Ruiru weather in May

In May, Ruiru sees average daytime highs of 24°C and overnight lows near 16°C, with 74 mm of rain across 15.1 wet days and about 11.9 hours of daylight. It is the 8th-warmest and 3rd-wettest month of the year here.

Day-to-day highs hold fairly steady near 24°C through the month. The sky is clear or mostly clear about 11% of the time in May, and the air most often feels comfortable.

Daylight stretches from about 12 hours at the start of May to 11 h 54 min by month's end. Set against the rest of the year, May is Ruiru's 8th-clearest and 10th-windiest month. For the whole year in context, see Ruiru's year-round climate.

Daytime high
24°
8th warmest
Overnight low
16°
10th coldest
Rainfall
74 mm
15.1 wet days
Daylight
11 h 54 min
6:30 AM – 6:27 PM
Cloud cover
66%
8th clearest
Wind
7 km/h
10th windiest
Solar energy
5.06 kWh/m²
Travel score
6.1
out of 10

Temperature in May

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 24°C through the month.

A typical May day in Ruiru reaches about 24°C in the afternoon and slips back to 16°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 22°C and 26°C. Set against its neighbours, May runs about 1°C cooler than April and about 1°C warmer than June.

10°15°20°25°30°151015202531
Avg high (°C)Avg low (°C)
12517
22517
32417
42417
52417
62417
72417
82416
92416
102416
112416
122416
132416
142416
152416
162416
172416
182416
192416
202416
212416
222416
232416
242416
252416
262416
272416
282416
292415
302415
312415

Ruiru weather by month

How May compares with the rest of the year at a glance. May is the 8th-warmest and 3rd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan26° / 15°306.812.17.3
Feb27° / 16°215.1127.2
Mar27° / 17°5812.7126.2
Apr25° / 17°12022124.9
May24° / 16°7415.111.96.1
Jun23° / 15°285.711.97.0
Jul23° / 14°9211.97.3
Aug23° / 14°122.6127.4
Sep25° / 14°102.1127.8
Oct26° / 16°449.6126.7
Nov24° / 16°12321.212.15.1
Dec25° / 15°5713.712.16.4

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 29% of May, with mostly cloudy or overcast conditions the remaining 61%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13565
23565
33664
43664
53763
63763
73862
83862
94060
104060
114159
124159
134159
144159
154060
164258
174258
184258
194159
204159
214060
224060
234258
244159
254060
264060
273961
283961
293961
303763
313763

Chance of precipitation in May

Any precipitation

Ruiru gets around 74 mm of rain over 15.1 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 49% and peaks near 71% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%80%151015202531
Rain chance (%)
171
271
370
469
568
667
766
864
963
1061
1159
1256
1354
1452
1550
1648
1746
1844
1942
2039
2138
2236
2334
2433
2532
2631
2730
2829
2929
3028
3128

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, May lands in the comfortable band about 57% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)
103763
203763
303862
403961
504060
614158
714257
814455
914653
1014851
1115049
1225246
1325543
1425741
1535938
1636136
1746234
1846531
1956629
2066727
2176825
2277023
2387022
2497120
25107119
26117019
27127018
28136918
29146917
30156817
31166717

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 7 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
207calm
217calm
227calm
237calm
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 11 h 54 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 6 minutes over May. Sunrise moves from 6:31 AM to 6:31 AM, and sunset from 6:28 PM to 6:28 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.06:316:28
212.06:306:28
312.06:306:28
412.06:306:28
512.06:306:28
612.06:306:27
712.06:306:27
812.06:306:27
912.06:306:27
1012.06:306:27
1112.06:306:27
1212.06:306:27
1312.06:306:27
1411.96:306:27
1511.96:306:27
1611.96:306:27
1711.96:306:27
1811.96:306:27
1911.96:306:27
2011.96:306:27
2111.96:306:27
2211.96:306:27
2311.96:306:27
2411.96:306:27
2511.96:316:27
2611.96:316:27
2711.96:316:27
2811.96:316:27
2911.96:316:27
3011.96:316:28
3111.96:316:28

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.06 kWh/m².

For context, solar energy here swings from a low near 4.05 kWh/m² to a high of 6.81 kWh/m² in February across the year — May's 5.06 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.2Bright
25.2Bright
35.1Bright
45.1Bright
55.1Bright
65.1Bright
75.1Bright
85.1Bright
95.1Bright
105.1Bright
115.1Bright
125.1Bright
135.1Bright
145.1Bright
155.1Bright
165.1Bright
175.1Bright
185.1Bright
195.1Bright
205.1Bright
215.1Bright
225.0Bright
235.0Bright
245.0Bright
255.0Bright
265.0Bright
275.0Bright
285.0Bright
294.9Bright
304.9Bright
314.9Bright
Planning a trip in May

Is May a good time to visit Ruiru?

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

6.1
Sightseeing
10th-best month of the year
5.2
Beach & pool
10th-best month of the year

May is a reasonable time to visit Ruiru for sightseeing.

What to pack for Ruiru in May

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

In May, Ruiru sees daytime highs around 24°C and nights near 16°C. Pack rain gear. Worth having: light clothes and sun protection. About 15 days see rain.

rain gearlight clothessun protection

UV index in Ruiru 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 Ruiru peaks around March 15 at about 16 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 20 at about 10 (extreme).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeMar 15UV 16Jun 20UV 10
UV index (midday)Level
Jan15Extreme
Feb15Extreme
Mar16Extreme
Apr15Extreme
May11Extreme
Jun10Extreme
Jul11Extreme
Aug12Extreme
Sep14Extreme
Oct14Extreme
Nov14Extreme
Dec13Extreme

Air quality in Ruiru 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 Ruiru is worst in June — around 53 µg/m³ PM2.5 (poor), and holds fairly steady the rest of the year.

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecPoorModeratePoorJun 1652 µg/m³Oct 1033 µg/m³
PM2.5 (µg/m³)Level
Jan48Poor
Feb43Poor
Mar41Poor
Apr44Poor
May47Poor
Jun53Poor
Jul48Poor
Aug39Poor
Sep34Moderate
Oct33Moderate
Nov45Poor
Dec50Poor
Location & terrain

Where is Ruiru?

Ruiru sits at 1.1°S, 37.0°E, 1,531 m above sea level, in Kenya. The nearest listed city is Juja, 8.0 km away.

Topography around Ruiru

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

Within 3 km, the terrain around Ruiru has only modest variations in elevation — a maximum elevation change of 66 m around an average of 1,531 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 362 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,970 m.

The land around Ruiru is covered by artificial surfaces (46%) and cropland (23%) within 3 km, grassland (24%) and artificial surfaces (20%) within 16 km, and grassland (34%) and shrubs (28%) within 80 km.

3 km
66 m
16 km
362 m
80 km
2,970 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
May weather nearby: Juja 8.0 km · Kiambu 14 km · Githunguri 17 km · Thika 17 km · Pumwani 20 km · Imara Daima Estate 22 km · Nairobi 22 km · Githunguri 23 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 Ruiru (-1.1466°, 36.9609°, elevation 1,531 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).