San Martin, in Cuscatlan, El Salvador, is home to roughly 39,400 people in the America/El Salvador time zone at 13.8°N latitude.
Recent weather here gives a sense of typical conditions: in 2025, San Martin recorded a mean annual temperature of 77°F, ranging from 63°F lows in January to 100°F highs in April, with about 54 inches of precipitation across the year.
View historical weather for San Martin · More cities in Cuscatlan