San Juan in September

Peak hurricane season; heavy rain.

All twelve months in one grid — weather, crowds and prices, with gaps left as unknown.

September is rated avoid. These months rate higher:

• DecemberGreatDry, warm; long Christmas season and higher prices.
• JanuaryGreatDry, warm; Three Kings Day and Calle San Sebastián fiesta.
• FebruaryGreatDry and warm; peak season.
• MarchGreatDry, warm; spring-break crowds.

• San JuanHighs around 32 °C (90 °F), lows around 25 °C (77 °F), rain on about 15 daysHighs around 90 °F (32 °C), lows around 77 °F (25 °C), rain on about 15 days
• San Juan and north coast, Puerto Rico · San Juan, Isabela, Arecibostorm or typhoon risk

  Around 27–31 °C (81–88 °F) all year; showers are short but frequent May–November; winter swells make some north-coast beaches rough.Around 81–88 °F (27–31 °C) all year; showers are short but frequent May–November; winter swells make some north-coast beaches rough.

Dates as our data lists them. Moving holidays (lunar and Islamic calendars, Easter) shift every year: check the date for your year before you build a trip on it.

• Hurricane season

  June to November; peak August to October · Whole island

  Storms can close airports, ports, forts and roads for days.

Crowds · Puerto Rico overall

Low

Prices · Puerto Rico overall

Low

Puerto Rico overall: Peak hurricane month (Maria struck 20 Sep 2017).

Weather, crowds and prices for any two months in San Juan, side by side.

• Light, breathable clothes, a sun hat and sunscreen
• A rain jacket or umbrella and shoes that dry fast
• A spare day in the plan: storms can cancel flights and ferries

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