Andasibe-Mantadia National Park weather in September
September in Andasibe-Mantadia National Park: nice, dry, with clean air — one of the best months to visit.
Updated September 2026 · climate normals from ERA5 reanalysis
#1 of 12 months in Andasibe-Mantadia National Park · #110 of 1413 destinations to visit in September · comfort 92/100 (tier S)
- Days
- 22°C
- Nights
- 13°C
- Wet days
- 8
- Sun
- 9.8 h
- Humidity
- 81%
- Daylight
- 12 h

Traveller notes on Andasibe-Mantadia National Park in September
Andasibe-Mantadia-forum reviews on a September visit describe indri sightings as a genuine highlight, posters calling the loud, unmistakable indri call a real feature here that visitors hear well before they see the animal. Regulars call black-and-white ruffed lemurs, red-bellied lemurs and bamboo lemurs all realistically sightable on the same visit, several posters listing multiple species spotted in a single morning walk. Posters recommend the Mitsinjo side of the Analamazaotra forest as a real alternative to the main park entrance, several regulars naming it for guided night walks. Regulars call September genuinely good timing, orchid blossoms starting through September into November and nocturnal lemurs still active. Posters recommend booking a local guide regardless of which entrance is used, several threads calling this standard for spotting species easy to miss alone. The record: 22.1C days, 13.1C nights, 23.9mm across 8 days and 81 percent humidity.
Other months in Andasibe-Mantadia National Park
Andasibe-Mantadia-forum reviews on a July visit describe conditions as genuinely cool and misty, posters naming this a real contrast to the warmer, wetter months earlier in the year. Regulars call July genuinely within the highland cooler stretch, several posters naming lower rainfall and cooler temperatures as standard for a winter visit here. Posters call the Indri still genuinely active despite cooler weather, several regulars naming morning calls as reliably audible even on misty days. Regulars call layered clothing a real necessity for July, several threads warning mornings can feel considerably colder than visitors expect from a tropical rainforest destination. Posters recommend an early start regardless of mist, several regulars calling this standard given how much clearer visibility tends to be before midday haze builds. The record: 19.3C days, 12.6C nights, 44.3mm across nearly 17 days and 87 percent humidity.
Andasibe-Mantadia-forum reviews on a January visit describe real steady rain as a standard feature, one visitor recalling near-constant downpours yet still hearing the Indri's haunting calls echo through the forest each morning. Regulars call January genuinely deep in the wet season, several posters naming this the tradeoff for visiting when the forest is lushest and most active. Posters call Indri sightings still genuinely reliable despite the rain, several regulars naming black-and-white ruffed, red-bellied and bamboo lemurs as other real highlights spotted on January visits. Regulars call a real poncho and waterproof bag essential gear here, several threads warning trails turn muddy once rain sets in. Posters recommend an early start regardless of weather, several regulars calling this standard given how much louder Indri calls carry before the day heats up. The record: 26.8C days, 18C nights, an extraordinarily high 330.5mm across 24 days and 86 percent humidity.
Andasibe-Mantadia-forum reviews on an August visit describe hearing the indri's call as genuinely one of the most memorable parts of a visit, posters calling the sound carrying through the canopy a real highlight regardless of dates. Regulars call Analamazaotra and the nearby VOIMMA reserve real complementary options, several posters recommending both since VOIMMA's shorter trees make indri sightings genuinely easier. Posters call the cooler months from June-September a real period when reptile activity shifts, several regulars noting shoulder months can offer easier spotting for some species. Regulars call Mantadia genuinely less visited, several threads describing it as a real primary rainforest drawing noticeably fewer visitors than the main reserve. Posters recommend a local guide and an early start regardless of section, several regulars calling this standard for maximizing sightings. The record: 21.1C days, 12.4C nights, 33.9mm across over 8 days and 84 percent humidity.
Andasibe-Mantadia-forum reviews on a May visit describe this as genuinely one of the real ideal months for lemur viewing, posters naming April, May, October, November as the best windows. Regulars call the Analamazaotra Special Reserve the real spot for indri specifically, several posters warning not to expect close encounters since the animals stay up in the canopy rather than coming down. Posters call Mantadia, roughly twenty kilometers north, a real complement to the main reserve, several regulars naming black-and-white ruffed lemurs and diademed sifaka as species found only there. Regulars call an early start genuinely essential regardless of section, several threads warning animal activity drops off noticeably later in the morning. Posters recommend a local guide for either section on a May visit, several regulars calling this standard for spotting species easy to miss alone. The record: 22.9C days, 15.2C nights, 60.1mm across 14 days and 85 percent humidity.
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Andasibe-Mantadia National Park climate normals — September
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in Andasibe-Mantadia National Park in September
How busy the place itself is — school and mass holidays, the months an editor tagged, and how sought-after the weather makes them. Never part of the comfort score.
Busyschool holidays in 2 of the markets that fill it, one of its best months for weather(estimated)
Peak crowdsBusyShoulder seasonQuiet
Best months for Andasibe-Mantadia National Park's weather
Ranked by this destination's own climate comfort score across the year — a different thing from how busy it gets (see Crowds above).
Best weatherAndasibe-Mantadia National Park's best weather comes in June, August and September — separate windows, not one continuous season.
Best weatherFair weatherToughest weather
Nearby, and something's on
Within 300 km of Andasibe-Mantadia National Park — a day trip or a short hop — with something on this month. Never part of the comfort score.
Where is Andasibe-Mantadia National Park?
Andasibe-Mantadia National Park in September — FAQ
- Is September a good time to visit Andasibe-Mantadia National Park?
- September in Andasibe-Mantadia National Park: nice, dry, with clean air — one of the best months to visit. It ranks #1 of 12 months for Andasibe-Mantadia National Park on SeasonMap's comfort score (92/100).
- What is the weather like in Andasibe-Mantadia National Park in September?
- In September, Andasibe-Mantadia National Park averages a daily high of 22.1°C and a low of 13.1°C, with about 23.9 mm of rain over roughly 8 rainy days.
- What is the air quality in Andasibe-Mantadia National Park in September?
- Andasibe-Mantadia National Park has a mean US Air Quality Index of about 27 in September.
Within 300 km: Antananarivo's Famadihana season around 15 Jun – 30 Sep.