Arroyo weather in December 2026

Expect daytime maximum temperatures of 29°C in Arroyo, Puerto Rico in December and high heat and humidity based on long-term weather averages. There are 7 hours of sunshine per day on average with 21 days with some rainfall and typically 64 mm of rainfall in the month.

  • 29°C maximum daytime temperature in December in Arroyo29
    29°C max day temperature
  • 7 hours of sunshine per day
  • 21 days with some rainfall in December in Arroyo21
    21 days with some rainfall
  • 22°C minimum night-time temperature in December in Arroyo22
    22°C min night temperature
  • 11 hours of daylight per day in December in Arroyo11
    11 hours of daylight per day
  • High heat & humidity in December in ArroyoH
    High heat & humidity
  • 64 mm monthly rainfall in December in Arroyo64
    64 mm of monthly rainfall
  • UV (maximum) index 8 (Very High) in December in Arroyo8
    8 (Very High) UV index
  • 27°C sea temperature in December in Arroyo27
    27°C sea temperature

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The December weather guide for Puerto Rico (Arroyo) 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 Arroyo in December?

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

How sunny is it in Arroyo in December?

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

How warm is the sea around Arroyo in December?

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

Does it rain in Arroyo in December?

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

Arroyo December sunrise & sunset times

Browse the sunrise and sunset times for Arroyo in December 2026. Select a month to view Arroyo sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Tuesday, 1st December 2026 06:39 17:47
Wednesday, 16th December 2026 06:48 17:52
Thursday, 31st December 2026 06:55 18:00

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