Arroyo Alto Weather Forecast

    • 77
    • 99

    Chance Thunderstorms

    • 77
    • 98

    Chance Thunderstorms

    • 77
    • 97

    Chance Thunderstorms

    • 77
    • 97

    Chance Thunderstorms

    • 76
    • 97

    Chance Thunderstorms

    • 76
    • 98

    Chance Thunderstorms

Today 21 Sep Inland Cameron

Mostly sunny with a slight chance of Showers and Thunderstorms. Near steady temperature in the mid 90s. East Winds 10 to 15 Mph with Gusts up to 25 Mph. Chance of rain 20 percent. Heat index Values up to 110.

Tonight 21 Sep Inland Cameron

Mostly clear. Humid with Lows in the upper 70s. East Winds 10 to 15 Mph with Gusts up to 25 Mph, Diminishing to around 5 Mph after midnight.

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Arroyo Alto Temperature Statistics

September Temperature

Harlingen, Rio Grande Valley International Airport (11.8 miles)

  • Lowest 1 September, 2026

    74.6 °F

  • Average September

    89.6 °F

  • Highest 2 September, 2026

    104.6 °F

Climate (2021–2026)

Harlingen, Rio Grande Valley International Airport (11.8 miles)

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  • Average Low 2021–2026

    65.8 °F

  • Average 2021–2026

    76.1 °F

  • Average High 2021–2026

    86.9 °F
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