Biéby weather in September

In September, Biéby sees average daytime highs of 29°C and overnight lows near 22°C, with 153 mm of rain across 25.8 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 Biéby's 8th-clearest and 4th-windiest month. For the whole year in context, see Biéby's year-round climate.

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

Biéby is town and sub-prefecture in Lagunes, 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 Biéby 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 28°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
152922
162923
172923
182923
192923
202923
212923
222923
232923
243023
253023
263023
273023
283023
293023
303023

How September really feels in Biéby

Once humidity and wind are folded in, September averages 30 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
30
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.

Biéby 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°409.411.74.0
Feb33° / 23°7014.611.83.0
Mar33° / 24°12422.7122.5
Apr32° / 23°13023.412.12.6
May31° / 23°1682712.32.7
Jun29° / 23°17627.212.33.0
Jul28° / 22°13023.212.33.8
Aug28° / 22°9720.312.24.2
Sep29° / 22°15325.8123.3
Oct30° / 23°16828.411.92.8
Nov31° / 22°11322.711.73.1
Dec31° / 22°5212.911.74.2

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
3694
4694
5694
6793
7793
8793
9793
10892
11892
12991
13991
14991
151090
161090
171090
181189
191189
201189
211288
221288
231387
241387
251486
261486
271585
281684
291783
301783

Chance of precipitation in September

Any precipitation

Biéby gets around 153 mm of rain over 25.8 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 85% 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 (%)
179
280
380
481
581
682
782
883
983
1083
1183
1283
1384
1484
1585
1685
1786
1886
1987
2088
2188
2289
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 (%)Miserable (%)
14960
24960
34960
43970
53970
63970
73970
83970
93970
103970
113970
123970
133970
143970
152980
162980
172980
182980
192980
201990
211981
221981
231981
241981
251981
261981
271981
281981
291981
300991

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
97calm
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 6:11 AM to 6:05 AM, and sunset from 6:18 PM to 6:02 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.16:116:18
212.16:116:17
312.16:106:17
412.16:106:16
512.16:106:16
612.16:106:15
712.16:106:15
812.16:096:14
912.16:096:14
1012.16:096:13
1112.16:096:13
1212.16:096:12
1312.16:086:11
1412.06:086:11
1512.06:086:10
1612.06:086:10
1712.06:086:09
1812.06:076:09
1912.06:076:08
2012.06:076:08
2112.06:076:07
2212.06:076:07
2312.06:066:06
2412.06:066:06
2512.06:066:05
2612.06:066:04
2712.06:066:04
2812.06:066:03
2912.06:056:03
3012.06:056:02

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.02 kWh/m².

For context, solar energy here swings from a low near 3.73 kWh/m² to a high of 5.04 kWh/m² in April across the year — September's 4.02 kWh/m² falls in the middle.

012345151015202530
Solar energy (kWh/m²)Level
13.9Moderate
23.9Moderate
33.9Moderate
43.9Moderate
53.9Moderate
63.9Moderate
73.9Moderate
83.9Moderate
94.0Moderate
104.0Moderate
114.0Moderate
124.0Moderate
134.0Moderate
144.0Bright
154.0Bright
164.0Bright
174.0Bright
184.0Bright
194.1Bright
204.1Bright
214.1Bright
224.1Bright
234.1Bright
244.1Bright
254.1Bright
264.2Bright
274.2Bright
284.2Bright
294.2Bright
304.2Bright
Planning a trip in September

Hazard calendar for Biéby

In seasonPeak

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

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

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

Is September a good time to visit Biéby?

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 Biéby.

What to pack for Biéby in September

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

In September, Biéby 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 Biéby 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 Biéby peaks around April 12 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 16 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 16UV 9
UV index (midday)Level
Jan10Very high
Feb12Extreme
Mar13Extreme
Apr13Extreme
May11Extreme
Jun11Extreme
Jul9Very high
Aug11Extreme
Sep13Extreme
Oct12Extreme
Nov10Very high
Dec9Very high

Air quality in Biéby 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 Biéby is worst in January — around 71 µg/m³ PM2.5 (unhealthy), about 3.6× the cleanest month (August, 20 µg/m³).

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

020406080JanFebMarAprMayJunJulAugSepOctNovDecUnhealthyPoorModeratePoorJan 1670 µg/m³Aug 2220 µg/m³
PM2.5 (µg/m³)Level
Jan71Unhealthy
Feb63Unhealthy
Mar43Poor
Apr41Poor
May29Moderate
Jun25Moderate
Jul23Moderate
Aug20Moderate
Sep21Moderate
Oct26Moderate
Nov36Poor
Dec63Unhealthy
Location & terrain

Where is Biéby?

Biéby sits at 6.1°N, 3.6°W, 114 m above sea level, in Ivory Coast. The nearest listed city is Adzopé, 25 km away.

AkoupéAfferyBécédi-BrignanAboisso ComoéEbilassokroBianouanAgboville

Topography around Biéby

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

Within 3 km, the terrain around Biéby has only modest variations in elevation — a maximum elevation change of 67 m around an average of 109 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 152 m; within 80 km, significant variations in elevation — a maximum elevation change of 349 m.

The land around Biéby is covered by trees (95%) within 3 km, trees (97%) within 16 km, and trees (95%) within 80 km.

3 km
67 m
16 km
152 m
80 km
349 m
treesshrubsgrasslandartificial surfaceswater
September weather nearby: Adzopé 25 km · Akoupé 44 km · Affery 44 km · Bécédi-Brignan 46 km · Aboisso Comoé 46 km · Ebilassokro 46 km · Bianouan 50 km · Agboville 66 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 Biéby (6.0787°, -3.6355°, elevation 114 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).