Jamestown Weather Forecast

    • 66
    • 79

    Slight Chance Thunderstorms

    • 62
    • 81

    Becoming Sunny

    • 58
    • 80

    Mostly Sunny

    • 61
    • 80

    Partly Sunny

    • 66
    • 80

    Chance Rain Showers

    • 68
    • 84

    Chance Thunderstorms

    • 65
    • 83

    Slight Chance Thunderstorms

Today 25 Aug Grant

Mostly sunny. Near steady temperature in the upper 70s. South Winds 5 to 10 Mph.

Tonight 25 Aug Grant

Mostly cloudy this Evening, then partly cloudy with a slight chance of Showers and Thunderstorms after midnight. Lows in the mid 60s. South Winds 5 to 10 Mph. Chance of rain 20 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Jamestown Temperature Statistics

August Temperature

Platteville Municipal Airport (8.7 miles)

  • Lowest 23 August, 2026

    53.1 °F

  • Average August

    72.8 °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

    40.8 °F

  • Average 2021–2026

    49.9 °F

  • Average High 2021–2026

    58.8 °F
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