, 2026

    84.2 °F

Climate (2021–2026)

Platteville Municipal Airport (8.7 miles)

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  • Average Low 2021–2026

    40.7 °F

  • Average 2021–2026

    49.9 °F

  • Average High 2021–2026

    58.7 °F
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