Ambanja weather in September

In September, Ambanja sees average daytime highs of 28°C and overnight lows near 19°C, with 63 mm of rain across 16.6 wet days and about 11.9 hours of daylight. It is the 9th-warmest and 8th-wettest month of the year here.

Day-to-day highs hold fairly steady near 28°C through the month. The sky is clear or mostly clear about 56% of the time in September, and the air most often feels muggy.

Daylight stretches from about 11 h 42 min at the start of September to 12 h 06 min by month's end. Set against the rest of the year, September is Ambanja's 4th-clearest and 1st-windiest month. For the whole year in context, see Ambanja's year-round climate.

Daytime high
28°
9th warmest
Overnight low
19°
4th coldest
Rainfall
63 mm
16.6 wet days
Daylight
11 h 54 min
5:43 AM – 5:38 PM
Cloud cover
40%
4th clearest
Wind
5 km/h
1st windiest
Solar energy
6.03 kWh/m²
Travel score
5.1
out of 10

Ambanja is city and commune of Madagascar.

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 28°C through the month.

A typical September day in Ambanja reaches about 28°C in the afternoon and slips back to 19°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 27°C and 30°C. Set against its neighbours, September runs on par with August and on par with October.

15°20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
12819
22819
32819
42819
52819
62819
72819
82819
92819
102819
112819
122819
132819
142819
152819
162819
172919
182919
192919
202919
212919
222920
232920
242920
252920
262920
272920
282920
292920
302920

How September really feels in Ambanja

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.

Ambanja weather by month

How September compares with the rest of the year at a glance. September is the 9th-warmest and 8th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan29° / 22°52129.912.72.8
Feb29° / 22°44026.812.52.8
Mar30° / 22°35628.712.12.9
Apr30° / 21°14921.711.73.8
May29° / 20°5312.511.45.6
Jun28° / 19°329.611.26.7
Jul28° / 18°3811.111.36.6
Aug28° / 18°5315.211.56.0
Sep28° / 19°6316.611.95.1
Oct29° / 21°10219.912.34.5
Nov29° / 22°19024.612.63.6
Dec29° / 22°35229.612.82.9

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 56% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 32% of September, with mostly cloudy or overcast conditions the remaining 12%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
18515
28515
38515
48614
58614
68614
78614
88713
98713
108812
118812
128812
138911
148911
158911
168911
178911
188911
198911
208911
218911
228911
238911
248911
258911
268812
278812
288812
298812
308812

Chance of precipitation in September

Any precipitation

Ambanja gets around 63 mm of rain over 16.6 wet days in September. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 56% and peaks near 60% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
153
253
353
453
554
654
754
855
955
1055
1155
1255
1355
1455
1556
1656
1756
1856
1956
2056
2156
2257
2357
2457
2558
2659
2759
2859
2960
3060

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 68% of days. Sticky, muggy-or-worse air turns up on roughly 71% of them.

0%25%50%75%100%151015202530
Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1347491
2346501
3344521
4343531
5341560
6340570
7239590
8237610
9236620
10134641
11133651
12131671
13130681
14128701
15127702
16125722
17024742
18023752
19022753
20121753
21120754
22119764
23118765
24118765
25117766
26016777
27016777
28015778
29015769
300147610

Wind in September

Winds average 5 km/h in September, the windiest month of the year.

Across September, daily wind ranges from about 5 km/h on the calmest days to 5 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
15calm
25calm
35calm
45calm
55calm
65calm
75calm
85calm
95calm
105calm
115calm
125calm
135calm
145calm
155calm
165calm
175calm
185calm
195calm
205calm
215calm
225calm
235calm
245calm
255calm
265calm
275calm
285calm
295calm
305calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 11 h 42 min at the start of September to 12 h 06 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 24 minutes over September. Sunrise moves from 5:54 AM to 5:32 AM, and sunset from 5:38 PM to 5:39 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.75:545:38
211.75:535:38
311.85:525:38
411.85:525:38
511.85:515:38
611.85:505:38
711.85:505:38
811.85:495:38
911.85:485:38
1011.85:475:38
1111.95:475:38
1211.95:465:38
1311.95:455:38
1411.95:445:38
1511.95:445:38
1611.95:435:38
1711.95:425:38
1812.05:415:38
1912.05:405:38
2012.05:405:38
2112.05:395:38
2212.05:385:38
2312.05:375:38
2412.05:375:38
2512.05:365:38
2612.15:355:39
2712.15:345:39
2812.15:345:39
2912.15:335:39
3012.15:325:39

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 6.03 kWh/m².

For context, solar energy here swings from a low near 4.68 kWh/m² to a high of 6.37 kWh/m² in October across the year — September's 6.03 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
15.7Bright
25.8Bright
35.8Bright
45.8Bright
55.8Bright
65.8Bright
75.9Bright
85.9Bright
95.9Bright
105.9Bright
115.9Bright
126.0Bright
136.0Bright
146.0Intense
156.0Intense
166.0Intense
176.1Intense
186.1Intense
196.1Intense
206.1Intense
216.1Intense
226.2Intense
236.2Intense
246.2Intense
256.2Intense
266.2Intense
276.2Intense
286.2Intense
296.3Intense
306.3Intense
Planning a trip in September

Hazard calendar for Ambanja

In seasonPeak

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

Ambanja sits in the South Indian Ocean cyclone belt; the season peaks January–March.

Ambanja's monsoon runs December–March, when most of the year's rain falls.

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

Is September a good time to visit Ambanja?

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

5.1
Sightseeing
5th-best month of the year
6.1
Beach & pool
5th-best month of the year

September is a reasonable time to visit Ambanja for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Ambanja in September

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

In September, Ambanja sees daytime highs around 28°C and nights near 19°C. Pack light clothes, rain gear and sun protection. About 17 days see rain.

light clothesrain gearsun protection

Sea temperature near Ambanja in September

The nearest coast averages about 27°C in September — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea offshore is warmest in April at about 30°C and coldest in August near 27°C.

The water stays above 20°C all year — warm enough for a swim any month.

26°28°30°32°JanFebMarAprMayJunJulAugSepOctNovDecwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan29Tropical
Feb29Tropical
Mar30Tropical
Apr30Tropical
May29Tropical
Jun28Tropical
Jul27Warm
Aug27Warm
Sep27Warm
Oct28Warm
Nov28Tropical
Dec29Tropical

UV index in Ambanja in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 12 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Ambanja peaks around February 13 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 20 at about 8 (very high).

The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highExtremeFeb 13UV 15Jun 20UV 8
UV index (midday)Level
Jan15Extreme
Feb15Extreme
Mar14Extreme
Apr12Extreme
May10Extreme
Jun8Very high
Jul9Very high
Aug11Extreme
Sep12Extreme
Oct13Extreme
Nov13Extreme
Dec14Extreme

Air quality in Ambanja 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 Ambanja is worst in November — around 23 µg/m³ PM2.5 (moderate), about 4.1× the cleanest month (July, 6 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateNov 1223 µg/m³Jul 156 µg/m³
PM2.5 (µg/m³)Level
Jan8Good
Feb7Good
Mar7Good
Apr7Good
May6Good
Jun6Good
Jul6Good
Aug6Good
Sep12Good
Oct20Moderate
Nov23Moderate
Dec10Good
Location & terrain

Where is Ambanja?

Ambanja sits at 13.7°S, 48.5°E, 20 m above sea level, in Madagascar. The nearest listed city is Hell-Ville, 36 km away.

BealananaAntsohihyAndapa

Topography around Ambanja

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Ambanja.

Within 3 km, the terrain around Ambanja has only modest variations in elevation — a maximum elevation change of 168 m around an average of 19 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 552 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,861 m.

The land around Ambanja is covered by trees (44%) and grassland (37%) within 3 km, trees (45%) and grassland (27%) within 16 km, and trees (38%), water (37%) and grassland (20%) within 80 km.

3 km
168 m
16 km
552 m
80 km
2,861 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwaterwetlandmangroves
September weather nearby: Hell-Ville 36 km · Ambarakaraka 49 km · Maromandia 73 km · Antsohimbondrona 78 km · Ambilobe 83 km · Bealanana 102 km · Antsohihy 144 km · Andapa 169 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 Ambanja (-13.669°, 48.453°, elevation 20 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).