Climate Overview
The climate in Mahajanga is hot. The average annual temperature is 27°C and approximately 1381mm of precipitation falls per year. January is the wettest month, receiving around 531mm of rainfall. Mahajanga 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: April, October, May. The coldest months are July, August, June, when temperatures can drop to 21°C.
Temperature
Mahajanga sees moderate temperature variation throughout the year, ranging from 21°C to 32°C. The warmest month is April, when average highs reach 32°C and the mean temperature sits around 28°C. July is the coolest month, with minimum temperatures around 21°C and an average of 25°C. Daily temperature variation is modest, with an average difference of 7°C between highs and lows.
Precipitation
Mahajanga is a fairly wet location, receiving approximately 1381mm of precipitation annually, which averages out to around 115mm per month. The wettest month is January, averaging 531mm of rainfall. February and March also tend to see above-average precipitation. The driest month is July, with just 1mm. That's 530mm less than January, 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.
Wind
Mahajanga is mildly breezy, with an average annual wind speed of 18km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is October, averaging 21km/h, noticeable enough to affect lighter outdoor activities. The calmest conditions occur in March, with average winds dropping to 15km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 6km/h between the calmest and windiest months. Wind tends to be stronger during winter months, driven by seasonal pressure systems. The seasonal averages break down to 20km/h in winter, 20km/h in spring, 17km/h in summer, 16km/h in autumn.
Seasons
90 days until Winter
It is currently autumn in Mahajanga, which began on March 20, 2026. Mahajanga 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 April at around 32°C, while the coldest stretch bottoms out in July near 21°C. Winter is next, beginning on June 21, 2026 — 90 days from now.
Spring
Temperatures range from 23 to 32°C. Rainfall is relatively light, with around 112mm over the season and a monthly average of 37mm. Winds are moderate at around 20km/h. Light layers work well as temperatures warm through the season — a great time to be outdoors.
Summer
Temperatures range from 25 to 31°C. Rainfall is heavy, totalling around 1009mm across the season with a monthly average of 336mm. Winds are moderate at around 17km/h. Light, breathable clothing is ideal — perfect conditions for outdoor activities.
Autumn
Temperatures range from 24 to 32°C. Precipitation is moderate at around 255mm for the season, averaging 85mm per month. Winds are moderate at around 16km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.
Winter
Temperatures range from 21 to 30°C. Precipitation is minimal, with only around 5mm for the entire season. Winds are moderate at around 20km/h. A light jacket or sweater is usually sufficient, though cooler evenings may call for an extra layer.
Monthly Climate Data
The table below shows monthly climate averages for Mahajanga 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.
