Lake Dardanelle Weather Forecast

    • 78
    • 97

    Hot

    • 77
    • 97

    Hot

    • 75
    • 97

    Hot

    • 74
    • 96

    Mostly Sunny

    • 74
    • 95

    Mostly Sunny

    • 70
    • 91

    Chance Rain Showers

Today 15 Sep Southern Johnson County

Sunny, hot. Near steady temperature in the upper 90s. South Winds 5 to 10 Mph. Heat index Values up to 109.

Tonight 15 Sep Southern Johnson County

Mostly clear. Lows in the mid 70s. Southeast Winds 5 to 10 Mph, becoming northeast after midnight. Heat index Values up to 106 early in the evening.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Lake Dardanelle Temperature Statistics

September Temperature

Russelville Municipal Airport (15.5 miles)

  • Lowest 8 September, 2026

    69.7 °F

  • Average September

    86.4 °F

  • Highest 8 September, 2026

    104.6 °F

Climate (2021–2026)

Russelville Municipal Airport (15.5 miles)

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  • Average Low 2021–2026

    52.5 °F

  • Average 2021–2026

    63.9 °F

  • Average High 2021–2026

    75.7 °F
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