Guaynabo Weather Forecast

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    • 89

    Rain Showers

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    • 89

    Rain Showers

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    Rain Showers

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    Rain Showers

    • 79
    • 87

    Rain Showers

    • 79
    • 87

    Rain Showers

    • 78
    • 86

    Rain Showers

Today 28 Oct San Juan and Vicinity

Partly cloudy with isolated Showers in the Morning, then cloudy with numerous Showers with isolated Thunderstorms in the afternoon. Highs around 91. Temperature falling in the afternoon. Chance of rain 70 percent.

Tonight 28 Oct San Juan and Vicinity

Variably Cloudy, then becoming mostly clear late this Evening, then becoming partly cloudy. Scattered Showers, mainly this evening. Lows around 82. Southeast Winds 5 to 10 Mph. Chance of rain 40 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

    85.8 °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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