<Li> <P> Coat of arms of San Juan </P> </Li> <P> Coat of arms of San Juan </P> <P> San Juan is located along the north - eastern coast of Puerto Rico . It lies south of the Atlantic Ocean; north of Caguas and Trujillo Alto; east of and Guaynabo; and west of Carolina . The city occupies an area of 76.93 square miles (199.2 km), of which, 29.11 square miles (75.4 km) (37.83%) is water . San Juan's main water bodies are San Juan Bay and two natural lagoons, the Condado and San José . </P> <P> San Juan has a tropical monsoon climate and enjoys 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 . 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 2⁄3 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 . </P>

Where is the capital of puerto rico located