Mananjary in Summer
In summer (December, January and February), Mananjary sees average daytime highs around 29°C and overnight lows near 24°C, with 739 mm of rain over about 68 wet days across the season. It is the warmest season of the year and the wettest season of the year.
Across summer, daytime highs hold fairly steady around 29°C. The sky is clear or mostly clear about 19% of the time across summer, and the air most often feels oppressive.
Summer is Mananjary's weakest season of the year to visit on our travel score. For the whole year in context, see Mananjary's year-round climate.
- Avg daytime high
- 29°C
- warmest season of the year
- Avg overnight low
- 24°C
- Rainfall
- 739 mm
- 68 wet days
- Avg wind
- 10 km/h
- Travel score
- 3.8
- weakest season of the year
- Months
- Dec · Jan · Feb
Temperature in Mananjary in Summer
Across summer, daytime highs hold fairly steady around 29°C.
A typical summer day in Mananjary reaches about 29°C and drops to 24°C overnight. The warmest of the three months is January, the coolest December.
How summer really feels in Mananjary
Once humidity and wind are folded in, summer brings about 81 days that feel above 32°C and 0 that feel at or below 0°C.
The story in summer is heat — humidity pushes the afternoon "feels like" well above the raw temperature.
Mananjary weather by month
How the three summer months (December, January and February) compare with the rest of the year — the season's months are highlighted.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 29° / 25° | 312 | 25.1 | 13.1 | 3.5 |
| Feb | 29° / 25° | 274 | 23.6 | 12.7 | 3.5 |
| Mar | 29° / 24° | 279 | 24.9 | 12.2 | 3.8 |
| Apr | 28° / 23° | 164 | 20.9 | 11.5 | 4.9 |
| May | 26° / 21° | 141 | 19 | 11 | 5.5 |
| Jun | 24° / 19° | 92 | 16.9 | 10.7 | 6.0 |
| Jul | 23° / 18° | 94 | 17.8 | 10.8 | 6.0 |
| Aug | 24° / 18° | 57 | 13.2 | 11.3 | 6.8 |
| Sep | 25° / 19° | 48 | 10 | 11.9 | 7.2 |
| Oct | 26° / 21° | 60 | 10.7 | 12.5 | 6.8 |
| Nov | 28° / 23° | 85 | 12.7 | 13 | 5.9 |
| Dec | 29° / 24° | 152 | 19.4 | 13.3 | 4.4 |
Cloud cover in Summer
The sky is clear or mostly clear about 19% of the time across summer.
Chance of precipitation in Summer
Mananjary gets around 739 mm of rain over 68 wet days across summer. The line is the day-by-day chance of measurable precipitation.
Humidity in Summer
Most of summer feels oppressive — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Summer
Winds average 10 km/h across summer.
Sunrise & sunset in Summer
Daylight runs from about 13 h 12 min in early December to 12 h 30 min by late February. The lit band spans sunrise to sunset each day.
Solar energy in Summer
Average shortwave solar energy reaching the ground each day across summer, about 5.8 kWh/m².
Hazard calendar for Mananjary
In summer, Mananjary overlaps its cyclone and rainy season season. The full year is below, with each hazard's peak months called out.
Mananjary sits in the South Indian Ocean cyclone belt; the season peaks January–March.
Mananjary's rainy season runs December–May, when most of the year's rain falls.
Is summer a good time to visit Mananjary?
Our two travel scores rate summer for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
summer is a weaker month for outdoor sightseeing in Mananjary.
What to pack for Mananjary in Summer
From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In summer, Mananjary sees daytime highs around 29°C and nights near 24°C. Pack light clothes, rain gear and sun protection. About 68 days see rain.
Sea temperature near Mananjary in Summer
The nearest coast averages about 28°C across summer — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea at the nearest coast (about 16 km away) is warmest in February at about 28°C and coldest in August near 24°C.
The water stays above 20°C all year — warm enough for a swim any month.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 28 | 28 | 28 | 28 | 27 | 26 | 25 | 24 | 24 | 25 | 26 | 27 |
| Comfort | Tropical | Tropical | Tropical | Warm | Warm | Warm | Warm | Warm | Warm | Warm | Warm | Warm |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 28 | Tropical |
| Feb | 28 | Tropical |
| Mar | 28 | Tropical |
| Apr | 28 | Warm |
| May | 27 | Warm |
| Jun | 26 | Warm |
| Jul | 25 | Warm |
| Aug | 24 | Warm |
| Sep | 24 | Warm |
| Oct | 25 | Warm |
| Nov | 26 | Warm |
| Dec | 27 | Warm |
UV index in Mananjary in Summer
Clear-sky midday UV across summer averages around 15 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Mananjary peaks around February 12 at about 16 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 18 at about 6 (high).
The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 14 | 16 | 13 | 10 | 7 | 6 | 6 | 8 | 9 | 11 | 12 | 14 |
| Level | Extreme | Extreme | Extreme | Very high | Very high | High | High | Very high | Very high | Extreme | Extreme | Extreme |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 14 | Extreme |
| Feb | 16 | Extreme |
| Mar | 13 | Extreme |
| Apr | 10 | Very high |
| May | 7 | Very high |
| Jun | 6 | High |
| Jul | 6 | High |
| Aug | 8 | Very high |
| Sep | 9 | Very high |
| Oct | 11 | Extreme |
| Nov | 12 | Extreme |
| Dec | 14 | Extreme |
Air quality in Mananjary in Summer
Average fine-particle pollution (PM2.5) through the year — so you can see where summer falls, not just the annual average.
Air quality in Mananjary is worst in October — around 36 µg/m³ PM2.5 (poor), about 5.6× the cleanest month (February, 6 µg/m³).
Modeled monthly averages (CAMS reanalysis, 2015–2024).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 8 | 6 | 7 | 9 | 13 | 13 | 12 | 11 | 14 | 36 | 22 | 10 |
| Level | Good | Good | Good | Good | Moderate | Moderate | Good | Good | Moderate | Poor | Moderate | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 8 | Good |
| Feb | 6 | Good |
| Mar | 7 | Good |
| Apr | 9 | Good |
| May | 13 | Moderate |
| Jun | 13 | Moderate |
| Jul | 12 | Good |
| Aug | 11 | Good |
| Sep | 14 | Moderate |
| Oct | 36 | Poor |
| Nov | 22 | Moderate |
| Dec | 10 | Good |
Where is Mananjary?
Mananjary sits at 21.2°S, 48.3°E, 7 m above sea level, in Madagascar. The nearest listed city is Sahavato, 70 km away.
Topography around Mananjary
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Mananjary.
Within 3 km, the terrain around Mananjary has only modest variations in elevation — a maximum elevation change of 41 m around an average of 6 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 86 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,258 m.
The land around Mananjary is covered by water (37%), trees (25%) and grassland (21%) within 3 km, water (46%), grassland (25%) and trees (22%) within 16 km, and water (35%), grassland (29%) and trees (22%) within 80 km.
Madagascar travel facts
- Travel advisory
- Level 2
- Exercise Increased Caution
- Power plugs
- Type C / E
- 220 V · 50 Hz
- Prices
- ≈ 31% of US
- price level, 2025
- GDP per capita
- $599
- 2025
- Happiness
- 4.2 / 10
- World Happiness, 2025
- Safe drinking water
- 22%
- of population, 2024
- Road deaths
- 29.2
- per 100k/yr, 2019
- Income group
- Low
- World Bank
- English
- Low
- EF EPI 457
- Religion
Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.
Data sources
Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Mananjary (-21.2303°, 48.3417°, elevation 7 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google.