Kérou weather in May

In May, Kérou sees average daytime highs of 35°C and overnight lows near 25°C, with 90 mm of rain across 16 wet days and about 12.5 hours of daylight. It is the 5th-warmest and 5th-wettest month of the year here.

Highs ease over the month, from about 36°C in the first days to 33°C by the end. The sky is clear or mostly clear about 23% of the time in May, and the air most often feels oppressive.

Daylight stretches from about 12 h 24 min at the start of May to 12 h 36 min by month's end. Set against the rest of the year, May is Kérou's 9th-clearest and 5th-windiest month. For the whole year in context, see Kérou's year-round climate.

Daytime high
35°
5th warmest
Overnight low
25°
11th coldest
Rainfall
90 mm
16 wet days
Daylight
12 h 30 min
6:33 AM – 7:03 PM
Cloud cover
64%
9th clearest
Wind
9 km/h
5th windiest
Solar energy
6.13 kWh/m²
Travel score
2.3
out of 10

Temperature in May

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 36°C in the first days to 33°C by the end.

A typical May day in Kérou reaches about 35°C in the afternoon and slips back to 25°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 32°C and 37°C. Set against its neighbours, May runs about 3°C cooler than April and about 3°C warmer than June.

20°25°30°35°40°151015202531
Avg high (°C)Avg low (°C)
13625
23625
33625
43625
53625
63625
73525
83525
93525
103525
113525
123525
133525
143525
153525
163525
173525
183425
193425
203425
213425
223424
233424
243424
253424
263424
273324
283324
293324
303324
313324

How May really feels in Kérou

Once humidity and wind are folded in, May averages 31 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
31
18 feel dangerously hot (≥ 39°C)
Days feeling ≤ C
0
wind chill below the day's low

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

Kérou weather by month

How May compares with the rest of the year at a glance. May is the 5th-warmest and 5th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan33° / 19°10.111.44.8
Feb35° / 22°20.511.63.0
Mar38° / 24°91.911.91.5
Apr37° / 26°378.312.21.5
May35° / 25°901612.52.3
Jun32° / 23°11118.912.63.1
Jul30° / 23°19724.112.63.4
Aug29° / 22°27626.812.43.3
Sep30° / 22°18622.212.13.4
Oct33° / 22°5810.311.83.6
Nov35° / 20°10.411.53.5
Dec33° / 19°0011.44.5

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 23% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 20% of May, with mostly cloudy or overcast conditions the remaining 57%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14060
24060
34060
44159
54258
64258
74258
84357
94456
104456
114555
124555
134555
144555
154555
164555
174555
184654
194654
204456
214456
224456
234357
244357
254258
264258
274258
284159
294159
304159
314159

Chance of precipitation in May

Any precipitation

Kérou gets around 90 mm of rain over 16 wet days in May. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 51% and peaks near 63% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%151015202531
Rain chance (%)
142
243
343
444
545
645
746
846
947
1047
1147
1248
1348
1449
1550
1650
1751
1852
1952
2053
2154
2255
2356
2457
2558
2659
2760
2861
2962
3063
3163

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, May lands in the oppressive band about 83% of days. Sticky, muggy-or-worse air turns up on roughly 99% of them.

0%25%50%75%100%151015202531
Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
11326700
21325701
31224721
41223731
51222741
60221761
70121771
80120781
90119791
100118801
110117811
120016831
130015841
140015841
150014851
160013861
170013861
180012862
190012862
200011872
210011872
220010882
23009892
24009883
25008893
26008893
27007903
28007903
29006913
30006913
31006913

Wind in May

Winds average 9 km/h in May.

Across May, daily wind ranges from about 8 km/h on the calmest days to 9 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
19calm
29calm
39calm
49calm
59calm
69calm
79calm
89calm
99calm
109calm
119calm
129calm
139calm
149calm
159calm
169calm
179calm
189calm
199calm
209calm
219calm
229calm
239calm
248calm
258calm
268calm
278calm
288calm
298calm
308calm
318calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 12 h 24 min at the start of May to 12 h 36 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 12 minutes over May. Sunrise moves from 6:37 AM to 6:32 AM, and sunset from 7:00 PM to 7:06 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.46:377:00
212.46:377:00
312.46:377:00
412.46:367:01
512.46:367:01
612.46:367:01
712.46:357:01
812.46:357:01
912.46:357:01
1012.56:347:01
1112.56:347:02
1212.56:347:02
1312.56:347:02
1412.56:337:02
1512.56:337:02
1612.56:337:03
1712.56:337:03
1812.56:337:03
1912.56:327:03
2012.56:327:04
2112.56:327:04
2212.56:327:04
2312.56:327:04
2412.56:327:05
2512.66:327:05
2612.66:327:05
2712.66:327:05
2812.66:327:06
2912.66:327:06
3012.66:327:06
3112.66:327:06

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 6.13 kWh/m².

For context, solar energy here swings from a low near 4.59 kWh/m² to a high of 6.59 kWh/m² in March across the year — May's 6.13 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
16.3Intense
26.3Intense
36.3Intense
46.2Intense
56.2Intense
66.2Intense
76.2Intense
86.2Intense
96.2Intense
106.2Intense
116.2Intense
126.2Intense
136.2Intense
146.2Intense
156.2Intense
166.2Intense
176.2Intense
186.1Intense
196.1Intense
206.1Intense
216.1Intense
226.1Intense
236.1Intense
246.0Intense
256.0Intense
266.0Intense
276.0Bright
286.0Bright
296.0Bright
305.9Bright
315.9Bright
Planning a trip in May

Hazard calendar for Kérou

In seasonPeak

In May, Kérou sits inside its dust season. The full year is below, with each hazard's peak months called out.

Kérou's monsoon runs July–September, when most of the year's rain falls.

Kérou sees seasonal dust haze (January–June), heaviest in March.

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

Is May a good time to visit Kérou?

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

2.3
Sightseeing
10th-best month of the year
4.8
Beach & pool
7th-best month of the year

May is a weaker month for outdoor sightseeing in Kérou.

What to pack for Kérou in May

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

In May, Kérou sees daytime highs around 35°C and nights near 25°C. Pack light clothes, rain gear and sun protection. About 16 days see rain.

light clothesrain gearsun protection

UV index in Kérou in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 11 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Kérou peaks around September 13 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 15 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 highSep 13UV 12Dec 15UV 8
UV index (midday)Level
Jan9Very high
Feb11Extreme
Mar10Very high
Apr12Extreme
May11Extreme
Jun11Extreme
Jul11Extreme
Aug12Extreme
Sep12Extreme
Oct10Extreme
Nov9Very high
Dec8Very high

Air quality in Kérou in May

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where May falls, not just the annual average.

Air quality in Kérou is worst in February — around 86 µg/m³ PM2.5 (unhealthy), about 6.4× the cleanest month (August, 14 µg/m³).

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

0306090JanFebMarAprMayJunJulAugSepOctNovDecUnhealthyPoorModeratePoorUnhealthyFeb 1384 µg/m³Aug 1114 µg/m³
PM2.5 (µg/m³)Level
Jan72Unhealthy
Feb86Unhealthy
Mar62Unhealthy
Apr44Poor
May24Moderate
Jun19Moderate
Jul14Moderate
Aug14Moderate
Sep19Moderate
Oct33Moderate
Nov46Poor
Dec67Unhealthy
Location & terrain

Where is Kérou?

Kérou sits at 10.8°N, 2.1°E, 332 m above sea level, in Benin. The nearest listed city is Sinendé, 61 km away.

SinendéBanikoaraPéhonkoTobréToukountounaBembèrèkèTanguiétaKandi

Topography around Kérou

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

Within 3 km, the terrain around Kérou has only modest variations in elevation — a maximum elevation change of 46 m around an average of 330 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 106 m; within 80 km, significant variations in elevation — a maximum elevation change of 475 m.

The land around Kérou is covered by cropland (49%) and shrubs (23%) within 3 km, cropland (65%) within 16 km, and cropland (41%), shrubs (31%) and grassland (23%) within 80 km.

3 km
46 m
16 km
106 m
80 km
475 m
treesshrubsgrasslandcroplandartificial surfaces
May weather nearby: Sinendé 61 km · Banikoara 64 km · Péhonko 67 km · Tobré 70 km · Toukountouna 88 km · Bembèrèkè 90 km · Tanguiéta 94 km · Kandi 97 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 Kérou (10.8258°, 2.1048°, elevation 332 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).