Rio Piedras Weather Forecast

    • 78
    • 89

    Rain Showers

    • 76
    • 89

    Rain Showers

    • 76
    • 90

    Rain Showers

    • 76
    • 91

    Rain Showers

    • 77
    • 90

    Rain Showers

    • 77
    • 90

    Rain Showers

Today 29 Sep San Juan and Vicinity

Variably cloudy with scattered Showers. Isolated Thunderstorms this afternoon. Highs around 91. Temperature falling this afternoon. East Winds 10 to 15 Mph with Gusts up to 25 Mph. Chance of rain 50 percent.

Tonight 29 Sep San Juan and Vicinity

Partly cloudy. Isolated Showers in the Evening, then scattered Showers after midnight. Lows around 80. East Winds 10 to 15 Mph. Chance of rain 40 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Rio Piedras Temperature Statistics

September Temperature

San Juan, Luis Munoz Marin International Airport (4.3 miles)

  • Lowest 1 September, 2026

    75.7 °F

  • Average September

    85.1 °F

  • Highest 25 September, 2026

    95.6 °F

Climate (2021–2026)

San Juan, Luis Munoz Marin International Airport (4.3 miles)

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  • Average Low 2021–2026

    77 °F

  • Average 2021–2026

    82.2 °F

  • Average High 2021–2026

    87.8 °F
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