Jamestown Weather Forecast

    • 44
    • 66

    Clearing Late

    • 44
    • 63

    Partly Sunny

    • 46
    • 64

    Chance Rain Showers

    • 48
    • 62

    Chance Rain Showers

    • 52
    • 71

    Mostly Cloudy

    • 54
    • 78

    Partly Sunny

    • 59
    • 83

    Partly Sunny

Today 19 May Grant

Cloudy, cooler. Near steady temperature in the upper 50s. Northwest Winds 10 to 15 Mph.

Tonight 19 May Grant

Mostly cloudy this Evening, then becoming partly cloudy. Much Colder with Lows in the lower 40s. Northwest Winds 10 to 15 Mph.

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Jamestown Temperature Statistics

May Temperature

Platteville Municipal Airport (8.7 miles)

  • Lowest 2 May, 2026

    32 °F

  • Average May

    56.6 °F

  • Highest 15 May, 2026

    81.5 °F

Climate (2021–Present)

Platteville Municipal Airport (8.7 miles)

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  • Average Low 2021–2026

    40.7 °F

  • Average 2021–2026

    49.9 °F

  • Average High 2021–2026

    58.8 °F
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