With a population of around 2,100, San Agustin sits in Usulutan, El Salvador. The city operates in the America/El Salvador time zone.
In 2025, San Agustin averaged an annual temperature of 78°F, with hottest temperatures reaching 100°F in March and lowest around 69°F in April. The city received approximately 80 inches of precipitation during the year.
View historical weather for San Agustin · More cities in Usulutan