With a population of around 25,900, Aserri sits in San Jose, Costa Rica. The city operates in the America/Costa Rica time zone.
In 2025, Aserri recorded an average annual temperature of 68°F. The hottest temperatures reached 84°F in March; the coolest were 54°F in December. Total precipitation for the year was 104 inches, with the wettest month being October.
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