Climate Insights for Fianarantsoa

The climate in Fianarantsoa is warm and mild. The average annual temperature is 18°C and approximately 1702mm of precipitation falls per year. Fianarantsoa receives a notable amount of rainfall throughout the year, including during its driest month. Fianarantsoa 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: February, December, January. The coldest months are July, August, June, when temperatures can drop to 11°C.

Fianarantsoa sees moderate temperature variation throughout the year, ranging from 11°C to 26°C. The warmest month is February, when average highs reach 26°C and the mean temperature sits around 21°C. July is the coolest month, with minimum temperatures around 11°C and an average of 14°C. Daily temperature variation is modest, with an average difference of 8°C between highs and lows. The sharpest temperature change occurs between September and October, with a 2°C shift in average temperatures.

Fianarantsoa is a fairly wet location, receiving approximately 1702mm of precipitation annually, which averages out to around 142mm per month. The wettest month is January, averaging 316mm of rainfall. February and March also tend to see above-average precipitation. The driest month is August, with just 31mm. That's 285mm 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.

Fianarantsoa is relatively calm, with an average annual wind speed of 2km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is September, averaging 3km/h, though still comfortable for most outdoor activities. The calmest conditions occur in February, with average winds dropping to 2km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 1km/h between the calmest and windiest months.

It is currently winter in Fianarantsoa, which began on June 21, 2026. Fianarantsoa 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 February at around 26°C, while the coldest stretch bottoms out in July near 11°C. Spring is next, beginning on September 23, 2026 — 93 days from now.

The best time to visit Fianarantsoa is during May, August, September and October, when the weather is most comfortable for travellers. During these months, average temperatures hover around 17°C with modest rainfall averaging 60mm per month. By contrast, February can be uncomfortably hot with highs reaching 26°C, while July is the coldest period with lows dropping to 11°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 Fianarantsoa 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.