Jamestown Weather Forecast

    • 63
    • 85

    Partly Sunny

    • 62
    • 85

    Partly Sunny

    • 61
    • 84

    Slight Chance Thunderstorms

    • 61
    • 81

    Chance Thunderstorms

    • 58
    • 75

    Chance Rain Showers

    • 57
    • 72

    Chance Rain Showers

Today 15 Sep Grant

Mostly sunny. Humid with Highs in the mid 80s. Southeast Winds 5 to 10 Mph.

Tonight 15 Sep Grant

Partly cloudy. Lows in the mid 60s. Light Winds.

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Jamestown Temperature Statistics

September Temperature

Platteville Municipal Airport (8.7 miles)

  • Lowest 7 September, 2025

    41 °F
  • Average September

    60.9 °F
  • Highest 12 September, 2025

    83.1 °F

Climate (2020–Present)

Platteville Municipal Airport (8.7 miles)

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  • Average Low 2020–2025

    40.6 °F
  • Average 2020–2025

    49.7 °F
  • Average High 2020–2025

    58.5 °F
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