Santa Rosa Lake Weather Forecast

    • 79
    • 96

    Mostly Cloudy

    • 79
    • 95

    Slight Chance Thunderstorms

    • 77
    • 92

    Slight Chance Thunderstorms

    • 76
    • 90

    Rain Showers Likely

    • 75
    • 90

    Chance Thunderstorms

    • 75
    • 89

    Rain Showers Likely

    • 74
    • 88

    Rain Showers Likely

Today 18 May Inland Willacy

Mostly sunny and windy. Near steady temperature in the mid 90s. Southeast Winds 20 to 30 Mph with Gusts up to 40 Mph. Heat index Values up to 110.

Tonight 18 May Inland Willacy

Mostly 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 107 early in the evening.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Santa Rosa Lake Temperature Statistics

May Temperature

Harlingen, Rio Grande Valley International Airport (9.3 miles)

  • Lowest 3 May, 2026

    56.6 °F

  • Average May

    78.6 °F

  • Highest 6 May, 2026

    96.7 °F

Climate (2021–Present)

Harlingen, Rio Grande Valley International Airport (9.3 miles)

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  • Average Low 2021–2026

    65.7 °F

  • Average 2021–2026

    75.7 °F

  • Average High 2021–2026

    86.6 °F
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