Barth Lake Weather Forecast

    • 73
    • 91

    Chance Thunderstorms

    • 72
    • 92

    Slight Chance Thunderstorms

    • 72
    • 94

    Partly Sunny

    • 74
    • 95

    Partly Sunny

    • 74
    • 94

    Partly Sunny

    • 74
    • 97

    Hot

    • 74
    • 98

    Hot

Today 25 Jun Caldwell

Mostly cloudy. A slight chance of Showers and Thunderstorms this Morning, then a chance of Showers and Thunderstorms this afternoon. Highs in the lower 90s. Southeast Winds 5 to 10 Mph. Chance of rain 40 percent.

Tonight 25 Jun Caldwell

Partly cloudy. Lows in the lower 70s. Southeast Winds 5 to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Barth Lake Temperature Statistics

June Temperature

San Marcos, San Marcos Municipal Airport (10.6 miles)

  • Lowest 13 June, 2025

    64.9 °F

  • Average June

    82.4 °F

  • Highest 9 June, 2025

    98.1 °F

Climate (2020–Present)

San Marcos, San Marcos Municipal Airport (10.6 miles)

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  • Average Low 2020–2025

    59.2 °F

  • Average 2020–2025

    69.9 °F

  • Average High 2020–2025

    81.6 °F
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