Soanierana Ivongo weather in September

In September, Soanierana Ivongo sees average daytime highs of 24°C and overnight lows near 19°C, with 144 mm of rain across 22.2 wet days and about 11.9 hours of daylight. It is the 9th-warmest and 10th-wettest month of the year here.

Day-to-day highs hold fairly steady near 24°C through the month. The sky is clear or mostly clear about 25% 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 Soanierana Ivongo's 2nd-clearest and 7th-windiest month. For the whole year in context, see Soanierana Ivongo's year-round climate.

Daytime high
24°
9th warmest
Overnight low
19°
3rd coldest
Rainfall
144 mm
22.2 wet days
Daylight
11 h 54 min
5:39 AM – 5:33 PM
Cloud cover
54%
2nd clearest
Wind
9 km/h
7th windiest
Solar energy
4.78 kWh/m²
Travel score
5.1
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 24°C through the month.

A typical September day in Soanierana Ivongo reaches about 24°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 25°C. Set against its neighbours, September runs about 1°C warmer than August and about 2°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
122419
132419
142419
152419
162419
172419
182419
192419
202419
212419
222419
232419
242419
252519
262519
272519
282519
292520
302520

How September really feels in Soanierana Ivongo

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.

Soanierana Ivongo weather by month

How September compares with the rest of the year at a glance. September is the 9th-warmest and 10th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan29° / 24°36827.512.93.1
Feb29° / 24°37624.212.63.2
Mar29° / 24°38327.712.13.4
Apr27° / 23°25825.811.64.1
May26° / 21°24924.511.24.6
Jun24° / 20°24426.1114.4
Jul23° / 19°2782711.14.3
Aug23° / 19°20024.911.44.7
Sep24° / 19°14422.211.95.1
Oct26° / 20°12820.512.45.3
Nov27° / 22°12619.812.85.0
Dec29° / 23°22424.9133.8

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 25% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 35% of September, with mostly cloudy or overcast conditions the remaining 40%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15644
25644
35644
45743
55743
65842
75941
85842
95941
105941
115941
126040
136040
146040
156040
166040
176040
186040
196139
206139
216238
226238
236337
246337
256337
266535
276535
286535
296535
306535

Chance of precipitation in September

Any precipitation

Soanierana Ivongo gets around 144 mm of rain over 22.2 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 74% and peaks near 81% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%80%151015202530
Rain chance (%)
181
280
380
480
579
679
778
877
977
1076
1175
1275
1374
1473
1573
1672
1772
1871
1970
2070
2170
2270
2370
2470
2571
2671
2771
2871
2971
3071

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 69% of days. Sticky, muggy-or-worse air turns up on roughly 71% of them.

0%25%50%75%100%151015202530
Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1139600
2138610
3137620
4136630
5135640
6135640
7134650
8134650
9134650
10134650
11133660
12133660
13132670
14132670
15131671
16130681
17129691
18128701
19127711
20126712
21125722
22124732
23123733
24121753
25120754
26019765
27018766
28017767
29016768
30016759

Wind in September

Winds average 9 km/h in September.

Across September, daily wind ranges from about 9 km/h on the calmest days to 10 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
1210calm
1310calm
1410calm
1510calm
169calm
179calm
189calm
199calm
209calm
219calm
229calm
239calm
249calm
259calm
269calm
279calm
289calm
299calm
309calm

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 5:51 AM to 5:27 AM, and sunset from 5:31 PM to 5:35 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.75:515:31
211.75:515:31
311.75:505:32
411.75:495:32
511.75:485:32
611.75:475:32
711.85:465:32
811.85:465:32
911.85:455:32
1011.85:445:32
1111.85:435:33
1211.85:425:33
1311.95:415:33
1411.95:415:33
1511.95:405:33
1611.95:395:33
1711.95:385:33
1811.95:375:33
1912.05:365:34
2012.05:355:34
2112.05:355:34
2212.05:345:34
2312.05:335:34
2412.05:325:34
2512.15:315:34
2612.15:305:34
2712.15:295:35
2812.15:295:35
2912.15:285:35
3012.15:275:35

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.78 kWh/m².

For context, solar energy here swings from a low near 3.27 kWh/m² to a high of 6.03 kWh/m² in November across the year — September's 4.78 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
14.4Bright
24.4Bright
34.4Bright
44.5Bright
54.5Bright
64.5Bright
74.5Bright
84.6Bright
94.6Bright
104.6Bright
114.6Bright
124.7Bright
134.7Bright
144.7Bright
154.8Bright
164.8Bright
174.8Bright
184.8Bright
194.9Bright
204.9Bright
214.9Bright
225.0Bright
235.0Bright
245.0Bright
255.1Bright
265.1Bright
275.1Bright
285.1Bright
295.2Bright
305.2Bright
Planning a trip in September

Hazard calendar for Soanierana Ivongo

In seasonPeak

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

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

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

Is September a good time to visit Soanierana Ivongo?

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

5.1
Sightseeing
2nd-best month of the year
4.3
Beach & pool
4th-best month of the year

September is a reasonable time to visit Soanierana Ivongo for sightseeing.

What to pack for Soanierana Ivongo in September

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

In September, Soanierana Ivongo sees daytime highs around 24°C and nights near 19°C. Pack rain gear. Worth having: light clothes and sun protection. About 22 days see rain.

rain gearlight clothessun protection

Sea temperature near Soanierana Ivongo 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 offshore is warmest in February at about 29°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
Feb29Tropical
Mar28Tropical
Apr28Warm
May27Warm
Jun25Warm
Jul24Warm
Aug24Refreshing
Sep24Warm
Oct26Warm
Nov27Warm
Dec28Warm

UV index in Soanierana Ivongo in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 11 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Soanierana Ivongo peaks around February 11 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 20 at about 7 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highExtremeFeb 11UV 15Jun 20UV 7
UV index (midday)Level
Jan15Extreme
Feb15Extreme
Mar14Extreme
Apr11Extreme
May9Very high
Jun7High
Jul8Very high
Aug10Very high
Sep11Extreme
Oct13Extreme
Nov13Extreme
Dec14Extreme

Air quality in Soanierana Ivongo 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 Soanierana Ivongo is worst in November — around 27 µg/m³ PM2.5 (moderate), about 4.5× the cleanest month (February, 6 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateNov 1625 µg/m³Feb 146 µg/m³
PM2.5 (µg/m³)Level
Jan6Good
Feb6Good
Mar6Good
Apr6Good
May7Good
Jun7Good
Jul7Good
Aug6Good
Sep6Good
Oct11Good
Nov27Moderate
Dec9Good
Location & terrain

Where is Soanierana Ivongo?

Soanierana Ivongo sits at 16.9°S, 49.6°E, 117 m above sea level, in Madagascar. The nearest listed city is Ambodifotatra, 29 km away.

MananaraAndilamenaImerimandroso

Topography around Soanierana Ivongo

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

Within 3 km, the terrain around Soanierana Ivongo has only modest variations in elevation — a maximum elevation change of 105 m around an average of 8 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 433 m; within 80 km, large variations in elevation — a maximum elevation change of 1,196 m.

The land around Soanierana Ivongo is covered by water (34%) and trees (24%) within 3 km, water (39%) and trees (21%) within 16 km, and trees (45%) and water (40%) within 80 km.

3 km
105 m
16 km
433 m
80 km
1,196 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwaterwetland
September weather nearby: Ambodifotatra 29 km · Fenoarivo Atsinanana 55 km · Ambodimanga II 59 km · Vavatenina 73 km · Vohibinany 76 km · Mananara 85 km · Andilamena 108 km · Imerimandroso 121 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 Soanierana Ivongo (-16.9167°, 49.5833°, elevation 117 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).