Arroyo weather in December 2026

Q: 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.

Q: 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.

Q: How warm is the sea around Arroyo in December?

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

Q: 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.

Expect daytime maximum temperatures of 84°F 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 2.5 inches of rainfall in the month.

84
84°F max day temperature
7
7 hours of sunshine per day
21
21 days with some rainfall
72
72°F min night temperature
11
11 hours of daylight per day
H
High heat & humidity
2.5
2.5 inches of monthly rainfall
8
8 (Very High) UV index
81
81°F 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) | Imperial (°F)

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How hot is it in Arroyo in December?

Daytime temperatures usually reach 82°F in Arroyo in December with moderate heat and humidity, falling to 70°F 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 81°F.

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 5.9 inches.

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.

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

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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Puerto Rico - quick facts
Flight time^✝	12 to 13 hours
Time difference	UK -4 hours
Language(s)	Spanish, English
Currency	United States Dollar
Electricity	A + B plug (120V)
Driving side	Right
Visa^✝	Yes