Sebastian Weather Forecast

    • 75
    • 92

    Slight Chance Thunderstorms

    • 75
    • 89

    Chance Thunderstorms

    • 76
    • 92

    Chance Rain Showers

    • 75
    • 90

    Chance Thunderstorms

    • 73
    • 88

    Rain Showers Likely

    • 73
    • 88

    Rain Showers Likely

Today 20 May Inland Willacy

Partly sunny. Humid with Highs in the lower 90s. Southeast Winds 10 to 15 Mph with Gusts up to 25 Mph.

Tonight 20 May Inland Willacy

Mostly cloudy with a chance of Showers and Thunderstorms. Near steady temperature in the upper 70s. Southeast Winds around 10 Mph with Gusts up to 20 Mph. Chance of rain 50 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Sebastian Temperature Statistics

May Temperature

Harlingen, Rio Grande Valley International Airport (11.2 miles)

  • Lowest 3 May, 2026

    56.6 °F

  • Average May

    79 °F

  • Highest 6 May, 2026

    96.7 °F

Climate (2021–Present)

Harlingen, Rio Grande Valley International Airport (11.2 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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