Climate Insights for Mananjary

The climate in Mananjary is warm and mild. The average annual temperature is 24°C and approximately 1809mm of precipitation falls per year. Mananjary receives a notable amount of rainfall throughout the year, including during its driest month. Mananjary is in the Southern Hemisphere. The seasons are reversed — summer runs from December to February, while winter falls between June and August. The summer months are: December, January, February. The coldest months are July, August, June, when temperatures can drop to 19°C.

Mananjary has relatively stable temperatures year-round, staying within a 10°C range. The warmest month is December, when average highs reach 29°C and the mean temperature sits around 27°C. July is the coolest month, with minimum temperatures around 19°C and an average of 21°C. Daily temperature variation is modest, with an average difference of 5°C between highs and lows.

Mananjary is a fairly wet location, receiving approximately 1809mm of precipitation annually, which averages out to around 151mm per month. The wettest month is February, averaging 347mm of rainfall. March and January also tend to see above-average precipitation. The driest month is September, with just 48mm. That's 299mm less than February, the wettest month. Rainfall is heavily concentrated in certain months, creating a distinct wet and dry season. Visitors should plan around these patterns, as the difference between peak and low months is dramatic.

Mananjary is mildly breezy, with an average annual wind speed of 15km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is November, averaging 19km/h, though still comfortable for most outdoor activities. The calmest conditions occur in July, with average winds dropping to 12km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 7km/h gap between the calmest and windiest months. Wind tends to pick up during the summer months. The seasonal averages are 13km/h in winter, 18km/h in spring, 17km/h in summer, 13km/h in autumn.

It is currently autumn in Mananjary, which began on March 20, 2026. Mananjary is in the Southern Hemisphere, where the seasons are reversed — spring starts in September, summer in December, autumn in March, and winter in June. The warmest period peaks in December at around 29°C, while the coldest stretch bottoms out in July near 19°C. Winter is next, beginning on June 21, 2026 — 89 days from now.

The best time to visit Mananjary is during July, August, September and October, when the weather is most comfortable for travellers. During these months, average temperatures hover around 22°C with modest rainfall averaging 62mm per month. By contrast, December can be uncomfortably hot with temperatures reaching 29°C. A light rain jacket is recommended, though showers are generally brief and shouldn't disrupt your plans.

The table below shows monthly climate averages for Mananjary based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.