Rend Lake State Waterfowl Management Area Weather Forecast

    • 64
    • 91

    Becoming Sunny

    • 72
    • 97

    Hot

    • 71
    • 100

    Hot

    • 62
    • 86

    Slight Chance Thunderstorms

    • 66
    • 89

    Chance Rain Showers

    • 68
    • 93

    Slight Chance Rain Showers

Today 7 Sep Jefferson

Sunny. Highs around 90. Northeast Winds 5 to 10 Mph.

Tonight 7 Sep Jefferson

Partly cloudy. Near steady temperature in the upper 60s. Northeast Winds around 5 Mph.

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Rend Lake State Waterfowl Management Area Temperature Statistics

September Temperature

Mount Vernon Airport (11.8 miles)

  • Lowest 1 September, 2026

    66.9 °F

  • Average September

    84.3 °F

  • Highest 2 September, 2026

    100.9 °F

Climate (2021–2026)

Mount Vernon Airport (11.8 miles)

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  • Average Low 2021–2026

    46.8 °F

  • Average 2021–2026

    58 °F

  • Average High 2021–2026

    69.2 °F
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