Clear Lake Weather Forecast

    • 68
    • 94

    Decreasing Clouds

    • 67
    • 92

    Mostly Sunny

    • 67
    • 92

    Mostly Sunny

    • 67
    • 93

    Partly Sunny

    • 68
    • 92

    Slight Chance Rain Showers

    • 68
    • 92

    Slight Chance Thunderstorms

    • 68
    • 93

    Mostly Sunny

Today 14 Sep Hays

Partly cloudy. Highs in the mid 90s. South Winds 5 to 10 Mph.

Tonight 14 Sep Hays

Partly cloudy. Lows in the upper 60s. South Winds around 5 Mph.

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  • Temperature Real-Time

Clear Lake Temperature Statistics

September Temperature

San Marcos, San Marcos Municipal Airport (18.6 miles)

  • Lowest 9 September, 2025

    61 °F

  • Average September

    81 °F

  • Highest 4 September, 2025

    102 °F

Climate (2020–Present)

San Marcos, San Marcos Municipal Airport (18.6 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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