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San Juan weather in December 2021
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- 2828°C max day temperature
- 2121 days with some rainfall
- 2121°C min night temperature
- 1111 hours of daylight per day
- MModerate heat & humidity
- 151151 mm of monthly rainfall
- 88 (Very High) UV index
- 2727°C sea temperature
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The December 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.
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.
Metric (°C / mm) | Imperial (°F / inches)
San Juan sunrise & sunset times for December 2021
Browse the sunrise and sunset times for San Juan in December 2021. Select a month to view San Juan sunrise & sunset times for the next 12 months.
|Date||Sunrise times||Sunset times|
|Wednesday, 1st December 2021||06:41||17:47|
|Thursday, 16th December 2021||06:49||17:51|
|Friday, 31st December 2021||06:56||17:59|
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