With a population of around 40,700, Ouesso sits in Sangha, Republic of the Congo. The city operates in the Africa/Brazzaville time zone.
In 2025, Ouesso recorded an average annual temperature of 77°F. The hottest temperatures reached 94°F in March; the coolest were 65°F in January. Total precipitation for the year was 58 inches, with the wettest month being September.
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