Guaynabo Weather Forecast

    • 79
    • 87

    Rain Showers

    • 79
    • 87

    Rain Showers

    • 79
    • 87

    Rain Showers

    • 79
    • 87

    Rain Showers

    • 79
    • 86

    Rain Showers

    • 79
    • 86

    Rain Showers

Today 31 Oct San Juan and Vicinity

Partly cloudy in the Morning, then becoming mostly cloudy. Scattered Showers. Isolated Thunderstorms in the afternoon. Highs around 91. Temperature falling in the afternoon. East Winds 10 to 15 Mph. Chance of rain 50 percent.

Tonight 31 Oct San Juan and Vicinity

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

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Guaynabo Temperature Statistics

October Temperature

San Juan Fernando Luis Ribas Dominicci (6.8 miles)

  • Lowest 11 October, 2026

    77 °F

  • Average October

    86 °F

  • Highest 21 October, 2026

    93.2 °F

Climate (2021–2026)

San Juan Fernando Luis Ribas Dominicci (6.8 miles)

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  • Average Low 2021–2026

    77.8 °F

  • Average 2021–2026

    82.7 °F

  • Average High 2021–2026

    85.4 °F
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