Yearly weather and climate in San Juan, Puerto Rico

The yearly weather in San Juan runs from around 22°C in February to 32°C in June. January is the driest month at 15 rainy days; September the wettest at 22. Here is the annual climate data, so you know what you are packing for.

Best time to visit

Weather is fairly consistent year-round. Pack for stable conditions.

Sunshine

Expect up to 12.1 hours of clear skies in Jun, but only 9.8 hours in Nov. Pack sunglasses and SPF accordingly.

Rainfall

It rains the most in Oct (129mm over 20 days). A reliable rain jacket is a must-have if visiting then.

Day-to-night swings

Temperatures typically drop by 6°C from day to night. Make sure to pack layers for the evenings.

Average temperatures and rainfall

Daily highs and lows in San Juan, averaged over 10 years of recorded weather, with the number of days it typically rains.

  1. 2883°2272°15Jan
  2. 2882°2272°17Feb
  3. 2983°2272°17Mar
  4. 2985°2373°18Apr
  5. 3188°2475°18May
  6. 3289°2577°19Jun
  7. 3187°2578°21Jul
  8. 3188°2678°19Aug
  9. 3187°2577°22Sep
  10. 3187°2576°20Oct
  11. 2985°2475°18Nov
  12. 2883°2373°17Dec

Bars span the average daily low to high. Numbers under the drop are rainy days per month (1mm or more) — hover a month for its total rainfall. Jan is typically driest at 15 days (67mm); Sep the wettest at 22 days (126mm).

Average monthly temperature and rainfall in San Juan
MonthAverage highAverage lowRainy daysTotal rainfall
Jan28°C22°C1567mm
Feb28°C22°C1777mm
Mar29°C22°C1761mm
Apr29°C23°C1890mm
May31°C24°C1880mm
Jun32°C25°C1976mm
Jul31°C25°C2196mm
Aug31°C26°C19108mm
Sep31°C25°C22126mm
Oct31°C25°C20129mm
Nov29°C24°C18118mm
Dec28°C23°C1770mm

Weather data by Open-Meteo.com

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