Carter Lake Weather Forecast

    • 72
    • 97

    Hot

    • 71
    • 97

    Hot

    • 72
    • 95

    Chance Thunderstorms

    • 72
    • 92

    Chance Thunderstorms

    • 72
    • 95

    Slight Chance Thunderstorms

    • 72
    • 96

    Slight Chance Thunderstorms

Today 24 Aug Guadalupe

Mostly sunny. Highs in the upper 90s. North Winds 5 to 10 Mph, becoming east this afternoon.

Tonight 24 Aug Guadalupe

Mostly clear. Lows in the lower 70s. Southeast Winds 5 to 10 Mph, becoming southwest after midnight.

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Carter Lake Temperature Statistics

August Temperature

San Marcos, San Marcos Municipal Airport (18 miles)

  • Lowest 5 August, 2025

    70 °F

  • Average August

    85.7 °F

  • Highest 2 August, 2025

    102 °F

Climate (2020–Present)

San Marcos, San Marcos Municipal Airport (18 miles)

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  • Average Low 2020–2025

    59.2 °F

  • Average 2020–2025

    69.8 °F

  • Average High 2020–2025

    81.5 °F
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