Lake Dardanelle Weather Forecast

    • 80
    • 98

    Hot

    • 80
    • 100

    Hot

    • 75
    • 95

    Sunny

    • 75
    • 92

    Mostly Sunny

    • 76
    • 92

    Mostly Cloudy

    • 77
    • 94

    Partly Sunny

Today 20 Jul Southern Johnson County

Sunny. A slight chance of Showers and Thunderstorms in the afternoon. Highs in the upper 90s. West Winds around 5 Mph. Chance of rain 20 percent. Heat index Values up to 112.

Tonight 20 Jul Southern Johnson County

Mostly clear. Lows in the mid 70s. Northwest Winds around 5 Mph in the Evening, becoming light and variable. Heat index Values up to 110 early in the evening.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Lake Dardanelle Temperature Statistics

July Temperature

Russelville Municipal Airport (15.5 miles)

  • Lowest 7 July, 2026

    68.6 °F

  • Average July

    83 °F

  • Highest 10 July, 2026

    97.6 °F

Climate (2021–2026)

Russelville Municipal Airport (15.5 miles)

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  • Average Low 2021–2026

    52.5 °F

  • Average 2021–2026

    63.8 °F

  • Average High 2021–2026

    75.5 °F
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