Rend Lake Weather Forecast

    • 62
    • 83

    Mostly Sunny

    • 65
    • 89

    Mostly Sunny

    • 67
    • 93

    Sunny

    • 69
    • 94

    Mostly Sunny

    • 71
    • 94

    Mostly Sunny

    • 70
    • 94

    Partly Sunny

Today 9 Sep Franklin

Sunny. Highs in the mid 80s. Southeast Winds around 5 Mph.

Tonight 9 Sep Franklin

Mostly clear. Lows in the mid 50s. Southeast Winds around 5 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Rend Lake Temperature Statistics

September Temperature

Mount Vernon Airport (18.6 miles)

  • Lowest 3 September, 2025

    52 °F

  • Average September

    67.5 °F

  • Highest 3 September, 2025

    87.1 °F

Climate (2020–Present)

Mount Vernon Airport (18.6 miles)

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  • Average Low 2020–2025

    45.7 °F

  • Average 2020–2025

    56.7 °F

  • Average High 2020–2025

    67.8 °F
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