Pierce Lake Weather Forecast

    • 72
    • 95

    Decreasing Clouds

    • 72
    • 96

    Mostly Sunny

    • 72
    • 96

    Partly Sunny

    • 73
    • 97

    Hot

    • 73
    • 97

    Hot

    • 73
    • 96

    Partly Sunny

    • 72
    • 96

    Partly Sunny

Today 18 Sep Hays

Partly cloudy. Highs in the upper 90s. East Winds 5 to 10 Mph.

Tonight 18 Sep Hays

Partly cloudy this Evening, then clearing. Lows in the lower 70s. South Winds 5 to 10 Mph.

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  • Temperature Real-Time

Pierce Lake Temperature Statistics

September Temperature

San Marcos, San Marcos Municipal Airport (20.5 miles)

  • Lowest 8 September, 2026

    72 °F

  • Average September

    86.1 °F

  • Highest 2 September, 2026

    102.9 °F

Climate (2021–2026)

San Marcos, San Marcos Municipal Airport (20.5 miles)

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  • Average Low 2021–2026

    60.2 °F

  • Average 2021–2026

    71 °F

  • Average High 2021–2026

    82.6 °F
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