Koungou weather in September

In September, Koungou sees average daytime highs of 25°C and overnight lows near 24°C, with 12 mm of rain across 3.6 wet days and about 11.9 hours of daylight. It is the 10th-warmest and 9th-wettest month of the year here.

Day-to-day highs hold fairly steady near 25°C through the month. The sky is clear or mostly clear about 86% 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 Koungou's 2nd-clearest and 12th-windiest month. For the whole year in context, see Koungou's year-round climate.

Daytime high
25°
10th warmest
Overnight low
24°
2nd coldest
Rainfall
12 mm
3.6 wet days
Daylight
11 h 54 min
5:56 AM – 5:51 PM
Cloud cover
23%
2nd clearest
Wind
11 km/h
12th windiest
Solar energy
6.42 kWh/m²
Travel score
8.5
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 25°C through the month.

A typical September day in Koungou reaches about 25°C in the afternoon and slips back to 24°C overnight — a 1°C spread between the day's warmth and the night's chill. On most days the high lands between 25°C and 26°C. Set against its neighbours, September runs on par with August and about 1°C cooler than October.

20°23°25°28°30°151015202530
Avg high (°C)Avg low (°C)
12524
22524
32524
42524
52524
62524
72524
82524
92524
102524
112524
122524
132524
142524
152524
162524
172524
182524
192524
202524
212524
222524
232524
242524
252524
262524
272624
282624
292624
302624

Koungou weather by month

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

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan28° / 26°23821.712.74.5
Feb28° / 26°19619.812.44.5
Mar28° / 26°1692012.14.7
Apr28° / 27°691311.76.0
May27° / 26°215.811.47.6
Jun26° / 25°122.911.38.4
Jul25° / 24°102.511.38.7
Aug25° / 24°102.111.68.9
Sep25° / 24°123.611.98.5
Oct26° / 25°205.412.38.0
Nov27° / 26°40912.67.1
Dec27° / 26°10916.512.75.6

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 86% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 8% of September, with mostly cloudy or overcast conditions the remaining 6%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
1955
2955
3955
4955
5955
6946
7955
8955
9955
10955
11955
12955
13955
14955
15955
16946
17946
18946
19946
20946
21946
22937
23946
24946
25946
26946
27946
28946
29946
30946

Chance of precipitation in September

Any precipitation

Koungou gets around 12 mm of rain over 3.6 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 12% and peaks near 15% on the wettest days.

0%10%20%30%151015202530
Rain chance (%)
19
29
39
410
510
610
710
810
911
1011
1111
1211
1311
1411
1512
1612
1712
1812
1912
2012
2113
2213
2313
2414
2514
2614
2715
2815
2915
3015

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 75% of days. Sticky, muggy-or-worse air turns up on roughly 99% of them.

0%25%50%75%100%151015202530
Humid (%)Muggy (%)Oppressive (%)
148610
248511
338611
438512
538512
638413
738413
838314
928414
1028315
1128216
1218316
1318217
1418019
1517920
1617821
1717623
1817425
1917326
2017128
2116930
2216732
2306733
2406535
2506337
2606139
2705941
2805743
2905644
3005446

Wind in September

Winds average 11 km/h in September, the calmest month.

Across September, daily wind ranges from about 11 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
512light breeze
612light breeze
712light breeze
812light breeze
912calm
1012calm
1112calm
1212calm
1312calm
1411calm
1511calm
1611calm
1711calm
1811calm
1911calm
2011calm
2111calm
2211calm
2311calm
2411calm
2511calm
2611calm
2711calm
2811calm
2911calm
3011calm

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 6:06 AM to 5:45 AM, and sunset from 5:51 PM to 5:51 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.86:065:51
211.86:065:51
311.86:055:51
411.86:045:51
511.86:045:51
611.86:035:51
711.86:025:51
811.86:015:51
911.86:015:51
1011.96:005:51
1111.95:595:51
1211.95:595:51
1311.95:585:51
1411.95:575:51
1511.95:565:51
1611.95:565:51
1711.95:555:51
1812.05:545:51
1912.05:535:51
2012.05:535:51
2112.05:525:51
2212.05:515:51
2312.05:505:51
2412.05:505:51
2512.05:495:51
2612.15:485:51
2712.15:485:51
2812.15:475:51
2912.15:465:51
3012.15:455:51

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 6.42 kWh/m².

For context, solar energy here swings from a low near 4.91 kWh/m² to a high of 6.97 kWh/m² in November across the year — September's 6.42 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
16.1Intense
26.2Intense
36.2Intense
46.2Intense
56.2Intense
66.2Intense
76.3Intense
86.3Intense
96.3Intense
106.3Intense
116.3Intense
126.4Intense
136.4Intense
146.4Intense
156.4Intense
166.5Intense
176.5Intense
186.5Intense
196.5Intense
206.5Intense
216.5Intense
226.5Intense
236.6Intense
246.6Intense
256.6Intense
266.6Intense
276.6Intense
286.6Intense
296.7Intense
306.7Intense
Planning a trip in September

Hazard calendar for Koungou

In seasonPeak

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

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

Koungou'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 Koungou?

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

8.5
Sightseeing
3rd-best month of the year
7.8
Beach & pool
5th-best month of the year

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

What to pack for Koungou in September

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

In September, Koungou sees daytime highs around 25°C and nights near 24°C. Pack sun protection. Worth having: light clothes. About 4 days see rain.

sun protectionlight clothes

Sea temperature near Koungou 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 at the nearest coast (about 15 km away) is warmest in March at about 30°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
Mar30Tropical
Apr29Tropical
May29Tropical
Jun27Warm
Jul26Warm
Aug26Warm
Sep26Warm
Oct27Warm
Nov28Warm
Dec29Tropical

UV index in Koungou 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 Koungou peaks around February 13 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 20 at about 8 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highExtremeFeb 13UV 15Jun 20UV 8
UV index (midday)Level
Jan15Extreme
Feb15Extreme
Mar14Extreme
Apr12Extreme
May10Very high
Jun8Very high
Jul9Very high
Aug11Extreme
Sep12Extreme
Oct13Extreme
Nov12Extreme
Dec14Extreme
Location & terrain

Where is Koungou?

Koungou sits at 12.7°S, 45.2°E, 40 m above sea level, in Mayotte. The nearest listed city is Kaouéni, 5.0 km away.

KaouéniMamoudzouMtsapéré

Topography around Koungou

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

Within 3 km, the terrain around Koungou has significant variations in elevation — a maximum elevation change of 391 m around an average of 54 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 562 m; within 80 km, large variations in elevation — a maximum elevation change of 616 m.

The land around Koungou is covered by water (53%) and trees (40%) within 3 km, water (69%) and trees (28%) within 16 km, and water (96%) within 80 km.

3 km
391 m
16 km
562 m
80 km
616 m
treesgrasslandartificial surfaceswatermangroves
September weather nearby: Kaouéni 5.0 km · Mamoudzou 6.0 km · Mtsapéré 6.0 km · Dzaoudzi 8.0 km · Labattoir 10 km · Moutsamoudou 108 km · Fomboni 166 km · Moroni 241 km

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Koungou (-12.7336°, 45.2042°, elevation 40 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).