Jupiter Island Weather Forecast

    • 77
    • 89

    Thunderstorms Likely

    • 77
    • 89

    Thunderstorms Likely

    • 77
    • 88

    Rain Showers

    • 78
    • 88

    Thunderstorms Likely

    • 78
    • 89

    Chance Thunderstorms

    • 77
    • 89

    Chance Thunderstorms

Today 5 Sep Coastal Martin

Partly sunny with Showers and Thunderstorms likely. Highs around 90. South Winds 5 to 10 Mph. Chance of rain 70 percent. Heat index Values up to 104.

Tonight 5 Sep Coastal Martin

Partly cloudy. Lows in the mid 70s. Southwest Winds around 5 Mph.

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Jupiter Island Temperature Statistics

September Temperature

Witham Field Airport (12.4 miles)

  • Lowest 1 September, 2026

    77 °F

  • Average September

    80.4 °F

  • Highest 1 September, 2026

    87.8 °F

Climate (2021–2026)

Witham Field Airport (12.4 miles)

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  • Average Low 2021–2026

    69.4 °F

  • Average 2021–2026

    74.6 °F

  • Average High 2021–2026

    83.1 °F
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