Santa Rosa Lake Weather Forecast

    • 79
    • 99

    Hot

    • 77
    • 98

    Chance Thunderstorms

    • 74
    • 94

    Rain Showers

    • 73
    • 91

    Rain Showers

    • 72
    • 88

    Rain Showers

    • 71
    • 86

    Rain Showers

Today 30 Sep Inland Willacy

Mostly sunny. Humid with Highs in the upper 90s. Southeast Winds 15 to 20 Mph with Gusts up to 30 Mph. Heat index Values up to 115.

Tonight 30 Sep Inland Willacy

Mostly clear in the Evening, then becoming partly cloudy. Humid with Lows in the upper 70s. Southeast Winds 15 to 20 Mph with Gusts up to 30 Mph. Heat index Values up to 108 early in the evening.

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Santa Rosa Lake Temperature Statistics

September Temperature

Harlingen, Rio Grande Valley International Airport (9.3 miles)

  • Lowest 20 September, 2026

    71.7 °F

  • Average September

    88.8 °F

  • Highest 2 September, 2026

    104.6 °F

Climate (2021–2026)

Harlingen, Rio Grande Valley International Airport (9.3 miles)

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  • Average Low 2021–2026

    65.9 °F

  • Average 2021–2026

    76.1 °F

  • Average High 2021–2026

    87 °F
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