Ouinhi weather in September

In September, Ouinhi sees average daytime highs of 30°C and overnight lows near 23°C, with 143 mm of rain across 24.2 wet days and about 12 hours of daylight. It is the 10th-warmest and 3rd-wettest month of the year here.

Day-to-day highs hold fairly steady near 30°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 11 h 54 min by month's end. Set against the rest of the year, September is Ouinhi's 10th-clearest and 8th-windiest month. For the whole year in context, see Ouinhi's year-round climate.

Daytime high
30°
10th warmest
Overnight low
23°
3rd coldest
Rainfall
143 mm
24.2 wet days
Daylight
12 hours
6:43 AM – 6:46 PM
Cloud cover
83%
10th clearest
Wind
7 km/h
8th windiest
Solar energy
4.01 kWh/m²
Travel score
3.3
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 30°C through the month.

A typical September day in Ouinhi reaches about 30°C in the afternoon and slips back to 23°C overnight — a 6°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)
12923
22923
32923
42923
52923
62923
72923
82923
92923
102923
112923
122923
132923
143023
153023
163023
173023
183023
193023
203023
213023
223023
233023
243023
253023
263023
273023
283023
293023
303023

How September really feels in Ouinhi

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.

Ouinhi weather by month

How September compares with the rest of the year at a glance. September is the 10th-warmest and 3rd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan34° / 24°164.911.63.6
Feb35° / 25°307.711.82.9
Mar34° / 26°6315.1122.6
Apr33° / 25°9117.612.22.7
May32° / 24°14724.612.32.7
Jun30° / 24°16225.312.43.0
Jul29° / 23°1382312.43.6
Aug29° / 23°12420.712.24.0
Sep30° / 23°14324.2123.3
Oct31° / 23°12823.711.83.1
Nov32° / 24°4511.911.73.7
Dec33° / 24°174.511.64.0

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 8% of September, with mostly cloudy or overcast conditions the remaining 92%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
1694
2694
3694
4694
5694
6694
7694
8793
9793
10793
11793
12793
13793
14892
15892
16892
17892
18892
19991
20991
21991
22991
23991
24991
25991
26991
27991
28991
291090
301090

Chance of precipitation in September

Any precipitation

Ouinhi gets around 143 mm of rain over 24.2 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 80% and peaks near 81% on the wettest days.

0%20%40%60%80%151015202530
Rain chance (%)
180
281
381
481
581
681
781
881
981
1081
1181
1281
1381
1481
1580
1680
1780
1880
1980
2079
2179
2279
2379
2479
2580
2680
2780
2880
2980
3081

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 98% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202530
Muggy (%)Oppressive (%)Miserable (%)
11990
21990
31990
401000
501000
601000
70991
80991
90991
100991
110991
120991
130991
140991
150991
160991
170991
180982
190982
200982
210982
220982
230982
240973
250973
260973
270964
280964
290955
300955

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
47calm
57calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
197calm
207calm
216calm
226calm
236calm
246calm
256calm
266calm
276calm
286calm
296calm
306calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 06 min at the start of September to 11 h 54 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 12 minutes over September. Sunrise moves from 6:46 AM to 6:41 AM, and sunset from 6:54 PM to 6:38 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.16:466:54
212.16:466:53
312.16:456:53
412.16:456:52
512.16:456:52
612.16:456:51
712.16:456:51
812.16:456:50
912.16:446:50
1012.16:446:49
1112.16:446:48
1212.16:446:48
1312.16:446:47
1412.16:446:47
1512.06:436:46
1612.06:436:46
1712.06:436:45
1812.06:436:44
1912.06:436:44
2012.06:436:43
2112.06:426:43
2212.06:426:42
2312.06:426:42
2412.06:426:41
2512.06:426:40
2612.06:426:40
2712.06:416:39
2812.06:416:39
2912.06:416:38
3011.96:416:38

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.01 kWh/m².

For context, solar energy here swings from a low near 3.73 kWh/m² to a high of 5.46 kWh/m² in February across the year — September's 4.01 kWh/m² sits near the bottom.

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
114.0Moderate
124.0Moderate
134.0Moderate
144.0Moderate
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 Ouinhi

In seasonPeak

In September, Ouinhi sits inside its rainy season season. The full year is below, with each hazard's peak months called out.

Ouinhi's rainy season runs April–October, when most of the year's rain falls.

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

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

Is September a good time to visit Ouinhi?

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

3.3
Sightseeing
6th-best month of the year
4.4
Beach & pool
10th-best month of the year

September is a weaker month for outdoor sightseeing in Ouinhi.

What to pack for Ouinhi in September

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

In September, Ouinhi sees daytime highs around 30°C and nights near 23°C. Pack light clothes and rain gear. About 24 days see rain.

light clothesrain gear

UV index in Ouinhi 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 Ouinhi peaks around April 11 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 18 at about 8 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecVery highExtremeVery highApr 11UV 13Dec 18UV 8
UV index (midday)Level
Jan8Very high
Feb8Very high
Mar12Extreme
Apr13Extreme
May11Extreme
Jun11Extreme
Jul11Extreme
Aug10Very high
Sep12Extreme
Oct12Extreme
Nov9Very high
Dec7Very high

Air quality in Ouinhi 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 Ouinhi is worst in January — around 102 µg/m³ PM2.5 (unhealthy), about 4.2× the cleanest month (August, 25 µg/m³).

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

0306090120JanFebMarAprMayJunJulAugSepOctNovDecUnhealthyPoorModeratePoorUnhealthyJan 16100 µg/m³Aug 1425 µg/m³
PM2.5 (µg/m³)Level
Jan102Unhealthy
Feb86Unhealthy
Mar47Poor
Apr44Poor
May33Moderate
Jun30Moderate
Jul27Moderate
Aug25Moderate
Sep29Moderate
Oct39Poor
Nov46Poor
Dec89Unhealthy
Location & terrain

Where is Ouinhi?

Ouinhi sits at 7.1°N, 2.5°E, 37 m above sea level, in Benin. The nearest listed city is Adjaouèrè, 16 km away.

SakétéBohicon

Topography around Ouinhi

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

Within 3 km, the terrain around Ouinhi has only modest variations in elevation — a maximum elevation change of 42 m around an average of 34 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 136 m; within 80 km, significant variations in elevation — a maximum elevation change of 359 m.

The land around Ouinhi is covered by trees (44%) and cropland (32%) within 3 km, trees (35%), cropland (28%) and grassland (26%) within 16 km, and trees (44%) and shrubs (25%) within 80 km.

3 km
42 m
16 km
136 m
80 km
359 m
treesshrubsgrasslandcroplandartificial surfaceswaterwetland
September weather nearby: Adjaouèrè 16 km · Cové 22 km · Pobé 23 km · Kétou 34 km · Kpozoun 34 km · 39 km · Sakété 43 km · Bohicon 47 km

Benin travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type C / E
220 V · 50 Hz
Prices
≈ 34% of US
price level, 2025
GDP per capita
$1,658
2025
Happiness
4.4 / 10
World Happiness, 2025
Safe drinking water
18%
of population, 2024
Homicide rate
1.1
per 100k, 2017
Road deaths
26.8
per 100k/yr, 2019
Income group
Lower middle
World Bank
English
Very low
EF EPI 406
Religion
Muslim 28%Roman Catholic 26%Protestant 14%Vodoun 12%

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 Ouinhi (7.0841°, 2.4834°, elevation 37 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).