Lamar Weather Forecast

    • 69
    • 96

    Hot

    • 70
    • 95

    Mostly Cloudy

    • 69
    • 96

    Hot

    • 69
    • 96

    Hot

    • 67
    • 94

    Hot

    • 65
    • 91

    Partly Sunny

Today 13 Sep Southern Johnson County

Mostly sunny. A slight chance of rain this afternoon. Highs in the mid 90s. Northeast Winds around 5 Mph, becoming south around 5 Mph this afternoon. Chance of rain 20 percent.

Tonight 13 Sep Southern Johnson County

Partly cloudy. Lows around 70. East Winds around 5 Mph.

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Lamar Temperature Statistics

September Temperature

Russelville Municipal Airport (20.5 miles)

  • Lowest 8 September, 2025

    53.1 °F

  • Average September

    71.7 °F

  • Highest 4 September, 2025

    93 °F

Climate (2020–Present)

Russelville Municipal Airport (20.5 miles)

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  • Average Low 2020–2025

    51.4 °F

  • Average 2020–2025

    62.5 °F

  • Average High 2020–2025

    74.2 °F
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