Fort Pierce South Weather Forecast

    • 74
    • 85

    Rain Showers Likely

    • 74
    • 84

    Thunderstorms Likely

    • 75
    • 86

    Thunderstorms Likely

    • 75
    • 87

    Thunderstorms Likely

    • 74
    • 88

    Thunderstorms Likely

    • 74
    • 89

    Chance Thunderstorms

Today 17 Sep Coastal St. Lucie

Mostly cloudy late in the morning then becoming cloudy. Showers and Thunderstorms likely. Highs in the mid 80s. East Winds 5 to 10 Mph. Chance of rain 60 percent.

Tonight 17 Sep Coastal St. Lucie

Mostly cloudy with a chance of Thunderstorms. Showers likely in the late evening and early Morning, then a chance of Showers after midnight. Lows in the mid 70s. East Winds 5 to 10 Mph. Chance of rain 70 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Fort Pierce South Temperature Statistics

September Temperature

Fort Pierce, St. Lucie County International Airport (5.6 miles)

  • Lowest 15 September, 2025

    70 °F

  • Average September

    79.4 °F

  • Highest 2 September, 2025

    89.1 °F

Climate (2020–Present)

Fort Pierce, St. Lucie County International Airport (5.6 miles)

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  • Average Low 2020–2025

    66.1 °F

  • Average 2020–2025

    74.7 °F

  • Average High 2020–2025

    83.5 °F
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