Mahanoro weather in September

In September, Mahanoro sees average daytime highs of 24°C and overnight lows near 19°C, with 59 mm of rain across 12 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 24°C through the month. The sky is clear or mostly clear about 58% 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 Mahanoro's 1st-clearest and 6th-windiest month. For the whole year in context, see Mahanoro's year-round climate.

Daytime high
24°
9th warmest
Overnight low
19°
3rd coldest
Rainfall
59 mm
12 wet days
Daylight
11 h 54 min
5:42 AM – 5:36 PM
Cloud cover
38%
1st clearest
Wind
10 km/h
6th windiest
Solar energy
5.41 kWh/m²
Travel score
7.0
out of 10

Mahanoro is place in Atsinanana, 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 24°C through the month.

A typical September day in Mahanoro 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 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
122419
132419
142419
152419
162419
172419
182420
192520
202520
212520
222520
232520
242520
252520
262520
272520
282520
292520
302520

How September really feels in Mahanoro

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.

Mahanoro 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° / 24°31524.613.13.7
Feb29° / 24°30923.312.73.6
Mar28° / 24°31925.112.14.0
Apr27° / 23°17520.511.65.0
May25° / 21°20019.811.15.5
Jun24° / 20°12117.810.85.9
Jul23° / 19°12319.310.95.6
Aug23° / 19°751511.36.5
Sep24° / 19°591211.97.0
Oct26° / 21°7912.212.56.6
Nov27° / 23°9112.212.96.2
Dec28° / 24°19018.713.24.7

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 58% of the time in September, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 25% of September, with mostly cloudy or overcast conditions the remaining 17%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
18416
28416
38416
48416
58416
68416
78317
88317
98218
108218
118218
128218
138119
148119
158119
168218
178218
188218
198317
208317
218317
228317
238416
248416
258416
268416
278416
288416
298317
308317

Chance of precipitation in September

Any precipitation

Mahanoro gets around 59 mm of rain over 12 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 40% and peaks near 47% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
147
247
347
447
546
646
745
845
944
1043
1142
1241
1340
1439
1539
1638
1737
1837
1936
2036
2135
2235
2335
2434
2534
2634
2734
2835
2935
3036

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 49% of days. Sticky, muggy-or-worse air turns up on roughly 50% of them.

0%25%50%75%100%151015202530
Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1661330
2660340
3659350
4658360
5657370
6656380
7655390
8654400
9653410
10653410
11652420
12651430
13649450
14648460
15647470
16646480
17544510
18543511
19542521
20440551
21439561
22438571
23337591
24335602
25334612
26233632
27232633
28231643
29230644
30229654

Wind in September

Winds average 10 km/h in September.

Across September, daily wind ranges from about 9 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
19calm
29calm
39calm
49calm
510calm
610calm
710calm
810calm
910calm
1010calm
1110calm
1210calm
1310calm
1410calm
1510calm
1610calm
1710calm
1810calm
1910calm
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 5:56 AM to 5:29 AM, and sunset from 5:33 PM to 5:39 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.65:565:33
211.65:565:33
311.65:555:33
411.75:545:33
511.75:535:33
611.75:525:34
711.75:515:34
811.75:505:34
911.85:495:34
1011.85:485:35
1111.85:475:35
1211.85:465:35
1311.85:455:35
1411.85:445:35
1511.95:435:36
1611.95:425:36
1711.95:425:36
1811.95:415:36
1911.95:405:36
2012.05:395:37
2112.05:385:37
2212.05:375:37
2312.05:365:37
2412.05:355:37
2512.15:345:38
2612.15:335:38
2712.15:325:38
2812.15:315:38
2912.15:305:39
3012.25:295:39

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.41 kWh/m².

For context, solar energy here swings from a low near 3.42 kWh/m² to a high of 6.65 kWh/m² in November across the year — September's 5.41 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
14.9Bright
24.9Bright
35.0Bright
45.0Bright
55.0Bright
65.1Bright
75.1Bright
85.1Bright
95.2Bright
105.2Bright
115.2Bright
125.3Bright
135.3Bright
145.3Bright
155.4Bright
165.4Bright
175.4Bright
185.5Bright
195.5Bright
205.5Bright
215.6Bright
225.6Bright
235.7Bright
245.7Bright
255.7Bright
265.7Bright
275.8Bright
285.8Bright
295.8Bright
305.8Bright
Planning a trip in September

Hazard calendar for Mahanoro

In seasonPeak

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

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

Mahanoro'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 Mahanoro?

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

7.0
Sightseeing
1st-best month of the year
6.0
Beach & pool
3rd-best month of the year

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

What to pack for Mahanoro in September

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

In September, Mahanoro sees daytime highs around 24°C and nights near 19°C. Worth packing: light clothes, rain gear and sun protection. About 12 days see rain.

light clothesrain gearsun protection

Sea temperature near Mahanoro 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
Jun26Warm
Jul25Warm
Aug24Warm
Sep24Warm
Oct25Warm
Nov26Warm
Dec28Warm

UV index in Mahanoro in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 10 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Mahanoro peaks around February 13 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 13UV 16Jun 18UV 6
UV index (midday)Level
Jan14Extreme
Feb16Extreme
Mar13Extreme
Apr10Very high
May8Very high
Jun6High
Jul7High
Aug8Very high
Sep10Extreme
Oct11Extreme
Nov12Extreme
Dec14Extreme

Air quality in Mahanoro 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 Mahanoro is worst in October — around 24 µg/m³ PM2.5 (moderate), about 4.1× the cleanest month (March, 6 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodOct 2023 µg/m³Mar 116 µg/m³
PM2.5 (µg/m³)Level
Jan7Good
Feb6Good
Mar6Good
Apr6Good
May8Good
Jun8Good
Jul7Good
Aug8Good
Sep8Good
Oct24Moderate
Nov18Moderate
Dec8Good
Location & terrain

Where is Mahanoro?

Mahanoro sits at 19.9°S, 48.8°E, 3 m above sea level, in Madagascar. The nearest listed city is Vatomandry, 66 km away.

SahavatoMoramangaAmpasimanolotraManjakandrianaFandriana

Topography around Mahanoro

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

Within 3 km, the terrain around Mahanoro has only modest variations in elevation — a maximum elevation change of 42 m around an average of 4 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 236 m; within 80 km, large variations in elevation — a maximum elevation change of 1,147 m.

The land around Mahanoro is covered by shrubs (28%), trees (27%) and water (23%) within 3 km, water (50%) and trees (32%) within 16 km, and water (35%) and trees (34%) within 80 km.

3 km
42 m
16 km
236 m
80 km
1,147 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwaterwetland
September weather nearby: Vatomandry 66 km · Marolambo 73 km · Nosy Varika 81 km · Sahavato 92 km · Moramanga 121 km · Ampasimanolotra 124 km · Manjakandriana 152 km · Fandriana 153 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 Mahanoro (-19.9°, 48.8°, elevation 3 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).