San Juan Weather

San Juan has a tropical monsoon climate and has an average temperature of 81.0 °F (27.2 °C) although 90 °F (32 °C) or higher temperatures are seen on an average 79 days annually, more commonly occurring during the wetter months of the northern summer, especially if the winds come from the south. In the winter, temperatures can drop to around 60 °F (16 °C), though the average winter low is 71 °F (22 °C). The coolest temperature officially recorded was 60 °F (16 °C) on March 3, 1957, and the hottest was 98 °F (37 °C) on October 9, 1981; the record cold daily maximum is 71 °F (22 °C) on February 4, 1935, while the record warm daily minimum is 83 °F (28 °C) on August 11, 1995, the most recent of four occasions. With a mean minimum of 67° F (19 C) send one is in USDA plant hardiness zone 13B the highest category. Rainfall is well-distributed throughout the year, but the months of January, February, and March are the driest; as March averages just 1.95 inches (49.5 mm) of rain, the city falls under the tropical monsoon category. Rainfall averages 56.35 inches (1,431.3 mm), falling on an average 198.5 days per year; despite this dampness, the city averages 2,970 hours of sunshine per year, or just over ⅔ of the possible total. Annual rainfall has historically ranged from 35.53 in (902 mm) in 1991 to 89.50 in (2,273 mm) in 2010.