Mercedes, in Buenos Aires, Argentina, is home to roughly 63,300 people in the America/Argentina/Buenos Aires time zone at 34.7°S latitude.
In 2025, Mercedes recorded an average annual temperature of 62°F. The hottest temperatures reached 96°F in December; the coolest were 26°F in July. Total precipitation for the year was 50 inches, with the wettest month being March.
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