Moutsamoudou weather in September

In September, Moutsamoudou sees average daytime highs of 28°C and overnight lows near 21°C, with 23 mm of rain across 7.8 wet days and about 11.9 hours of daylight. It is the 9th-warmest and 9th-wettest month of the year here.

Day-to-day highs hold fairly steady near 28°C through the month. The sky is clear or mostly clear about 51% of the time in September, and the air most often feels muggy.

Daylight stretches from about 11 h 48 min at the start of September to 12 h 06 min by month's end. Set against the rest of the year, September is Moutsamoudou's 4th-clearest and 10th-windiest month. For the whole year in context, see Moutsamoudou's year-round climate.

Daytime high
28°
9th warmest
Overnight low
21°
3rd coldest
Rainfall
23 mm
7.8 wet days
Daylight
11 h 54 min
5:59 AM – 5:55 PM
Cloud cover
42%
4th clearest
Wind
7 km/h
10th windiest
Solar energy
5.97 kWh/m²
Travel score
7.0
out of 10

Moutsamoudou is city in Anjouan, Comoros.

Density
877/km²
people per km²
Founded
1482

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 28°C through the month.

A typical September day in Moutsamoudou reaches about 28°C in the afternoon and slips back to 21°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between 26°C and 29°C. Set against its neighbours, September runs on par with August and about 1°C cooler than October.

15°20°25°30°151015202530
Avg high (°C)Avg low (°C)
12721
22721
32721
42721
52721
62721
72721
82721
92821
102821
112821
122821
132821
142821
152821
162821
172821
182821
192821
202821
212821
222822
232822
242822
252822
262822
272822
282822
292822
302822

How September really feels in Moutsamoudou

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.

Moutsamoudou weather by month

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

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan29° / 25°24924.512.63.5
Feb29° / 25°22622.912.43.5
Mar29° / 25°20526.512.13.4
Apr29° / 24°1032011.74.2
May28° / 24°3811.511.45.9
Jun27° / 22°207.411.37.1
Jul27° / 21°175.611.47.5
Aug27° / 21°175.511.67.5
Sep28° / 21°237.811.97.0
Oct29° / 23°4210.612.35.8
Nov29° / 24°7316.212.64.7
Dec29° / 24°17422.312.73.9

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 51% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 29% of September, with mostly cloudy or overcast conditions the remaining 21%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
18515
28515
38416
48416
58416
68317
78218
88218
98218
108119
118020
128020
137921
147921
157921
167921
177723
187723
197723
207723
217822
227723
237723
247723
257723
267624
277624
287624
297525
307525

Chance of precipitation in September

Any precipitation

Moutsamoudou gets around 23 mm of rain over 7.8 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 25% and peaks near 29% on the wettest days.

0%10%20%30%40%151015202530
Rain chance (%)
123
224
324
425
525
625
725
825
925
1025
1125
1224
1324
1424
1524
1624
1724
1824
1925
2025
2125
2226
2326
2426
2527
2627
2728
2828
2928
3029

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 67% of days. Sticky, muggy-or-worse air turns up on roughly 69% of them.

0%25%50%75%100%151015202530
Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1145531
2144541
3143551
4042571
5040591
6039601
7038611
8037621
9036631
10035641
11034651
12033661
13032671
14032671
15031681
16030682
17029692
18028702
19027712
20026722
21025723
22025723
23024733
24023734
25022744
26022744
27021745
28020755
29019756
30019756

Wind in September

Winds average 7 km/h in September.

Across September, daily wind ranges from about 7 km/h on the calmest days to 8 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
18calm
28calm
38calm
48calm
58calm
68calm
78calm
88calm
98calm
108calm
117calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 11 h 48 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 18 minutes over September. Sunrise moves from 6:09 AM to 5:49 AM, and sunset from 5:55 PM to 5:55 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.86:095:55
211.86:095:55
311.86:085:55
411.86:075:55
511.86:075:55
611.86:065:55
711.86:055:55
811.86:045:55
911.96:045:55
1011.96:035:55
1111.96:025:55
1211.96:025:55
1311.96:015:55
1411.96:005:55
1511.95:595:55
1611.95:595:55
1711.95:585:55
1812.05:575:55
1912.05:575:55
2012.05:565:55
2112.05:555:55
2212.05:545:55
2312.05:545:55
2412.05:535:55
2512.05:525:55
2612.05:525:55
2712.15:515:55
2812.15:505:55
2912.15:505:55
3012.15:495:55

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.97 kWh/m².

For context, solar energy here swings from a low near 4.67 kWh/m² to a high of 6.51 kWh/m² in November across the year — September's 5.97 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.7Bright
25.7Bright
35.8Bright
45.8Bright
55.8Bright
65.8Bright
75.8Bright
85.9Bright
95.9Bright
105.9Bright
115.9Bright
125.9Bright
136.0Bright
146.0Bright
156.0Bright
166.0Intense
176.0Intense
186.0Intense
196.0Intense
206.1Intense
216.1Intense
226.1Intense
236.1Intense
246.1Intense
256.1Intense
266.1Intense
276.2Intense
286.2Intense
296.2Intense
306.2Intense
Planning a trip in September

Hazard calendar for Moutsamoudou

In seasonPeak

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

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

Moutsamoudou'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 Moutsamoudou?

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

7.0
Sightseeing
4th-best month of the year
7.4
Beach & pool
3rd-best month of the year

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

What to pack for Moutsamoudou in September

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

In September, Moutsamoudou sees daytime highs around 28°C and nights near 21°C. Pack light clothes. Worth having: sun protection. About 8 days see rain.

light clothessun protection

Sea temperature near Moutsamoudou 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 29°C and coldest in August near 26°C.

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

24°26°28°30°JanFebMarAprMayJunJulAugSepOctNovDecwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan29Tropical
Feb29Tropical
Mar29Tropical
Apr29Tropical
May28Tropical
Jun27Warm
Jul26Warm
Aug26Warm
Sep26Warm
Oct27Warm
Nov28Warm
Dec29Tropical

UV index in Moutsamoudou in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 13 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Moutsamoudou peaks around January 21 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 20 at about 9 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highExtremeJan 21UV 15Jun 20UV 9
UV index (midday)Level
Jan15Extreme
Feb14Extreme
Mar14Extreme
Apr13Extreme
May10Very high
Jun9Very high
Jul9Very high
Aug11Extreme
Sep13Extreme
Oct13Extreme
Nov13Extreme
Dec13Extreme
Location & terrain

Where is Moutsamoudou?

Moutsamoudou sits at 12.2°S, 44.4°E, 61 m above sea level, in Comoros. The nearest listed city is Fomboni, 73 km away.

FomboniMoroni

Topography around Moutsamoudou

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

Within 3 km, the terrain around Moutsamoudou has large variations in elevation — a maximum elevation change of 672 m around an average of 125 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,576 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,506 m.

The land around Moutsamoudou is covered by water (46%) and trees (45%) within 3 km, water (59%) and trees (38%) within 16 km, and water (95%) within 80 km.

3 km
672 m
16 km
1,576 m
80 km
1,506 m
treesshrubsgrasslandartificial surfaceswater
September weather nearby: Fomboni 73 km · Koungou 108 km · Kaouéni 112 km · Mtsapéré 112 km · Mamoudzou 113 km · Dzaoudzi 116 km · Labattoir 117 km · Moroni 135 km

Comoros travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type C / E
220 V · 50 Hz
Prices
≈ 49% of US
price level, 2025
GDP per capita
$2,056
2025
Happiness
3.9 / 10
World Happiness, 2025
Road deaths
26.6
per 100k/yr, 2019
Income group
Lower middle
World Bank
Religion
Muslim 98%ethnic religionist 1%Christian 1%other 0%

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 Moutsamoudou (-12.1667°, 44.3994°, elevation 61 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).