Jamestown Weather Forecast

    • 67
    • 84

    Rain Showers Likely

    • 65
    • 82

    Rain Showers

    • 60
    • 77

    Partly Sunny

    • 62
    • 79

    Mostly Sunny

    • 62
    • 81

    Mostly Sunny

Today 20 Jun Clinton

Sunny. Near steady temperature in the lower 80s. Northwest Winds around 5 Mph.

Tonight 20 Jun Clinton

Mostly clear in the Evening, then becoming partly cloudy. Lows in the mid 60s. Northeast Winds around 5 Mph, becoming east after midnight.

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  • Temperature Real-Time

Jamestown Temperature Statistics

June Temperature

Belleville, Scott AFB/MidAmerica Airport (21.7 miles)

  • Lowest 3 June, 2026

    55.2 °F

  • Average June

    76.1 °F

  • Highest 9 June, 2026

    92.8 °F

Climate (2021–2026)

Belleville, Scott AFB/MidAmerica Airport (21.7 miles)

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  • Average Low 2021–2026

    47.8 °F

  • Average 2021–2026

    57.8 °F

  • Average High 2021–2026

    68.1 °F
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