Jamestown Weather Forecast

    • 63
    • 72

    Mostly Cloudy

    • 61
    • 76

    Rain Showers Likely

    • 64
    • 74

    Rain Showers

    • 62
    • 79

    Chance Thunderstorms

    • 57
    • 71

    Chance Rain Showers

    • 55
    • 70

    Slight Chance Rain Showers

Today 16 Sep Grant

Mostly cloudy. Highs in the lower 70s. East Winds 5 to 10 Mph.

Tonight 16 Sep Grant

Mostly cloudy. A chance of Showers after midnight. Lows in the lower 60s. Southeast Winds around 5 Mph. Chance of rain 40 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Jamestown Temperature Statistics

September Temperature

Platteville Municipal Airport (8.7 miles)

  • Lowest 13 September, 2026

    52.3 °F

  • Average September

    73.3 °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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