Jamestown Weather Forecast

    • 52
    • 72

    Mostly Sunny

    • 61
    • 72

    Rain Showers Likely

    • 62
    • 70

    Rain Showers

    • 50
    • 67

    Chance Rain Showers

    • 47
    • 64

    Mostly Sunny

    • 50
    • 64

    Partly Sunny

Today 28 Sep Grant

Mostly sunny. Highs in the lower 70s. Light Winds.

Tonight 28 Sep Grant

Partly cloudy. Lows in the lower 50s. Southeast Winds around 5 Mph.

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  • Temperature Real-Time

Jamestown Temperature Statistics

September Temperature

Platteville Municipal Airport (8.7 miles)

  • Lowest 23 September, 2026

    48.2 °F

  • Average September

    67.5 °F

  • Highest 4 September, 2026

    91.6 °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

    58.7 °F
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