About Mana, Guyane's Climate & Weather History

With a population of around 5,900, Mana sits in Guyane, GF. The city operates in the America/Cayenne time zone.

In 2025, Mana recorded an average annual temperature of 79°F. The hottest temperatures reached 90°F in September; the coolest were 72°F in January. Total precipitation for the year was 111 inches, with the wettest month being June.