Ongata Rongai weather in September

In September, Ongata Rongai sees average daytime highs of 26°C and overnight lows near 14°C, with 12 mm of rain across 2.2 wet days and about 12 hours of daylight. It is the 6th-warmest and 11th-wettest month of the year here.

Highs climb over the month, from about 25°C in the first days to 27°C by the end. The sky is clear or mostly clear about 20% of the time in September, and the air most often feels dry.

Daylight stretches from about 12 hours at the start of September to 12 hours by month's end. Set against the rest of the year, September is Ongata Rongai's 6th-clearest and 7th-windiest month. For the whole year in context, see Ongata Rongai's year-round climate.

Daytime high
26°
6th warmest
Overnight low
14°
3rd coldest
Rainfall
12 mm
2.2 wet days
Daylight
12 hours
6:27 AM – 6:27 PM
Cloud cover
63%
6th clearest
Wind
9 km/h
7th windiest
Solar energy
5.84 kWh/m²
Travel score
7.7
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 25°C in the first days to 27°C by the end.

A typical September day in Ongata Rongai reaches about 26°C in the afternoon and slips back to 14°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 23°C and 28°C. Set against its neighbours, September runs about 2°C warmer than August and about 1°C cooler than October.

10°15°20°25°30°151015202530
Avg high (°C)Avg low (°C)
12414
22414
32514
42514
52514
62514
72514
82514
92514
102514
112514
122514
132514
142614
152614
162614
172614
182614
192614
202614
212615
222615
232615
242615
252615
262615
272715
282715
292715
302715

Ongata Rongai weather by month

How September compares with the rest of the year at a glance. September is the 6th-warmest and 11th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan27° / 16°315.612.17.3
Feb28° / 16°234.4126.9
Mar28° / 17°499.4126.3
Apr26° / 17°10016.1125.6
May25° / 16°8214.711.96.1
Jun24° / 15°346.411.97.0
Jul23° / 14°112.611.97.4
Aug24° / 14°153.1127.5
Sep26° / 14°122.2127.7
Oct26° / 16°316.9127.0
Nov25° / 16°7515.812.15.8
Dec26° / 16°459.412.16.9

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 20% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 22% of September, with mostly cloudy or overcast conditions the remaining 57%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
12575
22674
32674
42872
52971
63070
73367
83466
93565
103862
114060
124258
134357
144555
154654
164852
174951
185050
195050
205248
215248
225248
235248
245149
255149
265149
274951
284951
294951
304951

Chance of precipitation in September

Any precipitation

Ongata Rongai gets around 12 mm of rain over 2.2 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 8% and peaks near 10% on the wettest days.

0%10%20%30%151015202530
Rain chance (%)
110
210
39
49
59
69
79
88
98
108
118
127
137
147
157
167
177
187
197
207
217
227
237
247
257
267
278
288
298
309

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the dry band about 85% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)
18614
28614
38614
48614
58614
68614
78614
88614
98614
108614
118614
128614
138614
148614
158614
168614
178614
188614
198614
208614
218515
228515
238515
248416
258317
268218
278119
288020
297921
307822

Wind in September

Winds average 9 km/h in September.

Across September, daily wind ranges from about 8 km/h on the calmest days to 10 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
18calm
28calm
38calm
48calm
59calm
69calm
79calm
89calm
99calm
109calm
119calm
129calm
139calm
149calm
159calm
169calm
179calm
189calm
199calm
209calm
2110calm
2210calm
2310calm
2410calm
2510calm
2610calm
2710calm
2810calm
2910calm
3010calm

Sunrise & sunset in September

DaylightNight

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

Days grow by about 0 minutes over September. Sunrise moves from 6:33 AM to 6:22 AM, and sunset from 6:32 PM to 6:23 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.06:336:32
212.06:336:32
312.06:336:31
412.06:326:31
512.06:326:31
612.06:326:30
712.06:316:30
812.06:316:30
912.06:306:29
1012.06:306:29
1112.06:306:29
1212.06:296:28
1312.06:296:28
1412.06:286:28
1512.06:286:27
1612.06:276:27
1712.06:276:27
1812.06:276:26
1912.06:266:26
2012.06:266:26
2112.06:256:25
2212.06:256:25
2312.06:256:25
2412.06:246:24
2512.06:246:24
2612.06:236:24
2712.06:236:23
2812.06:236:23
2912.06:226:23
3012.06:226:23

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.84 kWh/m².

For context, solar energy here swings from a low near 4.38 kWh/m² to a high of 6.77 kWh/m² in February across the year — September's 5.84 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.1Bright
25.2Bright
35.2Bright
45.3Bright
55.3Bright
65.4Bright
75.4Bright
85.5Bright
95.5Bright
105.6Bright
115.6Bright
125.7Bright
135.8Bright
145.8Bright
155.9Bright
165.9Bright
176.0Bright
186.0Intense
196.0Intense
206.1Intense
216.1Intense
226.1Intense
236.2Intense
246.2Intense
256.2Intense
266.2Intense
276.2Intense
286.2Intense
296.2Intense
306.2Intense
Planning a trip in September

Hazard calendar for Ongata Rongai

In seasonPeak

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

Ongata Rongai's rainy season runs March–May, when most of the year's rain falls.

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

Is September a good time to visit Ongata Rongai?

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

7.7
Sightseeing
1st-best month of the year
7.2
Beach & pool
3rd-best month of the year

September is one of the better times to visit Ongata Rongai for general sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Ongata Rongai in September

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

In September, Ongata Rongai sees daytime highs around 26°C and nights near 14°C. Worth packing: light clothes and sun protection.

light clothessun protection

UV index in Ongata Rongai in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 14 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Ongata Rongai 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 Ongata Rongai 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 Ongata Rongai 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 Ongata Rongai?

Ongata Rongai sits at 1.4°S, 36.8°E, 1,731 m above sea level, in Kenya. The nearest listed city is Lang'ata, 5.0 km away.

Topography around Ongata Rongai

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

Within 3 km, the terrain around Ongata Rongai has only modest variations in elevation — a maximum elevation change of 125 m around an average of 1,734 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 914 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,909 m.

The land around Ongata Rongai is covered by artificial surfaces (27%), trees (23%) and shrubs (22%) within 3 km, grassland (47%) and trees (20%) within 16 km, and grassland (39%) and shrubs (35%) within 80 km.

3 km
125 m
16 km
914 m
80 km
2,909 m
treesshrubsgrasslandcroplandartificial surfaceswater
September weather nearby: Lang'ata 5.0 km · Kiserian 9.0 km · Ngong 11 km · Nairobi 14 km · Imara Daima Estate 15 km · Pumwani 16 km · Mlolongo 20 km · Kikuyu 20 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 Ongata Rongai (-1.3953°, 36.764°, elevation 1,731 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).