Toamasina weather in September

In September, Toamasina sees average daytime highs of 23°C and overnight lows near 22°C, with 76 mm of rain across 17.7 wet days and about 11.9 hours of daylight. It is the 10th-warmest and 12th-wettest month of the year here.

Day-to-day highs hold fairly steady near 23°C through the month. The sky is clear or mostly clear about 62% 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 06 min by month's end. Set against the rest of the year, September is Toamasina's 1st-clearest and 11th-windiest month. For the whole year in context, see Toamasina's year-round climate.

Daytime high
23°
10th warmest
Overnight low
22°
3rd coldest
Rainfall
76 mm
17.7 wet days
Daylight
11 h 54 min
5:40 AM – 5:34 PM
Cloud cover
35%
1st clearest
Wind
15 km/h
11th windiest
Solar energy
5.13 kWh/m²
Travel score
6.1
out of 10

Toamasina is port city in eastern Madagascar.

Density
17,255/km²
people per km²

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 23°C through the month.

A typical September day in Toamasina reaches about 23°C in the afternoon and slips back to 22°C overnight — a 2°C spread between the day's warmth and the night's chill. On most days the high lands between 22°C and 24°C. Set against its neighbours, September runs on par with August and about 1°C cooler than October.

18°20°22°24°26°151015202530
Avg high (°C)Avg low (°C)
12321
22321
32321
42321
52321
62321
72321
82321
92321
102322
112322
122322
132322
142322
152322
162322
172322
182322
192322
202322
212422
222422
232422
242422
252422
262422
272422
282422
292422
302422

Toamasina weather by month

How September compares with the rest of the year at a glance. September is the 10th-warmest and 12th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan27° / 26°30525134.2
Feb27° / 26°3202312.64.2
Mar27° / 25°34626.212.14.2
Apr26° / 25°20024.211.64.6
May25° / 24°20123.511.25.0
Jun24° / 22°17424.210.94.9
Jul23° / 21°18024.3114.9
Aug23° / 21°11220.811.45.5
Sep23° / 22°7617.711.96.1
Oct24° / 23°771712.46.3
Nov26° / 24°7916.112.96.1
Dec27° / 25°1862213.14.9

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 62% of the time in September, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 26% of September, with mostly cloudy or overcast conditions the remaining 12%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
18713
28713
38713
48713
58713
68713
78614
88614
98614
108614
118614
128614
138614
148614
158713
168713
178713
188812
198812
208812
218911
228911
239010
249010
25919
26919
27919
28919
299010
309010

Chance of precipitation in September

Any precipitation

Toamasina gets around 76 mm of rain over 17.7 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 59% and peaks near 69% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%80%151015202530
Rain chance (%)
169
269
368
468
567
666
765
864
962
1061
1159
1258
1357
1456
1555
1654
1753
1853
1953
2053
2153
2254
2354
2455
2556
2657
2757
2858
2958
3059

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 52% of days. Sticky, muggy-or-worse air turns up on roughly 53% of them.

0%25%50%75%100%151015202530
Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1848430
2848430
3848440
4847450
5847450
6846460
7846460
8845460
9844470
10844470
11843480
12843490
13842490
14842501
15741511
16740521
17740521
18639541
19638551
20637561
21537571
22536581
23535582
24534592
25433612
26432613
27432613
28431614
29431605
30430615

Wind in September

Winds average 15 km/h in September.

Across September, daily wind ranges from about 14 km/h on the calmest days to 16 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202530
Wind speed (km/h)Feels
116light breeze
216light breeze
316light breeze
416light breeze
516light breeze
616light breeze
716light breeze
816light breeze
915light breeze
1015light breeze
1115light breeze
1215light breeze
1315light breeze
1415light breeze
1515light breeze
1615light breeze
1715light breeze
1815light breeze
1915light breeze
2014light breeze
2114light breeze
2214light breeze
2314light breeze
2414light breeze
2514light breeze
2614light breeze
2714light breeze
2814light breeze
2914light breeze
3014light breeze

Sunrise & sunset in September

DaylightNight

Daylight runs from about 11 h 36 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 30 minutes over September. Sunrise moves from 5:53 AM to 5:27 AM, and sunset from 5:31 PM to 5:36 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.65:535:31
211.75:525:31
311.75:515:32
411.75:505:32
511.75:505:32
611.75:495:32
711.75:485:32
811.85:475:32
911.85:465:33
1011.85:455:33
1111.85:445:33
1211.85:435:33
1311.85:425:33
1411.95:425:33
1511.95:415:34
1611.95:405:34
1711.95:395:34
1811.95:385:34
1912.05:375:34
2012.05:365:34
2112.05:355:34
2212.05:345:35
2312.05:335:35
2412.05:335:35
2512.15:325:35
2612.15:315:35
2712.15:305:35
2812.15:295:36
2912.15:285:36
3012.15:275:36

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.13 kWh/m².

For context, solar energy here swings from a low near 3.43 kWh/m² to a high of 6.35 kWh/m² in November across the year — September's 5.13 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
14.7Bright
24.7Bright
34.8Bright
44.8Bright
54.8Bright
64.8Bright
74.9Bright
84.9Bright
94.9Bright
105.0Bright
115.0Bright
125.0Bright
135.0Bright
145.1Bright
155.1Bright
165.1Bright
175.2Bright
185.2Bright
195.2Bright
205.3Bright
215.3Bright
225.3Bright
235.3Bright
245.4Bright
255.4Bright
265.4Bright
275.5Bright
285.5Bright
295.5Bright
305.5Bright
Planning a trip in September

Hazard calendar for Toamasina

In seasonPeak

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

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

Toamasina's rainy season runs December–July, 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 Toamasina?

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

6.1
Sightseeing
2nd-best month of the year
4.8
Beach & pool
4th-best month of the year

September is a reasonable time to visit Toamasina for sightseeing.

What to pack for Toamasina in September

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

In September, Toamasina sees daytime highs around 23°C and nights near 22°C. Pack rain gear. Worth having: light clothes and sun protection. About 18 days see rain.

rain gearlight clothessun protection

Sea temperature near Toamasina 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 at the nearest coast (about 24 km away) 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
Apr28Tropical
May27Warm
Jun26Warm
Jul25Warm
Aug24Warm
Sep24Warm
Oct25Warm
Nov26Warm
Dec28Warm

UV index in Toamasina 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 Toamasina peaks around February 13 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 19 at about 7 (high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highHighVery highExtremeFeb 13UV 15Jun 19UV 7
UV index (midday)Level
Jan14Extreme
Feb16Extreme
Mar13Extreme
Apr11Extreme
May8Very high
Jun7High
Jul7Very high
Aug9Very high
Sep11Extreme
Oct13Extreme
Nov12Extreme
Dec14Extreme
Location & terrain

Where is Toamasina?

Toamasina sits at 18.1°S, 49.4°E, 12 m above sea level, in Madagascar. The nearest listed city is Vavatenina, 79 km away.

Fenoarivo AtsinananaDidyVohibinanyAmbodimanga IIAmbatondrazakaImerimandroso

Topography around Toamasina

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

Within 3 km, the terrain around Toamasina has only modest variations in elevation — a maximum elevation change of 15 m around an average of 5 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 201 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,456 m.

The land around Toamasina is covered by artificial surfaces (47%) and water (25%) within 3 km, water (54%) and trees (29%) within 16 km, and trees (49%) and water (37%) within 80 km.

3 km
15 m
16 km
201 m
80 km
1,456 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Vavatenina 79 km · Ampasimanolotra 82 km · Fenoarivo Atsinanana 85 km · Didy 92 km · Vohibinany 97 km · Ambodimanga II 101 km · Ambatondrazaka 110 km · Imerimandroso 118 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 Toamasina (-18.1492°, 49.4023°, elevation 12 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).