Mahajanga weather in September

In September, Mahajanga sees average daytime highs of 30°C and overnight lows near 23°C, with 3 mm of rain across 0.6 wet days and about 11.9 hours of daylight. It is the 6th-warmest and 9th-wettest month of the year here.

Day-to-day highs hold fairly steady near 30°C through the month. The sky is clear or mostly clear about 87% of the time in September, and the air most often feels humid.

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 Mahajanga's 1st-clearest and 3rd-windiest month. For the whole year in context, see Mahajanga's year-round climate.

Daytime high
30°
6th warmest
Overnight low
23°
4th coldest
Rainfall
3 mm
0.6 wet days
Daylight
11 h 54 min
5:52 AM – 5:46 PM
Cloud cover
18%
1st clearest
Wind
13 km/h
3rd windiest
Solar energy
6.66 kWh/m²
Travel score
6.5
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 30°C through the month.

A typical September day in Mahajanga reaches about 30°C in the afternoon and slips back to 23°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 29°C and 31°C. Set against its neighbours, September runs on par with August and about 1°C cooler than October.

20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
13022
23022
33022
43022
53022
63022
73022
83022
93022
103022
113022
123022
133022
143022
153022
163023
173023
183023
193023
203123
213123
223123
233123
243123
253123
263123
273123
283123
293123
303123

How September really feels in Mahajanga

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.

Mahajanga weather by month

How September compares with the rest of the year at a glance. September is the 6th-warmest and 9th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan30° / 25°43128.512.83.0
Feb30° / 25°3112412.53.1
Mar31° / 26°1972112.13.5
Apr32° / 25°438.311.74.7
May31° / 24°61.111.36.0
Jun30° / 22°10.211.16.9
Jul29° / 21°10.211.27.3
Aug30° / 21°10.211.57.0
Sep30° / 23°30.611.96.5
Oct31° / 24°174.312.45.5
Nov31° / 25°8015.112.74.2
Dec30° / 25°2052412.93.4

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 87% of the time in September, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 8% of September, with mostly cloudy or overcast conditions the remaining 4%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
1964
2964
3964
4955
5955
6955
7955
8955
9955
10955
11955
12964
13964
14964
15964
16964
17964
18955
19955
20955
21955
22964
23964
24964
25964
26964
27964
28964
29964
30964

Chance of precipitation in September

Any precipitation

Mahajanga gets around 3 mm of rain over 0.6 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 2% and peaks near 4% on the wettest days.

0%10%20%30%151015202530
Rain chance (%)
11
21
31
41
51
62
72
82
92
102
112
122
132
142
152
162
172
182
192
202
212
223
233
243
253
263
274
284
294
304

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the humid band about 51% of days. Sticky, muggy-or-worse air turns up on roughly 35% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
112653191
212553201
312454201
412453211
512353221
612254221
712153232
812053242
911953252
1011853262
1101853272
1201753282
1301653292
1401553302
1501453312
1601451323
1701351333
1801250344
1901150354
2001050365
210949365
220849376
230848376
240748387
250747388
260647389
2706463810
2806453811
2906443911
3006433912

Wind in September

Winds average 13 km/h in September.

Across September, daily wind ranges from about 13 km/h on the calmest days to 13 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
113light breeze
213light breeze
313light breeze
413light breeze
513light breeze
613light breeze
713light breeze
813light breeze
913light breeze
1013light breeze
1113light breeze
1213light breeze
1313light breeze
1413light breeze
1513light breeze
1613light breeze
1713light breeze
1813light breeze
1913light breeze
2013light breeze
2113light breeze
2213light breeze
2313light breeze
2413light breeze
2513light breeze
2613light breeze
2713light breeze
2813light breeze
2913light breeze
3013light breeze

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 6:04 AM to 5:40 AM, and sunset from 5:45 PM to 5:48 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.76:045:45
211.76:035:45
311.76:025:45
411.76:015:45
511.76:015:46
611.86:005:46
711.85:595:46
811.85:585:46
911.85:575:46
1011.85:575:46
1111.85:565:46
1211.95:555:46
1311.95:545:46
1411.95:535:46
1511.95:525:46
1611.95:525:46
1711.95:515:47
1811.95:505:47
1912.05:495:47
2012.05:485:47
2112.05:485:47
2212.05:475:47
2312.05:465:47
2412.05:455:47
2512.05:445:47
2612.15:435:47
2712.15:435:47
2812.15:425:48
2912.15:415:48
3012.15:405:48

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 6.66 kWh/m².

For context, solar energy here swings from a low near 4.93 kWh/m² to a high of 7.13 kWh/m² in October across the year — September's 6.66 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
16.3Intense
26.3Intense
36.3Intense
46.3Intense
56.4Intense
66.4Intense
76.4Intense
86.5Intense
96.5Intense
106.5Intense
116.5Intense
126.6Intense
136.6Intense
146.6Intense
156.7Intense
166.7Intense
176.7Intense
186.7Intense
196.8Intense
206.8Intense
216.8Intense
226.8Intense
236.8Intense
246.9Intense
256.9Intense
266.9Intense
276.9Intense
286.9Intense
297.0Intense
307.0Intense
Planning a trip in September

Hazard calendar for Mahajanga

In seasonPeak

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

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

Mahajanga'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 Mahajanga?

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

6.5
Sightseeing
4th-best month of the year
9.0
Beach & pool
4th-best month of the year

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

What to pack for Mahajanga in September

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

In September, Mahajanga sees daytime highs around 30°C and nights near 23°C. Pack light clothes and sun protection.

light clothessun protection

Sea temperature near Mahajanga in September

The nearest coast averages about 26°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 March at about 30°C and coldest in August near 25°C.

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

24°26°28°30°32°JanFebMarAprMayJunJulAugSepOctNovDecrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan29Tropical
Feb29Tropical
Mar30Tropical
Apr30Tropical
May28Tropical
Jun27Warm
Jul26Warm
Aug25Warm
Sep26Warm
Oct27Warm
Nov29Tropical
Dec29Tropical

UV index in Mahajanga 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 Mahajanga peaks around February 14 at about 16 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 19 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 14UV 16Jun 19UV 7
UV index (midday)Level
Jan14Extreme
Feb16Extreme
Mar14Extreme
Apr11Extreme
May9Very high
Jun7Very high
Jul8Very high
Aug10Very high
Sep12Extreme
Oct13Extreme
Nov12Extreme
Dec14Extreme
Location & terrain

Where is Mahajanga?

Mahajanga sits at 15.7°S, 46.3°E, 20 m above sea level, in Madagascar. The nearest listed city is Marovoay, 56 km away.

Ambato BoenySitampikySoalalaBorizinyMaevatananaMampikonyTsaratanana

Topography around Mahajanga

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

Within 3 km, the terrain around Mahajanga has only modest variations in elevation — a maximum elevation change of 45 m around an average of 5 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 98 m; within 80 km, significant variations in elevation — a maximum elevation change of 310 m.

The land around Mahajanga is covered by water (52%) and artificial surfaces (24%) within 3 km, water (50%) and grassland (33%) within 16 km, and grassland (42%) and water (34%) within 80 km.

3 km
45 m
16 km
98 m
80 km
310 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwaterwetlandmangroves
September weather nearby: Marovoay 56 km · Ambato Boeny 94 km · Sitampiky 108 km · Soalala 115 km · Boriziny 146 km · Maevatanana 148 km · Mampikony 148 km · Tsaratanana 186 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 Mahajanga (-15.7167°, 46.3167°, 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. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).