Los Fresnos Weather Forecast

    • 79
    • 99

    Hot

    • 80
    • 98

    Slight Chance Thunderstorms

    • 78
    • 96

    Chance Thunderstorms

    • 77
    • 95

    Chance Thunderstorms

    • 77
    • 95

    Mostly Sunny

    • 78
    • 97

    Slight Chance Thunderstorms

    • 78
    • 96

    Chance Thunderstorms

Today 15 Sep Inland Cameron

Sunny. A chance of Showers in the afternoon. Highs in the mid 90s. Chance of rain 40 percent. Heat index Values up to 110.

Tonight 15 Sep Inland Cameron

Mostly clear. Lows in the upper 70s. Southeast Winds 15 to 20 Mph with Gusts up to 30 Mph, Diminishing to around 5 Mph after midnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Los Fresnos Temperature Statistics

September Temperature

Port Isabel, Port Isabel-Cameron County Airport (9.9 miles)

  • Lowest 1 September, 2026

    77.6 °F

  • Average September

    88.5 °F

  • Highest 10 September, 2026

    100.7 °F

Climate (2021–2026)

Port Isabel, Port Isabel-Cameron County Airport (9.9 miles)

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  • Average Low 2021–2026

    68.8 °F

  • Average 2021–2026

    76.4 °F

  • Average High 2021–2026

    84.2 °F
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