Arnold Lake Dam Weather Forecast

    • 60
    • 80

    Partly Sunny

    • 65
    • 85

    Partly Sunny

    • 63
    • 86

    Partly Sunny

    • 63
    • 85

    Partly Sunny

    • 62
    • 85

    Partly Sunny

    • 62
    • 87

    Mostly Sunny

Today 21 Dec La Salle

Partly cloudy this Morning, then clearing. Widespread dense fog this morning. Highs in the upper 70s. Northeast Winds 5 to 10 Mph.

Tonight 21 Dec La Salle

Mostly clear in the Evening, then becoming mostly cloudy. Patchy fog after midnight. Lows in the upper 50s. Northeast Winds around 5 Mph.

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Arnold Lake Dam Temperature Statistics

December Temperature

Cotulla, Cotulla-La Salle County Airport (35.4 miles)

  • Lowest 2 December, 2025

    37 °F

  • Average December

    57.7 °F

  • Highest 7 December, 2025

    84 °F

Climate (2020–Present)

Cotulla, Cotulla-La Salle County Airport (35.4 miles)

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  • Average Low 2020–2025

    64.5 °F

  • Average 2020–2025

    75.8 °F

  • Average High 2020–2025

    88.1 °F
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