Barth Lake Weather Forecast

    • 56
    • 91

    Increasing Clouds

    • 53
    • 88

    Partly Sunny

    • 49
    • 78

    Breezy

    • 44
    • 78

    Sunny

    • 53
    • 82

    Partly Sunny

    • 60
    • 85

    Partly Sunny

Today 13 Mar Caldwell

Sunny. Highs in the lower 90s. Southwest Winds 5 to 10 Mph.

Tonight 13 Mar Caldwell

Partly cloudy. Lows in the upper 50s. South Winds 5 to 10 Mph with Gusts up to 20 Mph.

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Barth Lake Temperature Statistics

March Temperature

San Marcos, San Marcos Municipal Airport (10.6 miles)

  • Lowest 10 March, 2025

    37 °F

  • Average March

    63.8 °F

  • Highest 8 March, 2025

    86 °F

Climate (2020–Present)

San Marcos, San Marcos Municipal Airport (10.6 miles)

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  • Average Low 2020–2025

    59.1 °F

  • Average 2020–2025

    69.7 °F

  • Average High 2020–2025

    81.5 °F
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