Spring Lake Weather Forecast

    • 77
    • 102

    Slight Chance Thunderstorms

    • 77
    • 100

    Hot

    • 76
    • 99

    Hot

    • 75
    • 100

    Hot

    • 75
    • 98

    Hot

    • 74
    • 98

    Slight Chance Thunderstorms

    • 73
    • 97

    Hot

Today 12 Sep Hays

Mostly sunny with a slight chance of Showers and Thunderstorms. Hot with Highs around 100. South Winds 5 to 10 Mph with Gusts up to 20 Mph. Chance of rain 20 percent. Highest heat index Readings up to 109.

Tonight 12 Sep Hays

Partly cloudy. A slight chance of Showers this evening. Lows in the mid 70s. South Winds 5 to 10 Mph with Gusts up to 25 Mph. Chance of rain 20 percent. Highest heat index Readings up to 105 early this evening.

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Spring Lake Temperature Statistics

September Temperature

San Marcos, San Marcos Municipal Airport (3.7 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 (3.7 miles)

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  • Average Low 2021–2026

    60.1 °F

  • Average 2021–2026

    71 °F

  • Average High 2021–2026

    82.6 °F
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