Antananarivo weather in September

In September, Antananarivo sees average daytime highs of 23°C and overnight lows near 11°C, with 5 mm of rain across 1.1 wet days and about 11.9 hours of daylight. It is the 8th-warmest and 9th-wettest month of the year here.

Highs climb over the month, from about 22°C in the first days to 24°C by the end. The sky is clear or mostly clear about 53% of the time in September, and the air most often feels dry.

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 Antananarivo's 1st-clearest and 4th-windiest month. For the whole year in context, see Antananarivo's year-round climate.

Daytime high
23°
8th warmest
Overnight low
11°
4th coldest
Rainfall
5 mm
1.1 wet days
Daylight
11 h 54 min
5:47 AM – 5:41 PM
Cloud cover
38%
1st clearest
Wind
12 km/h
4th windiest
Solar energy
5.92 kWh/m²
Travel score
8.6
out of 10

Antananarivo is capital and largest city of Madagascar.

Air quality
High
PM2.5 32 µg/m³ · 2020
Founded
1625

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 22°C in the first days to 24°C by the end.

A typical September day in Antananarivo reaches about 23°C in the afternoon and slips back to 11°C overnight — a 12°C spread between the day's warmth and the night's chill. On most days the high lands between 20°C and 26°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°151015202530
Avg high (°C)Avg low (°C)
12210
22211
32211
42211
52211
62211
72211
82211
92211
102311
112311
122311
132311
142311
152311
162311
172311
182411
192411
202411
212411
222412
232412
242412
252412
262412
272412
282412
292412
302512

Antananarivo weather by month

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

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan26° / 17°28722.1134.7
Feb25° / 17°2482012.64.8
Mar25° / 17°14315.412.15.8
Apr24° / 15°32711.67.5
May23° / 13°122.411.18.1
Jun20° / 11°40.710.97.8
Jul19° / 10°51117.6
Aug21° / 10°30.711.48.1
Sep23° / 11°51.111.98.6
Oct25° / 13°274.812.47.9
Nov27° / 15°7910.312.96.6
Dec26° / 17°18117.513.15.3

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 53% of the time in September, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 20% of September, with mostly cloudy or overcast conditions the remaining 27%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
16733
26733
36832
46832
56832
66931
77030
87030
97030
107030
117228
127228
137228
147327
157327
167327
177426
187426
197426
207525
217525
227525
237624
247624
257723
267723
277723
287723
297822
307822

Chance of precipitation in September

Any precipitation

Antananarivo gets around 5 mm of rain over 1.1 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 4% and peaks near 7% on the wettest days.

0%10%20%30%151015202530
Rain chance (%)
12
22
32
42
53
63
73
83
93
103
113
123
133
144
154
164
174
184
194
204
215
225
235
245
256
266
276
287
297
307

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the dry band about 93% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)
19820
29820
39730
49730
59730
69640
79640
89640
99640
109550
119550
129460
139460
149370
159370
169280
179280
189280
199280
209190
219190
229190
2390100
2490100
2590100
2689110
2789110
2888120
2986131
3086131

Wind in September

Winds average 12 km/h in September.

Across September, daily wind ranges from about 11 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
112light breeze
212light breeze
312light breeze
412light breeze
512light breeze
612light breeze
712light breeze
812light breeze
912calm
1012calm
1112calm
1212calm
1312calm
1412calm
1512calm
1612calm
1712calm
1812calm
1912calm
2011calm
2111calm
2211calm
2311calm
2411calm
2511calm
2611calm
2711calm
2811calm
2911calm
3011calm

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 6:01 AM to 5:35 AM, and sunset from 5:38 PM to 5:44 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.66:015:38
211.66:005:38
311.75:595:39
411.75:585:39
511.75:575:39
611.75:565:39
711.75:565:39
811.75:555:40
911.85:545:40
1011.85:535:40
1111.85:525:40
1211.85:515:40
1311.85:505:40
1411.95:495:41
1511.95:485:41
1611.95:475:41
1711.95:465:41
1811.95:465:41
1911.95:455:42
2012.05:445:42
2112.05:435:42
2212.05:425:42
2312.05:415:42
2412.05:405:42
2512.15:395:43
2612.15:385:43
2712.15:375:43
2812.15:365:43
2912.15:355:44
3012.25:355:44

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.92 kWh/m².

For context, solar energy here swings from a low near 3.8 kWh/m² to a high of 6.7 kWh/m² in November across the year — September's 5.92 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.3Bright
25.3Bright
35.4Bright
45.4Bright
55.5Bright
65.5Bright
75.6Bright
85.6Bright
95.7Bright
105.7Bright
115.8Bright
125.8Bright
135.8Bright
145.9Bright
155.9Bright
166.0Bright
176.0Intense
186.0Intense
196.1Intense
206.1Intense
216.1Intense
226.2Intense
236.2Intense
246.2Intense
256.3Intense
266.3Intense
276.3Intense
286.3Intense
296.4Intense
306.4Intense
Planning a trip in September

Hazard calendar for Antananarivo

In seasonPeak

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

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

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

Is September a good time to visit Antananarivo?

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

8.6
Sightseeing
1st-best month of the year
6.7
Beach & pool
2nd-best month of the year

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

What to pack for Antananarivo in September

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

In September, Antananarivo sees daytime highs around 23°C and nights near 11°C. Worth packing: light clothes and sun protection.

light clothessun protection

UV index in Antananarivo 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 Antananarivo peaks around February 11 at about 16 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 17 at about 7 (high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highVery highExtremeFeb 11UV 16Jun 17UV 7
UV index (midday)Level
Jan16Extreme
Feb16Extreme
Mar14Extreme
Apr11Extreme
May9Very high
Jun7High
Jul8Very high
Aug10Very high
Sep12Extreme
Oct13Extreme
Nov13Extreme
Dec15Extreme

Air quality in Antananarivo 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 Antananarivo is worst in October — around 49 µg/m³ PM2.5 (poor), about 3.7× the cleanest month (January, 13 µg/m³).

Seasonal pattern from CAMS reanalysis, scaled to Antananarivo's WHO annual average of 32 µg/m³.

0204060JanFebMarAprMayJunJulAugSepOctNovDecModeratePoorPoorModerateOct 1747 µg/m³Jan 1514 µg/m³
PM2.5 (µg/m³)Level
Jan13Moderate
Feb18Moderate
Mar23Moderate
Apr30Moderate
May43Poor
Jun45Poor
Jul43Poor
Aug38Poor
Sep31Moderate
Oct49Poor
Nov34Moderate
Dec17Moderate
Location & terrain

Where is Antananarivo?

Antananarivo sits at 18.9°S, 47.5°E, 1,274 m above sea level, in Madagascar. The nearest listed city is Ivato, 14 km away.

Topography around Antananarivo

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

Within 3 km, the terrain around Antananarivo has only modest variations in elevation — a maximum elevation change of 181 m around an average of 1,278 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 366 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,018 m.

The land around Antananarivo is covered by artificial surfaces (76%) within 3 km, cropland (47%) and grassland (32%) within 16 km, and grassland (62%) and cropland (21%) within 80 km.

3 km
181 m
16 km
366 m
80 km
2,018 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Ivato 14 km · Ambohidratrimo 15 km · Alarobia 22 km · Imerintsiatosika 24 km · Manjakandriana 28 km · Ambohitrolomahitsy 28 km · Ankazondandy 35 km · Sadabe 36 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 Antananarivo (-18.9137°, 47.5361°, elevation 1,274 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. 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).