Ol Kalou weather in May

In May, Ol Kalou sees average daytime highs of 19°C and overnight lows near 11°C, with 181 mm of rain across 18.4 wet days and about 12 hours of daylight. It is the 5th-warmest and 5th-wettest month of the year here.

Day-to-day highs hold fairly steady near 19°C through the month. The sky is clear or mostly clear about 11% of the time in May, and the air most often feels dry.

Daylight stretches from about 12 hours at the start of May to 12 hours by month's end. Set against the rest of the year, May is Ol Kalou's 6th-clearest and 2nd-windiest month. For the whole year in context, see Ol Kalou's year-round climate.

Daytime high
19°
5th warmest
Overnight low
11°
12th coldest
Rainfall
181 mm
18.4 wet days
Daylight
12 hours
6:31 AM – 6:30 PM
Cloud cover
67%
6th clearest
Wind
7 km/h
2nd windiest
Solar energy
5.58 kWh/m²
Travel score
4.9
out of 10

Ol Kalou is town in Kenya.

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in May

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 19°C through the month.

A typical May day in Ol Kalou reaches about 19°C in the afternoon and slips back to 11°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 18°C and 21°C. Set against its neighbours, May runs about 1°C cooler than April and about 1°C warmer than June.

10°15°20°25°151015202531
Avg high (°C)Avg low (°C)
12011
22011
31911
41911
51911
61911
71911
81911
91911
101911
111911
121911
131911
141911
151911
161911
171911
181911
191910
201910
211910
221910
231910
241910
251910
261910
271910
281910
291910
301910
311910

Ol Kalou 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
Jan20° / 668.4126.6
Feb22° / 525.7127.1
Mar22° / 11211.8126.4
Apr20° / 10°23520.6124.6
May19° / 11°18118.4124.9
Jun18° / 10°13917.5124.8
Jul17° / 16422.1124.0
Aug18° / 19022.8123.9
Sep19° / 13816.8125.1
Oct19° / 20620124.6
Nov19° / 10°21123.4124.1
Dec19° / 9513.4125.6

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 11% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 26% of May, with mostly cloudy or overcast conditions the remaining 63%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
12377
22377
32476
42575
52773
62773
72971
83070
93070
103268
113367
123565
133763
143763
153862
163961
174159
184159
194258
204357
214555
224555
234654
244555
254654
264654
274654
284654
294753
304555
314555

Chance of precipitation in May

Any precipitation

Ol Kalou gets around 181 mm of rain over 18.4 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 60% and peaks near 76% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%80%151015202531
Rain chance (%)
176
276
375
474
574
673
772
871
970
1069
1167
1265
1364
1462
1560
1659
1757
1856
1954
2053
2151
2250
2349
2448
2547
2647
2747
2847
2947
3048
3149

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, May lands in the dry band about 98% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)
1964
2964
3964
4964
5964
6964
7964
8973
9973
10973
11982
12982
13982
14982
15991
16991
17991
18991
19991
20991
21991
22991
23991
24991
25991
26991
27991
28991
29991
30991
31991

Wind in May

Winds average 7 km/h in May.

Across May, daily wind ranges from about 7 km/h on the calmest days to 8 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
17calm
27calm
37calm
47calm
57calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
197calm
208calm
218calm
228calm
238calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm
317calm

Sunrise & sunset in May

DaylightNight

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

Days grow by about 0 minutes over May. Sunrise moves from 6:32 AM to 6:32 AM, and sunset from 6:31 PM to 6:31 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.06:326:31
212.06:326:31
312.06:326:31
412.06:326:31
512.06:326:31
612.06:316:31
712.06:316:31
812.06:316:31
912.06:316:31
1012.06:316:31
1112.06:316:30
1212.06:316:30
1312.06:316:30
1412.06:316:30
1512.06:316:30
1612.06:316:30
1712.06:316:30
1812.06:316:30
1912.06:316:30
2012.06:316:30
2112.06:316:31
2212.06:316:31
2312.06:316:31
2412.06:326:31
2512.06:326:31
2612.06:326:31
2712.06:326:31
2812.06:326:31
2912.06:326:31
3012.06:326:31
3112.06:326:31

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.58 kWh/m².

For context, solar energy here swings from a low near 4.81 kWh/m² to a high of 6.95 kWh/m² in February across the year — May's 5.58 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.4Bright
25.4Bright
35.4Bright
45.4Bright
55.4Bright
65.4Bright
75.4Bright
85.4Bright
95.5Bright
105.5Bright
115.5Bright
125.5Bright
135.5Bright
145.6Bright
155.6Bright
165.6Bright
175.6Bright
185.6Bright
195.7Bright
205.7Bright
215.7Bright
225.7Bright
235.7Bright
245.7Bright
255.7Bright
265.7Bright
275.7Bright
285.6Bright
295.6Bright
305.6Bright
315.5Bright
Planning a trip in May

Is May a good time to visit Ol Kalou?

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

4.9
Sightseeing
6th-best month of the year
2.3
Beach & pool
6th-best month of the year

May is a reasonable time to visit Ol Kalou for sightseeing.

What to pack for Ol Kalou in May

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

In May, Ol Kalou sees daytime highs around 19°C and nights near 11°C. Pack rain gear. Worth having: sun protection. About 18 days see rain.

rain gearsun protection

UV index in Ol Kalou in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May 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 Ol Kalou peaks around March 16 at about 17 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 19 at about 11 (extreme).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeMar 16UV 17Jun 19UV 11
UV index (midday)Level
Jan16Extreme
Feb16Extreme
Mar17Extreme
Apr16Extreme
May13Extreme
Jun11Extreme
Jul12Extreme
Aug13Extreme
Sep14Extreme
Oct15Extreme
Nov14Extreme
Dec13Extreme

Air quality in Ol Kalou 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 Ol Kalou is worst in June — around 34 µg/m³ PM2.5 (moderate), and holds fairly steady the rest of the year.

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecModerateJun 2334 µg/m³Oct 1224 µg/m³
PM2.5 (µg/m³)Level
Jan27Moderate
Feb31Moderate
Mar28Moderate
Apr27Moderate
May28Moderate
Jun34Moderate
Jul34Moderate
Aug28Moderate
Sep25Moderate
Oct24Moderate
Nov27Moderate
Dec28Moderate
Location & terrain

Where is Ol Kalou?

Ol Kalou sits at 0.3°S, 36.4°E, 2,348 m above sea level, in Kenya. The nearest listed city is Upper Gilgil, 14 km away.

Topography around Ol Kalou

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

Within 3 km, the terrain around Ol Kalou has only modest variations in elevation — a maximum elevation change of 197 m around an average of 2,380 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 803 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,992 m.

The land around Ol Kalou is covered by cropland (51%) and grassland (23%) within 3 km, cropland (40%) and grassland (31%) within 16 km, and grassland (33%), trees (24%) and cropland (23%) within 80 km.

3 km
197 m
16 km
803 m
80 km
2,992 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
May weather nearby: Upper Gilgil 14 km · Gilgil 27 km · Mairo Inya 33 km · Nakuru 34 km · Nyahururu 34 km · Njoro 49 km · Naivasha 50 km · Rongai 58 km

Kenya travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type G
240 V · 50 Hz
Prices
≈ 34% of US
price level, 2025
GDP per capita
$2,363
2025
Happiness
4.7 / 10
World Happiness, 2025
Homicide rate
4.9
per 100k, 2022
Road deaths
28.3
per 100k/yr, 2019
Income group
Lower middle
World Bank
English
High
EF EPI 593
Religion
Christian 86%Muslim 11%other 2%none 2%

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 Ol Kalou (-0.2709°, 36.3792°, elevation 2,348 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).