San Juan Weather Forecast

    • 81
    • 86

    Rain Showers

    • 80
    • 84

    Rain Showers

    • 80
    • 83

    Rain Showers

    • 81
    • 84

    Partly Sunny

    • 80
    • 85

    Mostly Sunny

    • 80
    • 85

    Rain Showers

Today 7 Sep San Juan and Vicinity

Variably Cloudy, then becoming mostly cloudy late this Morning, then becoming variably Cloudy, then becoming mostly cloudy late. Isolated Thunderstorms. Scattered Showers this Morning, then numerous Showers this afternoon. Highs around 92. Southeast Winds 10 to 15 Mph. Chance of rain 60 percent.

Tonight 7 Sep San Juan and Vicinity

Partly cloudy with isolated Showers in the Evening, then mostly cloudy with scattered Showers with isolated Thunderstorms after midnight. Lows around 82. Southeast Winds 5 to 10 Mph. Chance of rain 50 percent.

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San Juan Temperature Statistics

September Temperature

San Juan Fernando Luis Ribas Dominicci (0.6 miles)

  • Lowest 1 September, 2026

    77 °F

  • Average September

    85.7 °F

  • Highest 4 September, 2026

    89.6 °F

Climate (2021–2026)

San Juan Fernando Luis Ribas Dominicci (0.6 miles)

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  • Average Low 2021–2026

    77.7 °F

  • Average 2021–2026

    82.6 °F

  • Average High 2021–2026

    85.4 °F
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