Cupey Weather Forecast

    • 75
    • 88

    Rain Showers

    • 76
    • 87

    Rain Showers

    • 76
    • 89

    Rain Showers

    • 76
    • 88

    Rain Showers

    • 76
    • 89

    Rain Showers

    • 76
    • 90

    Rain Showers

    • 76
    • 90

    Rain Showers

Today 17 Sep San Juan and Vicinity

Cloudy. Showers and scattered Thunderstorms late this Morning, then numerous Showers with isolated Thunderstorms this afternoon. Highs around 90. Temperature falling this afternoon. East Winds 10 to 15 Mph. Chance of rain 80 percent.

Tonight 17 Sep San Juan and Vicinity

Mostly cloudy with isolated Thunderstorms. Scattered Showers in the Evening, then numerous Showers after midnight. Lows around 83. Southeast Winds 10 to 15 Mph. Chance of rain 70 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Cupey Temperature Statistics

September Temperature

San Juan, Luis Munoz Marin International Airport (7.5 miles)

  • Lowest 8 September, 2025

    75.9 °F

  • Average September

    83.1 °F

  • Highest 10 September, 2025

    93 °F

Climate (2020–Present)

San Juan, Luis Munoz Marin International Airport (7.5 miles)

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  • Average Low 2020–2025

    76.9 °F

  • Average 2020–2025

    81.9 °F

  • Average High 2020–2025

    87.5 °F
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