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.
|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|
|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.
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 2022.
|Hottest month:||August||30.2°C 86.4°F|
|Driest month:||March||79mm 3.1ins|
|Coldest month:||February||26.9°C 80.4°F|
|Wettest month:||August||195mm 7.7ins|