Port Mansfield Weather Forecast

    • 78
    • 87

    Chance Thunderstorms

    • 78
    • 87

    Chance Thunderstorms

    • 78
    • 87

    Chance Thunderstorms

    • 80
    • 87

    Chance Thunderstorms

    • 80
    • 88

    Chance Thunderstorms

    • 79
    • 88

    Rain Showers Likely

Today 18 Sep Coastal Willacy

Mostly sunny with a chance of Showers. A slight chance of Thunderstorms this Morning, then a chance of Thunderstorms this afternoon. Highs around 90. East Winds 10 to 15 Mph. Chance of rain 40 percent.

Tonight 18 Sep Coastal Willacy

Partly cloudy. Lows in the mid 70s. East Winds 10 to 15 Mph, Diminishing to around 5 Mph after midnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Port Mansfield Temperature Statistics

September Temperature

Harlingen, Rio Grande Valley International Airport (26.1 miles)

  • Lowest 16 September, 2025

    70 °F

  • Average September

    82.9 °F

  • Highest 4 September, 2025

    100 °F

Climate (2020–Present)

Harlingen, Rio Grande Valley International Airport (26.1 miles)

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  • Average Low 2020–2025

    65.4 °F

  • Average 2020–2025

    75.2 °F

  • Average High 2020–2025

    86.1 °F
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