Sé weather in September

In September, Sé sees average daytime highs of 29°C and overnight lows near 24°C, with 167 mm of rain across 25.2 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 11 h 54 min by month's end. Set against the rest of the year, September is 's 9th-clearest and 6th-windiest month. For the whole year in context, see 's year-round climate.

Daytime high
29°
10th warmest
Overnight low
24°
3rd coldest
Rainfall
167 mm
25.2 wet days
Daylight
12 hours
6:46 AM – 6:48 PM
Cloud cover
81%
9th clearest
Wind
8 km/h
6th windiest
Solar energy
4.47 kWh/m²
Travel score
3.4
out of 10

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 Sé reaches about 29°C in the afternoon and slips back to 24°C overnight — a 5°C spread between the day's warmth and the night's chill. On most days the high lands between 27°C and 30°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)
12823
22823
32823
42823
52924
62924
72924
82924
92924
102924
112924
122924
132924
142924
152924
162924
172924
182924
192924
202924
212924
222924
232924
242924
252924
262924
272924
282924
292924
302924

How September really feels in Sé

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.

Sé 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° / 24°309.711.74.3
Feb32° / 26°4612.111.83.5
Mar32° / 26°8020122.9
Apr32° / 25°11621.412.12.9
May31° / 25°19426.212.32.7
Jun29° / 24°20726.712.43.1
Jul28° / 24°12922.712.34.0
Aug28° / 23°10118.912.24.6
Sep29° / 24°16725.2123.4
Oct30° / 24°18827.111.93.0
Nov31° / 25°9521.911.73.2
Dec32° / 25°4312.611.64.2

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 11% of September, with mostly cloudy or overcast conditions the remaining 88%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
1892
2892
3892
4991
5991
6991
71090
81090
91090
101090
111090
121090
131189
141189
151189
161189
171189
181288
191387
201387
211387
221387
231486
241486
251486
261486
271585
281585
291585
301585

Chance of precipitation in September

Any precipitation

Sé gets around 167 mm of rain over 25.2 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 84% and peaks near 87% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%100%151015202530
Rain chance (%)
177
278
379
480
580
681
782
882
983
1083
1183
1284
1384
1485
1585
1685
1785
1885
1985
2086
2186
2286
2386
2486
2587
2687
2787
2887
2987
3087

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 88% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202530
Oppressive (%)Miserable (%)
1973
2973
3964
4964
5964
6955
7955
8955
9946
10946
11946
12937
13928
14928
15919
169010
178911
188812
198713
208614
218515
228416
238317
248218
258119
267921
277822
287624
297525
307327

Wind in September

Winds average 8 km/h in September.

Across September, daily wind ranges from about 7 km/h on the calmest days to 9 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
19calm
29calm
39calm
49calm
59calm
69calm
79calm
89calm
99calm
109calm
119calm
129calm
139calm
148calm
158calm
168calm
178calm
188calm
198calm
208calm
218calm
228calm
238calm
248calm
258calm
268calm
278calm
288calm
298calm
307calm

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 6:49 AM to 6:44 AM, and sunset from 6:56 PM to 6:40 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.16:496:56
212.16:486:56
312.16:486:55
412.16:486:55
512.16:486:54
612.16:486:54
712.16:486:53
812.16:476:52
912.16:476:52
1012.16:476:51
1112.16:476:51
1212.16:476:50
1312.16:476:50
1412.06:466:49
1512.06:466:49
1612.06:466:48
1712.06:466:48
1812.06:466:47
1912.06:456:46
2012.06:456:46
2112.06:456:45
2212.06:456:45
2312.06:456:44
2412.06:446:44
2512.06:446:43
2612.06:446:43
2712.06:446:42
2812.06:446:42
2912.06:446:41
3011.96:446:40

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.47 kWh/m².

For context, solar energy here swings from a low near 4.19 kWh/m² to a high of 5.6 kWh/m² in March across the year — September's 4.47 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
14.3Bright
24.3Bright
34.3Bright
44.3Bright
54.3Bright
64.3Bright
74.4Bright
84.4Bright
94.4Bright
104.4Bright
114.4Bright
124.4Bright
134.4Bright
144.4Bright
154.5Bright
164.5Bright
174.5Bright
184.5Bright
194.5Bright
204.5Bright
214.5Bright
224.6Bright
234.6Bright
244.6Bright
254.6Bright
264.6Bright
274.6Bright
284.6Bright
294.7Bright
304.7Bright
Planning a trip in September

Hazard calendar for Sé

In seasonPeak

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

Sé 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 Sé?

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

3.4
Sightseeing
6th-best month of the year
4.3
Beach & pool
9th-best month of the year

September is a weaker month for outdoor sightseeing in Sé.

What to pack for Sé in September

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

In September, sees daytime highs around 29°C and nights near 24°C. Pack light clothes and rain gear. About 25 days see rain.

light clothesrain gear

Sea temperature near Sé 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 43 km away) is warmest in May at about 29°C and coldest in August near 25°C.

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

24°26°28°30°JanFebMarAprMayJunJulAugSepOctNovDecrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan28Warm
Feb28Tropical
Mar29Tropical
Apr29Tropical
May29Tropical
Jun28Warm
Jul25Warm
Aug25Warm
Sep26Warm
Oct27Warm
Nov28Tropical
Dec28Tropical

UV index in Sé 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 peaks around April 10 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 16 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 highExtremeExtremeVery highApr 10UV 13Dec 16UV 8
UV index (midday)Level
Jan9Very high
Feb11Extreme
Mar13Extreme
Apr13Extreme
May11Extreme
Jun11Extreme
Jul10Extreme
Aug10Very high
Sep12Extreme
Oct12Extreme
Nov9Very high
Dec8Very high

Air quality in Sé 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 is worst in January — around 111 µg/m³ PM2.5 (unhealthy), about 4.0× the cleanest month (August, 28 µg/m³).

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

0306090120JanFebMarAprMayJunJulAugSepOctNovDecUnhealthyPoorModeratePoorUnhealthyJan 14109 µg/m³Aug 1228 µg/m³
PM2.5 (µg/m³)Level
Jan111Unhealthy
Feb87Unhealthy
Mar49Poor
Apr48Poor
May37Poor
Jun34Moderate
Jul29Moderate
Aug28Moderate
Sep33Moderate
Oct46Poor
Nov52Poor
Dec99Unhealthy
Location & terrain

Where is Sé?

Sé sits at 6.5°N, 1.8°E, 32 m above sea level, in Benin. The nearest listed city is Comé, 13 km away.

Topography around Sé

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

Within 3 km, the terrain around Sé has only modest variations in elevation — a maximum elevation change of 54 m around an average of 29 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 103 m; within 80 km, significant variations in elevation — a maximum elevation change of 253 m.

The land around is covered by trees (63%) within 3 km, trees (51%) and grassland (21%) within 16 km, and trees (34%) and water (26%) within 80 km.

3 km
54 m
16 km
103 m
80 km
253 m
treesshrubsgrasslandcroplandartificial surfaceswaterwetland
September weather nearby: Comé 13 km · Lokossa 19 km · Athiémé 19 km · Kouandé 29 km · Dogbo 32 km · Ouidah 33 km · Tabligbo 37 km · Vogan 38 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 (6.5111°, 1.8283°, elevation 32 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. 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. 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).