Vergennes Weather Forecast

    • 68
    • 95

    Mostly Sunny

    • 64
    • 88

    Mostly Sunny

    • 67
    • 90

    Partly Sunny

    • 69
    • 88

    Chance Rain Showers

    • 67
    • 84

    Chance Rain Showers

    • 67
    • 87

    Slight Chance Thunderstorms

Today 28 Jul Jackson

Mostly sunny. Hot with Highs in the mid 90s. Northwest Winds 5 to 10 Mph, becoming north in the afternoon. Highest heat index Readings heat index Readings up to 106 in the afternoon.

Tonight 28 Jul Jackson

Mostly cloudy in the Evening, then becoming partly cloudy. Lows in the upper 60s. Northeast Winds 5 to 10 Mph.

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Vergennes Temperature Statistics

July Temperature

Southern Illinois Airport (9.3 miles)

  • Lowest 23 July, 2026

    62.6 °F

  • Average July

    80 °F

  • Highest 2 July, 2026

    95.6 °F

Climate (2021–2026)

Southern Illinois Airport (9.3 miles)

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  • Average Low 2021–2026

    48.2 °F

  • Average 2021–2026

    58.7 °F

  • Average High 2021–2026

    69.3 °F
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