Rend Lake Weather Forecast

    • 74
    • 95

    Slight Chance Thunderstorms

    • 75
    • 95

    Partly Sunny

    • 72
    • 94

    Partly Sunny

    • 66
    • 87

    Chance Thunderstorms

    • 60
    • 76

    Partly Sunny

    • 59
    • 75

    Partly Sunny

Today 18 Sep Franklin

Sunny, hot with Highs in the upper 90s. Calm Winds, becoming northwest around 5 Mph this afternoon.

Tonight 18 Sep Franklin

Mostly cloudy with a slight chance of Showers and Thunderstorms in the Evening, then partly cloudy after midnight. Lows in the lower 70s. East Winds around 5 Mph. Chance of rain 20 percent.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Rend Lake Temperature Statistics

September Temperature

Mount Vernon Airport (18.6 miles)

  • Lowest 8 September, 2026

    55 °F

  • Average September

    79.5 °F

  • Highest 2 September, 2026

    100.9 °F

Climate (2021–2026)

Mount Vernon Airport (18.6 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2021–2026

    46.8 °F

  • Average 2021–2026

    58.1 °F

  • Average High 2021–2026

    69.2 °F
Get WillyWeather+ to remove ads