San Juan Weather in January

What's the weather like in San Juan (San Juan) in January 2023?

The climate in San Juan during January can be summarized as hot, humid and damp.

January is in the winter in San Juan and is typically the 2nd coldest month of the year. Daytime maximum temperatures average around a muggy 27°C (80°F), whilst at night 20°C (68°F) is normal.

San Juan weather averages (imperial / metric)
Daytime temperature 26.9°C 80.4°F
Nightly temperature 20.1°C 68.2°F
Average temperature 23.5°C 74.3°F
Daily sunshine 8.3 hrs
Avg rainfall 116 mm 4.5 ins
Rainy days 20 days
Sea temperature 26.6°C 79.9°F
Humidity 75%
Windspeed 15.8kph 10 mph

On average January is the 3rd driest month of the year in San Juan with around 116mm 4.5 inches of rain making it a damp time to visit. This rainfall is typically spread over 20 days, although this may vary considerably.

On the flip side this corresponds to an average of 8.3 hours of sunshine per day.

January temperatures in San Juan

San Juan average temperature in January

January rainfall

San Juan average rain in January

January hourly sunshine

San Juan average rain in January

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 January 2023.

Other monthly averages

Best places to visit in January

UV index Best time to go?

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) San Juan map pin © Google

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