With a population of around 23,300, San Marcos sits in Carazo Department, Nicaragua. The city operates in the America/Managua time zone.
In 2025, San Marcos recorded an average annual temperature of 74°F. The hottest temperatures reached 89°F in March; the coolest were 66°F in February. Total precipitation for the year was 63 inches, with the wettest month being October.
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