Bianouan weather in September

In September, Bianouan sees average daytime highs of 29°C and overnight lows near 22°C, with 147 mm of rain across 26 wet days and about 12 hours of daylight. It is the 10th-warmest and 4th-wettest month of the year here.

Day-to-day highs hold fairly steady near 29°C through the month. The sky is clear or mostly clear about 0% of the time in September, and the air most often feels oppressive.

Daylight stretches from about 12 h 06 min at the start of September to 12 hours by month's end. Set against the rest of the year, September is Bianouan's 8th-clearest and 4th-windiest month. For the whole year in context, see Bianouan's year-round climate.

Daytime high
29°
10th warmest
Overnight low
22°
5th coldest
Rainfall
147 mm
26 wet days
Daylight
12 hours
6:06 AM – 6:08 PM
Cloud cover
80%
8th clearest
Wind
7 km/h
4th windiest
Solar energy
3.97 kWh/m²
Travel score
3.3
out of 10

Bianouan is town and sub-prefecture in Comoé, Ivory Coast.

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 29°C through the month.

A typical September day in Bianouan reaches about 29°C in the afternoon and slips back to 22°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 27°C and 31°C. Set against its neighbours, September runs about 1°C warmer than August and about 1°C cooler than October.

20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
12922
22922
32922
42922
52922
62922
72922
82922
92922
102922
112922
122922
132922
142922
152923
162923
172923
182923
192923
202923
212923
222923
232923
242923
252923
262923
272923
282923
292923
302923

How September really feels in Bianouan

Once humidity and wind are folded in, September averages 21 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
21
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

The story in September is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Bianouan weather by month

How September compares with the rest of the year at a glance. September is the 10th-warmest and 4th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan32° / 22°378.611.74.1
Feb33° / 24°6814.711.83.0
Mar32° / 24°13123.7122.5
Apr32° / 23°13823.512.12.7
May31° / 23°17427.312.32.7
Jun29° / 23°18627.412.33.1
Jul28° / 22°13924.112.33.9
Aug28° / 22°9821.112.24.3
Sep29° / 22°14726123.3
Oct30° / 23°17927.611.92.9
Nov31° / 23°10521.211.73.3
Dec31° / 22°4811.911.74.4

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 0% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 10% of September, with mostly cloudy or overcast conditions the remaining 90%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
1694
2694
3793
4793
5793
6892
7892
8892
9991
10991
11991
121090
131090
141090
151090
161090
171189
181189
191189
201189
211189
221189
231288
241288
251288
261486
271486
281585
291585
301585

Chance of precipitation in September

Any precipitation

Bianouan gets around 147 mm of rain over 26 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 86% and peaks near 91% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%100%151015202530
Rain chance (%)
181
282
382
483
583
684
784
884
984
1084
1185
1285
1385
1485
1585
1686
1786
1886
1987
2087
2188
2288
2389
2489
2590
2690
2790
2891
2991
3091

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the oppressive band about 97% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202530
Muggy (%)Oppressive (%)
1595
2496
3496
4496
5496
6496
7496
8496
9496
10496
11397
12397
13397
14397
15397
16397
17397
18298
19298
20298
21298
22298
23298
24199
25199
26199
27199
28199
29199
30199

Wind in September

Winds average 7 km/h in September.

Across September, daily wind ranges from about 6 km/h on the calmest days to 8 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
18calm
28calm
38calm
48calm
58calm
68calm
78calm
88calm
98calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
296calm
306calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 06 min at the start of September to 12 hours by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 6 minutes over September. Sunrise moves from 6:09 AM to 6:03 AM, and sunset from 6:16 PM to 6:01 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.16:096:16
212.16:096:15
312.16:096:15
412.16:086:14
512.16:086:14
612.16:086:13
712.16:086:13
812.16:086:12
912.16:086:12
1012.16:076:11
1112.16:076:11
1212.16:076:10
1312.06:076:10
1412.06:076:09
1512.06:066:09
1612.06:066:08
1712.06:066:08
1812.06:066:07
1912.06:066:06
2012.06:056:06
2112.06:056:05
2212.06:056:05
2312.06:056:04
2412.06:056:04
2512.06:046:03
2612.06:046:03
2712.06:046:02
2812.06:046:02
2912.06:046:01
3012.06:036:01

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 3.97 kWh/m².

For context, solar energy here swings from a low near 3.71 kWh/m² to a high of 4.99 kWh/m² in January across the year — September's 3.97 kWh/m² falls in the middle.

012345151015202530
Solar energy (kWh/m²)Level
13.8Moderate
23.9Moderate
33.9Moderate
43.9Moderate
53.9Moderate
63.9Moderate
73.9Moderate
83.9Moderate
93.9Moderate
103.9Moderate
113.9Moderate
123.9Moderate
133.9Moderate
144.0Moderate
154.0Moderate
164.0Moderate
174.0Moderate
184.0Bright
194.0Bright
204.0Bright
214.0Bright
224.0Bright
234.1Bright
244.1Bright
254.1Bright
264.1Bright
274.1Bright
284.1Bright
294.1Bright
304.2Bright
Planning a trip in September

Hazard calendar for Bianouan

In seasonPeak

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

Bianouan sees seasonal dust haze (January–April), heaviest in February.

Dust
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is September a good time to visit Bianouan?

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

3.3
Sightseeing
5th-best month of the year
4.2
Beach & pool
8th-best month of the year

September is a weaker month for outdoor sightseeing in Bianouan.

What to pack for Bianouan in September

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

In September, Bianouan sees daytime highs around 29°C and nights near 22°C. Pack light clothes and rain gear. About 26 days see rain.

light clothesrain gear

UV index in Bianouan 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 Bianouan peaks around April 12 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 17 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 highExtremeVery highApr 12UV 13Dec 17UV 9
UV index (midday)Level
Jan10Very high
Feb12Extreme
Mar13Extreme
Apr14Extreme
May11Extreme
Jun11Extreme
Jul9Very high
Aug11Extreme
Sep13Extreme
Oct12Extreme
Nov10Very high
Dec9Very high

Air quality in Bianouan 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 Bianouan is worst in January — around 68 µg/m³ PM2.5 (unhealthy), about 4.0× the cleanest month (September, 17 µg/m³).

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

020406080JanFebMarAprMayJunJulAugSepOctNovDecUnhealthyPoorModerateJan 1867 µg/m³Sep 1017 µg/m³
PM2.5 (µg/m³)Level
Jan68Unhealthy
Feb61Unhealthy
Mar39Poor
Apr36Poor
May23Moderate
Jun20Moderate
Jul20Moderate
Aug17Moderate
Sep17Moderate
Oct21Moderate
Nov29Moderate
Dec57Unhealthy
Location & terrain

Where is Bianouan?

Bianouan sits at 6.0°N, 3.2°W, 119 m above sea level, in Ivory Coast. The nearest listed city is Aboisso Comoé, 39 km away.

EbilassokroBiébyAboissoMaféréAhigbé KoffikroNiabléAdzopé

Topography around Bianouan

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

Within 3 km, the terrain around Bianouan has only modest variations in elevation — a maximum elevation change of 88 m around an average of 120 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 153 m; within 80 km, large variations in elevation — a maximum elevation change of 617 m.

The land around Bianouan is covered by trees (89%) within 3 km, trees (93%) within 16 km, and trees (96%) within 80 km.

3 km
88 m
16 km
153 m
80 km
617 m
treesshrubsgrasslandartificial surfaceswater
September weather nearby: Aboisso Comoé 39 km · Ebilassokro 44 km · Biéby 50 km · Aboisso 61 km · Maféré 69 km · Ahigbé Koffikro 70 km · Niablé 73 km · Adzopé 75 km

Ivory Coast travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type C / E
230 V · 50 Hz
Prices
≈ 37% of US
price level, 2025
GDP per capita
$3,050
2025
Happiness
5.1 / 10
World Happiness, 2025
Safe drinking water
36%
of population, 2024
Road deaths
24.1
per 100k/yr, 2019
Income group
Lower middle
World Bank
English
Very low
EF EPI 393

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 Bianouan (6.012°, -3.1902°, elevation 119 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. 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).