Mananjary weather in September

In September, Mananjary sees average daytime highs of 25°C and overnight lows near 19°C, with 48 mm of rain across 10 wet days and about 11.9 hours of daylight. It is the 9th-warmest and 12th-wettest month of the year here.

Day-to-day highs hold fairly steady near 25°C through the month. The sky is clear or mostly clear about 55% of the time in September, and the air most often feels muggy.

Daylight stretches from about 11 h 36 min at the start of September to 12 h 12 min by month's end. Set against the rest of the year, September is Mananjary's 1st-clearest and 3rd-windiest month. For the whole year in context, see Mananjary's year-round climate.

Daytime high
25°
9th warmest
Overnight low
19°
4th coldest
Rainfall
48 mm
10 wet days
Daylight
11 h 54 min
5:45 AM – 5:37 PM
Cloud cover
40%
1st clearest
Wind
11 km/h
3rd windiest
Solar energy
5.14 kWh/m²
Travel score
7.2
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 25°C through the month.

A typical September day in Mananjary reaches about 25°C in the afternoon and slips back to 19°C overnight — a 5°C spread between the day's warmth and the night's chill. On most days the high lands between 23°C and 26°C. Set against its neighbours, September runs about 1°C warmer than August and about 1°C cooler than October.

15°20°25°30°151015202530
Avg high (°C)Avg low (°C)
12419
22419
32419
42419
52419
62419
72419
82419
92419
102419
112419
122519
132519
142519
152519
162519
172519
182519
192520
202520
212520
222520
232520
242520
252520
262520
272520
282520
292520
302520

How September really feels in Mananjary

Once humidity and wind are folded in, September averages 0 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C
0
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

September sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Mananjary weather by month

How September compares with the rest of the year at a glance. September is the 9th-warmest and 12th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan29° / 25°31225.113.13.5
Feb29° / 25°27423.612.73.5
Mar29° / 24°27924.912.23.8
Apr28° / 23°16420.911.54.9
May26° / 21°14119115.5
Jun24° / 19°9216.910.76.0
Jul23° / 18°9417.810.86.0
Aug24° / 18°5713.211.36.8
Sep25° / 19°481011.97.2
Oct26° / 21°6010.712.56.8
Nov28° / 23°8512.7135.9
Dec29° / 24°15219.413.34.4

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 55% of the time in September, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 22% of September, with mostly cloudy or overcast conditions the remaining 23%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
18020
28020
37921
47921
57921
67921
77822
87822
97723
107723
117624
127624
137525
147525
157426
167426
177525
187525
197525
207525
217525
227624
237723
247723
257723
267723
277723
287822
297723
307723

Chance of precipitation in September

Any precipitation

Mananjary gets around 48 mm of rain over 10 wet days in September, the driest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 34% and peaks near 42% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%40%50%151015202530
Rain chance (%)
142
241
340
440
539
638
737
836
935
1034
1133
1232
1332
1431
1531
1631
1731
1831
1931
2031
2131
2231
2331
2431
2531
2631
2731
2831
2931
3032

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

Most of September feels muggy — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, September lands in the muggy band about 61% of days. Sticky, muggy-or-worse air turns up on roughly 62% of them.

0%25%50%75%100%151015202530
Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1548470
2547480
3546490
4546500
5545500
6445510
7444520
8443530
9443530
10442540
11441550
12441550
13440560
14339580
15337600
16336610
17335620
18333640
19232651
20231661
21229681
22228691
23227692
24126712
25125722
26124723
27123733
28122734
29121744
30120745

Wind in September

Winds average 11 km/h in September.

Across September, daily wind ranges from about 10 km/h on the calmest days to 12 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
110calm
210calm
310calm
410calm
510calm
610calm
710calm
810calm
910calm
1010calm
1110calm
1211calm
1311calm
1411calm
1511calm
1611calm
1711calm
1811calm
1911calm
2011calm
2111calm
2211calm
2311calm
2411calm
2511calm
2611calm
2712calm
2812calm
2912calm
3012calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 11 h 36 min at the start of September to 12 h 12 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 36 minutes over September. Sunrise moves from 5:59 AM to 5:31 AM, and sunset from 5:34 PM to 5:41 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.65:595:34
211.65:585:34
311.65:575:34
411.65:565:34
511.75:555:35
611.75:545:35
711.75:535:35
811.75:525:35
911.75:515:36
1011.85:515:36
1111.85:505:36
1211.85:495:36
1311.85:485:37
1411.85:475:37
1511.95:465:37
1611.95:455:37
1711.95:445:38
1811.95:435:38
1911.95:425:38
2012.05:415:38
2112.05:405:39
2212.05:395:39
2312.05:385:39
2412.05:375:39
2512.15:365:40
2612.15:355:40
2712.15:345:40
2812.15:335:41
2912.25:325:41
3012.25:315:41

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.14 kWh/m².

For context, solar energy here swings from a low near 3.28 kWh/m² to a high of 6.32 kWh/m² in December across the year — September's 5.14 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
14.7Bright
24.7Bright
34.8Bright
44.8Bright
54.8Bright
64.8Bright
74.9Bright
84.9Bright
94.9Bright
104.9Bright
115.0Bright
125.0Bright
135.0Bright
145.1Bright
155.1Bright
165.1Bright
175.2Bright
185.2Bright
195.2Bright
205.3Bright
215.3Bright
225.3Bright
235.4Bright
245.4Bright
255.4Bright
265.5Bright
275.5Bright
285.5Bright
295.5Bright
305.5Bright
Planning a trip in September

Hazard calendar for Mananjary

In seasonPeak

None of Mananjary's seasonal hazards are active in September. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

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.

Cyclone
Rainy season
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is September a good time to visit Mananjary?

Our two travel scores rate September for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

7.2
Sightseeing
1st-best month of the year
6.4
Beach & pool
2nd-best month of the year

September is one of the better times to visit Mananjary for general sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Mananjary in September

From September's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In September, Mananjary sees daytime highs around 25°C and nights near 19°C. Worth packing: light clothes, rain gear and sun protection. About 10 days see rain.

light clothesrain gearsun protection

Sea temperature near Mananjary in September

The nearest coast averages about 24°C in September — 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.

22°24°26°28°30°JanFebMarAprMayJunJulAugSepOctNovDecrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan28Tropical
Feb28Tropical
Mar28Tropical
Apr28Warm
May27Warm
Jun26Warm
Jul25Warm
Aug24Warm
Sep24Warm
Oct25Warm
Nov26Warm
Dec27Warm

UV index in Mananjary in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 9 (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.

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highHighVery highExtremeFeb 12UV 16Jun 18UV 6
UV index (midday)Level
Jan14Extreme
Feb16Extreme
Mar13Extreme
Apr10Very high
May7Very high
Jun6High
Jul6High
Aug8Very high
Sep9Very high
Oct11Extreme
Nov12Extreme
Dec14Extreme

Air quality in Mananjary in September

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where September 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).

010203040JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodModerateOct 1834 µg/m³Feb 196 µg/m³
PM2.5 (µg/m³)Level
Jan8Good
Feb6Good
Mar7Good
Apr9Good
May13Moderate
Jun13Moderate
Jul12Good
Aug11Good
Sep14Moderate
Oct36Poor
Nov22Moderate
Dec10Good
Location & terrain

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.

AmboanjoManakaraIkongoFianarantsoaMarolambo

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.

3 km
41 m
16 km
86 m
80 km
1,258 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwaterwetland
September weather nearby: Sahavato 70 km · Ifanadiana 74 km · Nosy Varika 75 km · Amboanjo 100 km · Manakara 108 km · Ikongo 119 km · Fianarantsoa 132 km · Marolambo 133 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
Church of Jesus Christ in Madagascar/Malagasy Lutheran Church/Anglican Church 34%Roman Catholic 32%none 22%other Christian 8%

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. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).