Jamestown Weather Forecast

    • 48
    • 67

    Chance Rain Showers

    • 66
    • 69

    Rain Showers

    • 58
    • 74

    Rain Showers

    • 61
    • 68

    Rain Showers Likely

    • 57
    • 73

    Chance Rain Showers

    • 56
    • 73

    Chance Rain Showers

Today 13 Sep Grant

Partly sunny. A slight chance of Showers in the afternoon. Highs around 70. North Winds 5 to 10 Mph. Chance of rain 20 percent.

Tonight 13 Sep Grant

Partly cloudy. Lows in the mid 50s. North Winds around 5 Mph.

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Jamestown Temperature Statistics

September Temperature

Platteville Municipal Airport (8.7 miles)

  • Lowest 10 September, 2026

    58.6 °F

  • Average September

    75.7 °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

    50 °F

  • Average High 2021–2026

    58.8 °F
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