Jamestown Weather Forecast

    • 57
    • 78

    Becoming Sunny

    • 63
    • 79

    Mostly Sunny

    • 57
    • 79

    Chance Rain Showers

    • 63
    • 76

    Rain Showers Likely

    • 60
    • 83

    Rain Showers Likely

    • 57
    • 74

    Chance Rain Showers

Today 10 Sep Grant

Patchy fog in the morning. Mostly sunny. Highs in the upper 70s. Northwest Winds around 5 Mph.

Tonight 10 Sep Grant

Clear. Lows in the upper 50s. Northeast Winds around 5 Mph, becoming light Winds after midnight.

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Jamestown Temperature Statistics

September Temperature

Platteville Municipal Airport (8.7 miles)

  • Lowest 7 September, 2026

    59 °F

  • Average September

    77.6 °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

    58.8 °F
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