St Joseph Island Weather Forecast

    • 70
    • 73

    Chance Thunderstorms

    • 71
    • 77

    Chance Thunderstorms

    • 72
    • 78

    Chance Thunderstorms

    • 73
    • 79

    Partly Sunny

    • 73
    • 80

    Partly Sunny

    • 73
    • 80

    Mostly Cloudy

    • 74
    • 81

    Mostly Cloudy

Today 20 Apr Aransas Islands

A chance of Thunderstorms. Showers. Highs in the lower 70s. East Winds 15 to 20 Mph. Chance of rain 80 percent.

Tonight 20 Apr Aransas Islands

Mostly cloudy. A chance of Showers and Thunderstorms, mainly this evening. Lows around 70. East Winds 15 to 20 Mph, becoming southeast 10 to 15 Mph after midnight. Chance of rain 50 percent.

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St Joseph Island Temperature Statistics

April Temperature

Rockport Aransas County Airport (8.7 miles)

  • Lowest 5 April, 2026

    56.6 °F

  • Average April

    75.5 °F

  • Highest 4 April, 2026

    85.6 °F

Climate (2021–Present)

Rockport Aransas County Airport (8.7 miles)

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  • Average Low 2021–2026

    67.6 °F

  • Average 2021–2026

    74.6 °F

  • Average High 2021–2026

    82 °F
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