Jamestown Weather Forecast

    • 70
    • 88

    Rain Showers

    • 58
    • 81

    Mostly Sunny

    • 57
    • 77

    Mostly Sunny

    • 60
    • 79

    Partly Sunny

    • 62
    • 81

    Mostly Sunny

    • 66
    • 84

    Mostly Sunny

Today 20 Jul Grant

Becoming partly sunny this afternoon. Showers and isolated Thunderstorms late this morning. Areas of smoke late this morning. Highs in the upper 80s. Southwest Winds 10 to 15 Mph. Chance of rain 100 percent. Heat index Values in the mid 90s this afternoon.

Tonight 20 Jul Grant

Partly cloudy. Numerous Showers and scattered Thunderstorms in the evening. Humid with Lows in the upper 60s. Southwest Winds 10 to 15 Mph, becoming west 5 to 10 Mph after midnight. Chance of rain 70 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

    78.4 °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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