Arroyo Weather Forecast

    • 77
    • 87

    Rain Showers

    • 79
    • 86

    Rain Showers

    • 78
    • 87

    Rain Showers

    • 78
    • 88

    Rain Showers

    • 78
    • 88

    Rain Showers

    • 78
    • 88

    Rain Showers

    • 79
    • 88

    Rain Showers

Today 17 Sep Southeast

Cloudy. Showers and scattered Thunderstorms late this Morning, then numerous Showers with 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 80 percent.

Tonight 17 Sep Southeast

Cloudy. Numerous Showers with isolated Thunderstorms this Evening, then Showers and scattered Thunderstorms after midnight. Lows around 83. East Winds 5 to 10 Mph. Chance of rain 80 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Arroyo Temperature Statistics

September Temperature

San Juan, Luis Munoz Marin International Airport (33.6 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 (33.6 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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