San Juan weather in May 2026

Expect daytime maximum temperatures of 29°C in San Juan, Puerto Rico in May and high heat and humidity based on long-term weather averages. There are 8 hours of sunshine per day on average with 16 days with some rainfall and typically 182 mm of rainfall in the month.

• 29
  29°C max day temperature
• 8
  8 hours of sunshine per day
• 16
  16 days with some rainfall
• 22
  22°C min night temperature
• 13
  13 hours of daylight per day
• H
  High heat & humidity
• 182
  182 mm of monthly rainfall
• 11
  11+ (Extreme) UV index
• 27
  27°C sea temperature

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The May weather guide for Puerto Rico (San Juan) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Metric (°C / mm)  |  Imperial (°F / inches)

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San Juan May sunrise & sunset times

Browse the sunrise and sunset times for San Juan in May 2026. Select a month to view San Juan sunrise and sunset times for the next 12 months.

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