With a population of around 33,800, Antiguo Cuscatlan sits in La Libertad Department, El Salvador. The city operates in the America/El Salvador time zone.
In 2025, Antiguo Cuscatlan recorded an average annual temperature of 73°F. The hottest temperatures reached 93°F in April; the coolest were 61°F in April. Total precipitation for the year was 69 inches, with the wettest month being June.
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