Rend Lake Weather Forecast

    • 79
    • 93

    Slight Chance Thunderstorms

    • 79
    • 94

    Mostly Sunny

    • 78
    • 94

    Slight Chance Thunderstorms

    • 78
    • 93

    Slight Chance Thunderstorms

    • 78
    • 94

    Slight Chance Thunderstorms

    • 77
    • 94

    Mostly Sunny

Today 23 Jul Franklin

Sunny, hot with Highs in the mid 90s. South Winds around 5 Mph. Highest heat index Readings heat index Readings up to 106 in the afternoon.

Tonight 23 Jul Franklin

Mostly clear. Near steady temperature in the mid 70s. Southeast Winds around 5 Mph.

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Rend Lake Temperature Statistics

July Temperature

Mount Vernon Airport (18.6 miles)

  • Lowest 2 July, 2025

    63.6 °F

  • Average July

    79.1 °F

  • Highest 11 July, 2025

    97 °F

Climate (2020–Present)

Mount Vernon Airport (18.6 miles)

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  • Average Low 2020–2025

    45.7 °F

  • Average 2020–2025

    56.5 °F

  • Average High 2020–2025

    67.7 °F
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