San Juan weather in December 2024

Expect 28°C daytime maximum temperatures in the shade with on average 7 hours of sunshine per day in San Juan in December. Check more long-term weather averages for San Juan in December before you book your next holiday to Puerto Rico in 2024/2025.

  • 28°C maximum daytime temperature in December in San Juan28
    28°C max day temperature
  • 7 hours of sunshine per day
  • 21 days with some rainfall in December in San Juan21
    21 days with some rainfall
  • 21°C minimum night-time temperature in December in San Juan21
    21°C min night temperature
  • 11 hours of daylight per day in December in San Juan11
    11 hours of daylight per day
  • Moderate heat & humidity in December in San JuanM
    Moderate heat & humidity
  • 151 mm monthly rainfall in December in San Juan151
    151 mm of monthly rainfall
  • UV (maximum) index 8 (Very High) in December in San Juan8
    8 (Very High) UV index
  • 27°C sea temperature in December in San Juan27
    27°C sea temperature

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The December 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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More about Puerto Rico

How hot is it in San Juan in December?

Daytime temperatures usually reach 28°C in San Juan in December with moderate heat and humidity, falling to 21°C at night.

How sunny is it in San Juan in December?

There are normally 7 hours of bright sunshine each day in San Juan in December - that's 63% of daylight hours.

How warm is the sea around San Juan in December?

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

Does it rain in San Juan in December?

There are usually 21 days with some rain in San Juan in December and the average monthly rainfall is 151mm.

San Juan December sunrise & sunset times

Browse the sunrise and sunset times for San Juan in December 2024. Select a month to view San Juan sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Sunday, 1st December 2024 06:41 17:47
Monday, 16th December 2024 06:50 17:51
Tuesday, 31st December 2024 06:56 17:59

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