Moroni weather in December

December in Moroni: sweltering, rainy, with clean air — fine if you can take 20 rainy days.

Updated September 2026 · climate normals from ERA5 reanalysis

Moroni🇰🇲 Comoros · Indian Ocean Islands · Island79
  1. 63Jan
  2. 72Feb
  3. 75Mar
  4. 77Apr
  5. 85May
  6. 88Jun
  7. 90Jul
  8. 93Aug
  9. 94Sep
  10. 91Oct
  11. 87Nov
  12. 79Dec

#8 of 12 months in Moroni · #490 of 1413 destinations to visit in December · comfort 79/100 (tier B)

Days
33°C
Nights
26°C
Wet days
20
Sun
11.6 h
Humidity
81%
Daylight
13 h
Moroni, Comoros
Photo: Woodlouse · CC BY-SA 2.0

Traveller notes on Moroni in December

Other months in Moroni

Forum posters describing Grande Comore note December through February brings the lowest hotel prices, generally a sign of the region's wetter, cyclone-season low period in the Southern Indian Ocean, with March sitting at the tail end of that stretch as conditions gradually improve. Posters contrast this with early October, explicitly within the dry season, describing around 28C heat with humidity near 100% in the island's forested interior even during that drier window. Given the limited March-specific detail available for Moroni, this note leans on that broader seasonal shape: expect March to still carry meaningful rain and humidity as the wet season winds down, improving but not yet at the dry-season comfort of the following months. Posters generally recommend a private taxi (negotiable from around 20 EUR) for the Moroni airport transfer and note a 30 EUR cash visa-on-arrival, practical logistics as relevant to a Moroni visit as the exact weather.
Tripadvisor community · March · 1 month ago · Read more on Tripadvisor ↗
Detailed trip reports for Comoros are genuinely scarce on the forum - one visitor recently back from Grande Comore specifically noted how hard it was to find much information about traveling there before their trip. Posters who have visited generally describe the islands as a warm, humid, little-touristed volcanic destination in the Indian Ocean. Given the sparse destination-specific detail, this note is grounded in the well-established regional pattern shared with nearby Indian Ocean islands: a drier, cooler southern-hemisphere-winter stretch roughly May through October, and September sits within that comparatively drier window, ahead of the hotter, wetter cyclone-season months from November through April.
Tripadvisor community · September · 1 month ago · Read more on Tripadvisor ↗

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Moroni climate normals — December

Daytime high33°C / 92°F🔥 sweltering
Nighttime low26°C / 78°F
Feels like (high)41°C / 106°F
Sea temperature29°C / 85°F♨️ bath-warm
Rainfall146 mm / 5.7 in🌧 rainy
Rainy days20 days
Humidity81%💦 very humid
Dew point24°C / 76°F
Sunshine11.6 h/day
Daylight12.8 h
Wind9 km/h / 6 mph
Air quality (US AQI)28🍃 good

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

Crowds in Moroni 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.

Shoulder seasonschool holidays in 5 of the markets that fill it, an ordinary month(estimated)

JFMAMJJASOND

Peak crowdsBusyShoulder seasonQuiet

Best months for Moroni'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).

Fair weatherMoroni's weather peaks August–October, best around September.

JFMAMJJASOND

Best weatherFair weatherToughest weather

What's on in Moroni in December

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

  • Season

    Kashkazi stops the boats

    1 Nov – 30 AprWind seasonClosuresRisk

    The north-westerly monsoon puts a heavy swell into Moroni's open roadstead, where boats are still loaded by launch. Inter-island crossings to Mohéli and Anjouan are cancelled for days at a stretch.

  • Hazard

    Cyclone season

    15 Nov – 30 Apr

    The south-west Indian Ocean season runs from mid-November to the end of April and peaks around January. Systems usually track south of the archipelago, but a close pass takes out power and the airport for days. Source ↗

What's on around the world in December →

Where is Moroni?

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Moroni in December — FAQ

Is December a good time to visit Moroni?
December in Moroni: sweltering, rainy, with clean air — fine if you can take 20 rainy days. It ranks #8 of 12 months for Moroni on SeasonMap's comfort score (79/100).
What is the weather like in Moroni in December?
In December, Moroni averages a daily high of 33.4°C and a low of 25.6°C, with about 145.7 mm of rain over roughly 20.4 rainy days.
What is the air quality in Moroni in December?
Moroni has a mean US Air Quality Index of about 28 in December.