San Juan Weather in December

What's the weather like in San Juan (San Juan) in December 2022?

The climate in San Juan during December can be summarized as hot, humid and wet.

December is in the winter in San Juan and is typically the 4th coldest month of the year. Daytime maximum temperatures average around a muggy 28°C (82°F), whilst at night 21°C (70°F) is normal.

San Juan weather averages (imperial / metric)
Daytime temperature 27.5°C 81.5°F
Nightly temperature 21.1°C 70°F
Average temperature 24.3°C 75.7°F
Daily sunshine 7.6 hrs
Avg rainfall 151 mm 5.9 ins
Rainy days 21 days
Sea temperature 27.3°C 81.2°F
Humidity 75%
Windspeed 15.5kph 10 mph

On average December is the 5th driest month of the year in San Juan with around 151mm 5.9 inches of rain making it a wet time to visit. This rainfall is typically spread over 21 days, although this may vary considerably.

On the flip side this corresponds to an average of 7.6 hours of sunshine per day.

December temperatures in San Juan

San Juan average temperature in December

December rainfall

San Juan average rain in December

December hourly sunshine

San Juan average rain in December

The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in San Juan in December 2022.

Other monthly averages

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San Juan weather stats

San Juan weather statistics
Hottest month: August 30.2°C 86.4°F
Driest month: March 79mm 3.1ins
Sunniest month: March 9.6hrs
Coldest month: February 26.9°C 80.4°F
Wettest month: August 195mm 7.7ins
Map showing location of San Juan (18.46633, -66.10572)

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