Rend Lake State Wildlife Refuge Weather Forecast

    • 52
    • 74

    Mostly Sunny

    • 53
    • 74

    Mostly Sunny

    • 55
    • 76

    Partly Sunny

    • 56
    • 74

    Mostly Cloudy

    • 56
    • 73

    Mostly Cloudy

    • 56
    • 73

    Mostly Sunny

Today 23 Oct Jefferson

Sunny. Highs in the mid 70s. East Winds around 5 Mph.

Tonight 23 Oct Jefferson

Mostly clear. Lows in the mid 40s. East Winds around 5 Mph in the Evening, becoming light and variable.

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Rend Lake State Wildlife Refuge Temperature Statistics

October Temperature

Mount Vernon Airport (13.7 miles)

  • Lowest 18 October, 2026

    32 °F

  • Average October

    63.8 °F

  • Highest 13 October, 2026

    93 °F

Climate (2021–2026)

Mount Vernon Airport (13.7 miles)

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  • Average Low 2021–2026

    46.8 °F

  • Average 2021–2026

    58.1 °F

  • Average High 2021–2026

    69.3 °F
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