Amboasary weather in September

In September, Amboasary sees average daytime highs of 29°C and overnight lows near 17°C, with 12 mm of rain across 2.9 wet days and about 11.8 hours of daylight. It is the 8th-warmest and 11th-wettest month of the year here.

Highs climb over the month, from about 28°C in the first days to 30°C by the end. The sky is clear or mostly clear about 75% of the time in September, and the air most often feels comfortable.

Daylight stretches from about 11 h 30 min at the start of September to 12 h 12 min by month's end. Set against the rest of the year, September is Amboasary's 2nd-clearest and 6th-windiest month. For the whole year in context, see Amboasary's year-round climate.

Daytime high
29°
8th warmest
Overnight low
17°
4th coldest
Rainfall
12 mm
2.9 wet days
Daylight
11 h 54 min
5:53 AM – 5:44 PM
Cloud cover
24%
2nd clearest
Wind
11 km/h
6th windiest
Solar energy
5.75 kWh/m²
Travel score
7.0
out of 10

Amboasary is human settlement in Anosy Region, Madagascar.

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

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 28°C in the first days to 30°C by the end.

A typical September day in Amboasary reaches about 29°C in the afternoon and slips back to 17°C overnight — a 13°C spread between the day's warmth and the night's chill. On most days the high lands between 23°C and 33°C. Set against its neighbours, September runs about 2°C warmer than August and about 2°C cooler than October.

10°15°20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
12816
22816
32816
42816
52816
62816
72816
82916
92916
102916
112916
122916
132916
142916
152916
162916
172917
182917
192917
202917
213017
223017
233017
243017
253017
263017
273017
283018
293018
303018

How September really feels in Amboasary

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.

Amboasary weather by month

How September compares with the rest of the year at a glance. September is the 8th-warmest and 11th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan32° / 23°1241413.43.6
Feb32° / 23°10312.112.94.0
Mar31° / 22°6310.412.24.5
Apr30° / 20°367.411.45.8
May27° / 18°195.210.87.6
Jun26° / 16°133.510.58.4
Jul25° / 15°123.110.68.6
Aug27° / 15°112.711.18.3
Sep29° / 17°122.911.87.0
Oct31° / 19°215.112.65.5
Nov32° / 20°346.913.24.6
Dec32° / 22°7112.913.53.8

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 75% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 11% of September, with mostly cloudy or overcast conditions the remaining 14%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
19010
29010
39010
49010
59010
68911
78812
88812
98812
108812
118713
128713
138713
148713
158614
168614
178515
188515
198515
208416
218416
228416
238317
248317
258317
268218
278119
288218
298218
308218

Chance of precipitation in September

Any precipitation

Amboasary gets around 12 mm of rain over 2.9 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 10% and peaks near 11% on the wettest days.

0%10%20%30%151015202530
Rain chance (%)
19
29
39
49
59
610
710
810
910
1010
1110
1210
1310
1410
1510
1610
179
189
199
209
219
229
239
249
259
2610
2710
2810
2911
3011

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the comfortable band about 51% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
12457181
22457181
32358181
42358181
52258191
62258191
72258191
82257201
92257201
102256211
112257210
122157220
132156230
142154250
152053261
162051281
171951291
181850311
191749331
201648341
211646362
221545382
231444403
241343413
251242424
261141444
271040455
281039465
29938466
30937476

Wind in September

Winds average 11 km/h in September.

Across September, daily wind ranges from about 11 km/h on the calmest days to 11 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
111calm
211calm
311calm
411calm
511calm
611calm
711calm
811calm
911calm
1011calm
1111calm
1211calm
1311calm
1411calm
1511calm
1611calm
1711calm
1811calm
1911calm
2011calm
2111calm
2211calm
2311calm
2411calm
2511calm
2611calm
2711calm
2811calm
2911calm
3011calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 11 h 30 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 42 minutes over September. Sunrise moves from 6:10 AM to 5:38 AM, and sunset from 5:39 PM to 5:50 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.56:105:39
211.56:095:39
311.56:075:40
411.66:065:40
511.66:055:40
611.66:045:41
711.66:035:41
811.76:025:41
911.76:015:42
1011.76:005:42
1111.75:595:43
1211.85:585:43
1311.85:565:43
1411.85:555:44
1511.85:545:44
1611.95:535:44
1711.95:525:45
1811.95:515:45
1911.95:505:46
2012.05:495:46
2112.05:485:46
2212.05:465:47
2312.05:455:47
2412.15:445:48
2512.15:435:48
2612.15:425:48
2712.15:415:49
2812.25:405:49
2912.25:395:50
3012.25:385:50

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.75 kWh/m².

For context, solar energy here swings from a low near 3.51 kWh/m² to a high of 6.81 kWh/m² in November across the year — September's 5.75 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.2Bright
25.3Bright
35.3Bright
45.3Bright
55.4Bright
65.4Bright
75.5Bright
85.5Bright
95.5Bright
105.6Bright
115.6Bright
125.6Bright
135.7Bright
145.7Bright
155.7Bright
165.8Bright
175.8Bright
185.8Bright
195.9Bright
205.9Bright
215.9Bright
226.0Bright
236.0Bright
246.0Intense
256.0Intense
266.1Intense
276.1Intense
286.1Intense
296.1Intense
306.2Intense
Planning a trip in September

Hazard calendar for Amboasary

In seasonPeak

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

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

Amboasary's rainy season runs December–March, 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 Amboasary?

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

7.0
Sightseeing
5th-best month of the year
8.7
Beach & pool
1st-best month of the year

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

What to pack for Amboasary in September

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

In September, Amboasary sees daytime highs around 29°C and nights near 17°C. Pack light clothes. Worth having: sun protection.

light clothessun protection

Sea temperature near Amboasary in September

The nearest coast averages about 22°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 February at about 26°C and coldest in August near 22°C.

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

20°22°24°26°28°JanFebMarAprMayJunJulAugSepOctNovDecrefreshingwarmcomfortable to swim
Sea temperature (°C)Comfort
Jan26Warm
Feb26Warm
Mar26Warm
Apr25Warm
May24Warm
Jun23Refreshing
Jul22Refreshing
Aug22Refreshing
Sep22Refreshing
Oct23Refreshing
Nov24Warm
Dec25Warm

UV index in Amboasary in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 8 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Amboasary peaks around January 20 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 20 at about 5 (high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highHighVery highExtremeJan 20UV 14Jun 20UV 5
UV index (midday)Level
Jan14Extreme
Feb14Extreme
Mar12Extreme
Apr8Very high
May6High
Jun5Moderate
Jul5High
Aug7High
Sep8Very high
Oct10Very high
Nov12Extreme
Dec13Extreme
Location & terrain

Where is Amboasary?

Amboasary sits at 25.0°S, 46.4°E, 22 m above sea level, in Madagascar. The nearest listed city is Ambovombe, 34 km away.

JafaroTsiombeBelohaBekilyAmpanihyBetroka

Topography around Amboasary

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

Within 3 km, the terrain around Amboasary has only modest variations in elevation — a maximum elevation change of 75 m around an average of 32 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 540 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,959 m.

The land around Amboasary is covered by shrubs (38%) and cropland (27%) within 3 km, shrubs (36%), cropland (23%) and trees (22%) within 16 km, and water (27%), shrubs (21%) and grassland (21%) within 80 km.

3 km
75 m
16 km
540 m
80 km
1,959 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Ambovombe 34 km · Tôlanaro 60 km · Jafaro 88 km · Tsiombe 95 km · Beloha 135 km · Bekily 141 km · Ampanihy 169 km · Betroka 199 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 Amboasary (-25.0333°, 46.3833°, elevation 22 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. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).