Kollo weather in May

In May, Kollo sees average daytime highs of 40°C and overnight lows near 29°C, with 9 mm of rain across 2.5 wet days and about 12.6 hours of daylight. It is the 2nd-warmest and 6th-wettest month of the year here.

Highs ease over the month, from about 40°C in the first days to 39°C by the end. The sky is clear or mostly clear about 48% of the time in May, and the air most often feels muggy.

Daylight stretches from about 12 h 30 min at the start of May to 12 h 42 min by month's end. Set against the rest of the year, May is Kollo's 9th-clearest and 6th-windiest month. For the whole year in context, see Kollo's year-round climate.

Daytime high
40°
2nd warmest
Overnight low
29°
12th coldest
Rainfall
9 mm
2.5 wet days
Daylight
12 h 36 min
6:29 AM – 7:05 PM
Cloud cover
47%
9th clearest
Wind
12 km/h
6th windiest
Solar energy
6.76 kWh/m²
Travel score
0.3
out of 10

Temperature in May

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 40°C in the first days to 39°C by the end.

A typical May day in Kollo reaches about 40°C in the afternoon and slips back to 29°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 37°C and 42°C. Set against its neighbours, May runs on par with April and about 3°C warmer than June.

25°30°35°40°45°151015202531
Avg high (°C)Avg low (°C)
14129
24129
34029
44029
54029
64029
74029
84029
94029
104029
114029
124029
134029
144029
154029
164029
174029
184029
194029
204029
213929
223929
233929
243929
253929
263928
273928
283928
293928
303928
313828

How May really feels in Kollo

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
31 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.

Kollo weather by month

How May compares with the rest of the year at a glance. May is the 2nd-warmest and 6th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan31° / 17°0011.35.7
Feb34° / 20°00.111.63.7
Mar38° / 23°10.311.91.2
Apr40° / 27°30.912.30.0
May40° / 29°92.512.60.3
Jun37° / 27°255.412.81.7
Jul34° / 26°6811.612.73.0
Aug32° / 24°13215.712.43.5
Sep34° / 25°507.512.13.2
Oct37° / 25°92.311.71.8
Nov36° / 20°0011.42.6
Dec33° / 18°0011.24.9

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 48% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 17% of May, with mostly cloudy or overcast conditions the remaining 35%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16139
26040
36040
46040
56040
66040
76139
86139
96139
106238
116238
126337
136337
146535
156535
166634
176733
186733
196832
206832
216832
226931
236931
246931
256832
266832
276832
286832
296832
306832
316832

Chance of precipitation in May

Any precipitation

Kollo gets around 9 mm of rain over 2.5 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 8% and peaks near 13% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%151015202531
Rain chance (%)
15
25
35
45
55
66
76
86
96
106
117
127
137
147
158
168
178
188
199
209
219
229
2310
2410
2510
2611
2711
2812
2912
3013
3113

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, May lands in the muggy band about 50% of days. Sticky, muggy-or-worse air turns up on roughly 63% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1201229353
2191129373
3171129394
4161129414
5141029434
6131028445
712928465
811928475
99927486
108827497
117827517
126827518
136727528
145727529
1547265310
1646265311
1736265312
1836255313
1925255414
2025245415
2125235416
2214225617
2314225419
2414215420
2514205421
2613185622
2703175624
2803165625
2903155527
3002135728
3102125729

Wind in May

Winds average 12 km/h in May.

Across May, daily wind ranges from about 11 km/h on the calmest days to 12 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
111calm
211calm
311calm
412calm
512calm
612calm
712calm
812calm
912calm
1012calm
1112calm
1212calm
1312calm
1412calm
1512calm
1612light breeze
1712light breeze
1812light breeze
1912light breeze
2012light breeze
2112light breeze
2212light breeze
2312light breeze
2412light breeze
2512light breeze
2612light breeze
2712light breeze
2812light breeze
2912light breeze
3012light breeze
3112light breeze

Sunrise & sunset in May

DaylightNight

Daylight runs from about 12 h 30 min at the start of May to 12 h 42 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 6:34 AM to 6:26 AM, and sunset from 7:02 PM to 7:10 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.56:347:02
212.56:337:02
312.56:337:02
412.56:337:02
512.56:327:03
612.56:327:03
712.56:317:03
812.56:317:03
912.56:317:04
1012.66:307:04
1112.66:307:04
1212.66:307:04
1312.66:297:04
1412.66:297:05
1512.66:297:05
1612.66:297:05
1712.66:287:06
1812.66:287:06
1912.66:287:06
2012.66:287:06
2112.76:277:07
2212.76:277:07
2312.76:277:07
2412.76:277:08
2512.76:277:08
2612.76:277:08
2712.76:277:08
2812.76:277:09
2912.76:277:09
3012.76:267:09
3112.76:267:10

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 6.76 kWh/m².

For context, solar energy here swings from a low near 5.6 kWh/m² to a high of 7.02 kWh/m² in April across the year — May's 6.76 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
16.9Intense
26.8Intense
36.8Intense
46.8Intense
56.8Intense
66.8Intense
76.8Intense
86.8Intense
96.8Intense
106.8Intense
116.8Intense
126.8Intense
136.8Intense
146.8Intense
156.8Intense
166.8Intense
176.8Intense
186.8Intense
196.8Intense
206.7Intense
216.7Intense
226.7Intense
236.7Intense
246.7Intense
256.7Intense
266.7Intense
276.7Intense
286.7Intense
296.7Intense
306.7Intense
316.7Intense
Planning a trip in May

Hazard calendar for Kollo

In seasonPeak

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

Kollo sees seasonal dust haze (January–July), heaviest in March.

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

Is May a good time to visit Kollo?

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

0.3
Sightseeing
11th-best month of the year
3.1
Beach & pool
11th-best month of the year

May is a weaker month for outdoor sightseeing in Kollo.

What to pack for Kollo in May

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

In May, Kollo sees daytime highs around 40°C and nights near 29°C. Pack light clothes and sun protection.

light clothessun protection

UV index in Kollo in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 10 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Kollo peaks around August 18 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 13 at about 8 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highAug 18UV 13Dec 13UV 8
UV index (midday)Level
Jan10Very high
Feb11Extreme
Mar13Extreme
Apr10Extreme
May10Extreme
Jun11Extreme
Jul11Extreme
Aug13Extreme
Sep12Extreme
Oct11Extreme
Nov9Very high
Dec8Very high

Air quality in Kollo 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 Kollo is worst in February — around 97 µg/m³ PM2.5 (unhealthy), about 5.0× the cleanest month (August, 20 µg/m³).

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

0306090120JanFebMarAprMayJunJulAugSepOctNovDecUnhealthyPoorModeratePoorUnhealthyFeb 2197 µg/m³Aug 1320 µg/m³
PM2.5 (µg/m³)Level
Jan87Unhealthy
Feb97Unhealthy
Mar96Unhealthy
Apr74Unhealthy
May46Poor
Jun34Moderate
Jul22Moderate
Aug20Moderate
Sep26Moderate
Oct48Poor
Nov62Unhealthy
Dec77Unhealthy
Location & terrain

Where is Kollo?

Kollo sits at 13.3°N, 2.3°E, 189 m above sea level, in Niger. The nearest listed city is Youri Kourtéré, 10 km away.

DossoTillabéri

Topography around Kollo

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

Within 3 km, the terrain around Kollo has only modest variations in elevation — a maximum elevation change of 32 m around an average of 183 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 97 m; within 80 km, only modest variations in elevation — a maximum elevation change of 119 m.

The land around Kollo is covered by grassland (46%) and cropland (30%) within 3 km, grassland (61%) within 16 km, and grassland (65%) within 80 km.

3 km
32 m
16 km
97 m
80 km
119 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwaterwetland
May weather nearby: Youri Kourtéré 10 km · Say 23 km · Niamey 34 km · Torodi 62 km · Birnin Gaouré 67 km · Baléyara 85 km · Dosso 97 km · Tillabéri 139 km

Niger travel facts

Travel advisory
Level 4
Do Not Travel
Power plugs
Type A / B / C / D / E / F
220 V · 50 Hz
Prices
≈ 36% of US
price level, 2025
GDP per capita
$775
2025
Happiness
4.9 / 10
World Happiness, 2025
Homicide rate
4.4
per 100k, 2012
Road deaths
25.5
per 100k/yr, 2019
Income group
Low
World Bank
Religion
Muslim 96%ethnic religionist 4%Christian 0%agnostics and other 0%

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 Kollo (13.3043°, 2.339°, elevation 189 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).