Jamestown Weather Forecast

    • 50
    • 65

    Mostly Cloudy

    • 54
    • 65

    Slight Chance Rain Showers

    • 54
    • 64

    Mostly Cloudy

    • 56
    • 68

    Partly Sunny

    • 59
    • 66

    Rain Showers Likely

    • 57
    • 66

    Chance Rain Showers

Today 25 Sep Grant

Partly sunny. Near steady temperature in the mid 60s. East Winds around 5 Mph.

Tonight 25 Sep Grant

Mostly cloudy in the Evening, then becoming partly cloudy. Lows around 50. East Winds around 5 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Jamestown Temperature Statistics

September Temperature

Platteville Municipal Airport (8.7 miles)

  • Lowest 23 September, 2026

    48.2 °F

  • Average September

    68.3 °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

    58.7 °F
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