Andasibe-Mantadia National Park weather in December

December in Andasibe-Mantadia National Park: warm, soaked, with clean air — fine if you can take 21 rainy days.

Updated September 2026 · climate normals from ERA5 reanalysis

Andasibe-Mantadia National Park🇲🇬 Madagascar · Indian Ocean Islands · National park65
  1. 56Jan
  2. 64Feb
  3. 66Mar
  4. 77Apr
  5. 83May
  6. 88Jun
  7. 87Jul
  8. 91Aug
  9. 92Sep
  10. 84Oct
  11. 76Nov
  12. 65Dec

#10 of 12 months in Andasibe-Mantadia National Park · #853 of 1413 destinations to visit in December · comfort 65/100 (tier C)

Days
27°C
Nights
18°C
Wet days
21
Sun
10.2 h
Humidity
83%
Daylight
13 h
Andasibe-Mantadia National Park, Madagascar
Photo: Smiley · CC BY-SA 4.0

Traveller notes on Andasibe-Mantadia National Park in December

Andasibe-Mantadia-forum threads on a December visit describe this as genuinely the start of the wettest stretch, one poster asking whether the park turns to a real mud bath by late December. Regulars call lemur activity a genuine concern this time of year, several posters warning lemurs largely sleep through heavy rain rather than moving, the whole reason most visitors come. Posters call April, May, October and November the real ideal months, several regulars naming these over December for more reliable indri and lemur sightings. Regulars call forest trails genuinely muddy and slippery from December through March, several threads warning conditions here are considerably tougher than in the drier months. Posters recommend real waterproof boots and flexible plans for a December trip, several regulars calling this standard advice given how unpredictable this season runs. The record: 27.2C days, 17.5C nights, an extraordinarily high 215.3mm across 21 days and 83 percent humidity.
AndasibeMantadiaDecemberRegular · December · 6 days ago · Read more on Tripadvisor ↗

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.
AndasibeMantadiaJulyRegular · July · 5 days ago · Read more on Tripadvisor ↗
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.
AndasibeMantadiaJanuaryRegular · January · 5 days ago · Read more on Tripadvisor ↗
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.
AndasibeMantadiaAugustRegular · August · 6 days ago · Read more on Tripadvisor ↗
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.
AndasibeMantadiaMayRegular · May · 6 days ago · Read more on Tripadvisor ↗

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Andasibe-Mantadia National Park climate normals — December

Daytime high27°C / 81°F🌤 warm
Nighttime low18°C / 64°F
Rainfall215 mm / 8.5 in⛈ soaked
Rainy days21 days
Humidity83%💦 very humid
Dew point18°C / 64°F
Sunshine10.2 h/day
Daylight13.2 h
Wind15 km/h / 9 mph
Air quality (US AQI)38🍃 good

Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.

Crowds in Andasibe-Mantadia National Park in December

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.

Quietschool holidays in 5 of the markets that fill it, one of its worst months for weather(estimated)

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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).

Toughest weatherAndasibe-Mantadia National Park's best weather comes in June, August and September — separate windows, not one continuous season.

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Best weatherFair weatherToughest weather

What's on in Andasibe-Mantadia National Park in December

Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.

  • Season

    Wet season

    MonsoonRisk

    21 rainy days and about 215 mm in the month — the real kind of rainy season, not afternoon showers.

    from the climate normals

What's on around the world in December →

Where is Andasibe-Mantadia National Park?

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Andasibe-Mantadia National Park in December — FAQ

Is December a good time to visit Andasibe-Mantadia National Park?
December in Andasibe-Mantadia National Park: warm, soaked, with clean air — fine if you can take 21 rainy days. It ranks #10 of 12 months for Andasibe-Mantadia National Park on SeasonMap's comfort score (65/100).
What is the weather like in Andasibe-Mantadia National Park in December?
In December, Andasibe-Mantadia National Park averages a daily high of 27.2°C and a low of 17.5°C, with about 215.3 mm of rain over roughly 21 rainy days.
What is the air quality in Andasibe-Mantadia National Park in December?
Andasibe-Mantadia National Park has a mean US Air Quality Index of about 38 in December.