Jamestown Weather Forecast

    • 73
    • 90

    Slight Chance Thunderstorms

    • 66
    • 88

    Mostly Sunny

    • 68
    • 85

    Partly Sunny

    • 70
    • 89

    Chance Thunderstorms

    • 61
    • 82

    Mostly Sunny

    • 59
    • 79

    Mostly Sunny

Today 17 Jul Grant

Mostly sunny. Isolated Showers this Morning, then a slight chance of Showers and Thunderstorms this afternoon. Hot with Highs around 90. Southwest Winds 5 to 10 Mph. Chance of rain 20 percent.

Tonight 17 Jul Grant

Partly cloudy. A slight chance of Showers and Thunderstorms in the evening. Humid with Lows in the lower 70s. Southwest Winds 5 to 10 Mph. Chance of rain 20 percent. Heat index Values in the mid 90s early in the evening.

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Jamestown Temperature Statistics

July Temperature

Platteville Municipal Airport (8.7 miles)

  • Lowest 7 July, 2026

    61.2 °F

  • Average July

    77.8 °F

  • Highest 15 July, 2026

    90.9 °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

    58.8 °F
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