San Jeronimo De Tunan, in Junin, Peru, is home to roughly 8,800 people in the America/Lima time zone at 12°S latitude.
In 2025, San Jeronimo De Tunan recorded an average annual temperature of 53°F. The hottest temperatures reached 76°F in September; the coolest were 33°F in July. Total precipitation for the year was 65 inches, with the wettest month being March.
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