Nyahururu weather in September

In September, Nyahururu sees average daytime highs of 23°C and overnight lows near 11°C, with 186 mm of rain across 14.4 wet days and about 12 hours of daylight. It is the 8th-warmest and 6th-wettest month of the year here.

Highs climb over the month, from about 22°C in the first days to 23°C by the end. The sky is clear or mostly clear about 7% 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 Nyahururu's 5th-clearest and 5th-windiest month. For the whole year in context, see Nyahururu's year-round climate.

Daytime high
23°
8th warmest
Overnight low
11°
3rd coldest
Rainfall
186 mm
14.4 wet days
Daylight
12 hours
6:29 AM – 6:29 PM
Cloud cover
65%
5th clearest
Wind
6 km/h
5th windiest
Solar energy
6.47 kWh/m²
Travel score
5.9
out of 10

Nyahururu is human settlement.

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

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 22°C in the first days to 23°C by the end.

A typical September day in Nyahururu reaches about 23°C in the afternoon and slips back to 11°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 21°C and 25°C. Set against its neighbours, September runs about 2°C warmer than August and on par with October.

10°15°20°25°30°151015202530
Avg high (°C)Avg low (°C)
12212
22212
32211
42211
52211
62211
72211
82211
92211
102211
112211
122211
132211
142311
152311
162311
172311
182311
192311
202311
212311
222311
232311
242311
252311
262311
272311
282311
292311
302312

Nyahururu weather by month

How September compares with the rest of the year at a glance. September is the 8th-warmest and 6th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan24° / 11°656.9127.4
Feb26° / 11°454.8127.4
Mar26° / 12°1418.4126.9
Apr24° / 13°35716.3125.7
May23° / 13°36816.3125.7
Jun22° / 12°16917.5125.3
Jul21° / 12°18022.6124.5
Aug21° / 12°21423124.5
Sep23° / 11°18614.4125.9
Oct23° / 12°34817.8125.5
Nov22° / 12°32118.7125.1
Dec23° / 12°12411.1126.6

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 7% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 33% of September, with mostly cloudy or overcast conditions the remaining 59%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
13466
23466
33664
43664
53763
63862
73961
84060
94159
104258
114357
124456
134456
144456
154555
164555
174555
184456
194456
204357
214357
224258
234159
244060
254060
263862
273862
283862
293862
303763

Chance of precipitation in September

Any precipitation

Nyahururu gets around 186 mm of rain over 14.4 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 49% and peaks near 69% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%80%151015202530
Rain chance (%)
169
267
366
464
562
660
758
856
954
1052
1150
1248
1347
1445
1544
1643
1742
1842
1941
2041
2141
2241
2341
2441
2541
2641
2741
2841
2941
3041

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 82% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)
17426
27426
37525
47525
57624
67723
77822
87822
97921
108020
118119
128218
138317
148317
158416
168416
178515
188515
198614
208614
218614
228614
238614
248614
258614
268614
278614
288614
298614
308614

Wind in September

Winds average 6 km/h in September.

Across September, daily wind ranges from about 6 km/h on the calmest days to 6 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
16calm
26calm
36calm
46calm
56calm
66calm
76calm
86calm
96calm
106calm
116calm
126calm
136calm
146calm
156calm
166calm
176calm
186calm
196calm
206calm
216calm
226calm
236calm
246calm
256calm
266calm
276calm
286calm
296calm
306calm

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 6:34 AM to 6:24 AM, and sunset from 6:34 PM to 6:24 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.06:346:34
212.06:346:34
312.06:346:34
412.06:336:33
512.06:336:33
612.06:336:33
712.06:326:32
812.06:326:32
912.06:316:31
1012.06:316:31
1112.06:316:31
1212.06:306:30
1312.06:306:30
1412.06:306:30
1512.06:296:29
1612.06:296:29
1712.06:286:29
1812.06:286:28
1912.06:286:28
2012.06:276:27
2112.06:276:27
2212.06:276:27
2312.06:266:26
2412.06:266:26
2512.06:266:26
2612.06:256:25
2712.06:256:25
2812.06:256:25
2912.06:246:24
3012.06:246:24

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 6.47 kWh/m².

For context, solar energy here swings from a low near 5.11 kWh/m² to a high of 7.12 kWh/m² in February across the year — September's 6.47 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.9Bright
26.0Bright
36.0Intense
46.0Intense
56.1Intense
66.1Intense
76.2Intense
86.2Intense
96.3Intense
106.3Intense
116.4Intense
126.4Intense
136.5Intense
146.5Intense
156.5Intense
166.5Intense
176.6Intense
186.6Intense
196.6Intense
206.6Intense
216.7Intense
226.7Intense
236.7Intense
246.7Intense
256.7Intense
266.7Intense
276.7Intense
286.6Intense
296.6Intense
306.6Intense
Planning a trip in September

Is September a good time to visit Nyahururu?

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

5.9
Sightseeing
5th-best month of the year
4.3
Beach & pool
7th-best month of the year

September is a reasonable time to visit Nyahururu for sightseeing.

What to pack for Nyahururu in September

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

In September, Nyahururu sees daytime highs around 23°C and nights near 11°C. Pack rain gear and sun protection. Worth having: light clothes. About 14 days see rain.

rain gearsun protectionlight clothes

UV index in Nyahururu 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 Nyahururu 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
Aug12Extreme
Sep14Extreme
Oct15Extreme
Nov14Extreme
Dec13Extreme

Air quality in Nyahururu 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 Nyahururu is worst in June — around 38 µg/m³ PM2.5 (poor), and holds fairly steady the rest of the year.

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecModeratePoorModerateJun 2338 µg/m³Jan 1227 µg/m³
PM2.5 (µg/m³)Level
Jan27Moderate
Feb29Moderate
Mar32Moderate
Apr28Moderate
May31Moderate
Jun38Poor
Jul37Poor
Aug32Moderate
Sep30Moderate
Oct28Moderate
Nov28Moderate
Dec27Moderate
Location & terrain

Where is Nyahururu?

Nyahururu sits at 0.0°N, 36.4°E, 2,373 m above sea level, in Kenya. The nearest listed city is Mairo Inya, 5.0 km away.

Eldama Ravine

Topography around Nyahururu

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

Within 3 km, the terrain around Nyahururu has significant variations in elevation — a maximum elevation change of 286 m around an average of 2,354 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 947 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,011 m.

The land around Nyahururu is covered by grassland (29%), cropland (23%) and trees (20%) within 3 km, cropland (34%), trees (24%) and grassland (20%) within 16 km, and grassland (37%) and shrubs (22%) within 80 km.

3 km
286 m
16 km
947 m
80 km
3,011 m
treesshrubsgrasslandcroplandartificial surfaceswaterwetland
September weather nearby: Mairo Inya 5.0 km · Upper Gilgil 30 km · Ol Kalou 34 km · Nakuru 50 km · Rongai 60 km · Gilgil 60 km · Njoro 62 km · Eldama Ravine 71 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 Nyahururu (0.0381°, 36.3634°, elevation 2,373 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).