San Juan weather in May 2021

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  • 29°C maximum daytime temperature in May in San Juan29
    29°C max day temperature
  • 8 hours of sunshine per day
  • 16 days with some rainfall in May in San Juan16
    16 days with some rainfall
  • 22°C minimum night-time temperature in May in San Juan22
    22°C min night temperature
  • 13 hours of daylight per day in May in San Juan13
    13 hours of daylight per day
  • High heat & humidity in May in San JuanH
    High heat & humidity
  • 182 mm monthly rainfall in May in San Juan182
    182 mm of monthly rainfall
  • UV (maximum) index 11+ (Extreme) in May in San Juan11
    11+ (Extreme) UV index
  • 27°C sea temperature in May in San Juan27
    27°C sea temperature

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The May weather guide for San Juan, Puerto Rico 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.

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How hot is it in San Juan in May?

Daytime temperatures usually reach 29°C in San Juan in May with high heat and humidity, falling to 22°C at night.

How sunny is it in San Juan in May?

There are normally 8 hours of bright sunshine each day in San Juan in May - that's 63% of daylight hours.

How warm is the sea around San Juan in May?

The average sea temperature around San Juan in May is 27°C.

Does it rain in San Juan in May?

There are usually 16 days with some rain in San Juan in May and the average monthly rainfall is 182mm.

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

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San Juan sunrise & sunset times for May 2021

Browse the sunrise and sunset times for San Juan in May 2021. Select a month to view San Juan sunrise & sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Saturday, 1st May 2021 05:57 18:46
Sunday, 16th May 2021 05:50 18:51
Monday, 31st May 2021 05:47 18:57
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