Nyeri weather in September

In September, Nyeri sees average daytime highs of 20°C and overnight lows near 11°C, with 46 mm of rain across 11.9 wet days and about 12 hours of daylight. It is the 7th-warmest and 12th-wettest month of the year here.

Highs climb over the month, from about 19°C in the first days to 21°C by the end. The sky is clear or mostly clear about 18% 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 Nyeri's 5th-clearest and 2nd-windiest month. For the whole year in context, see Nyeri's year-round climate.

Daytime high
20°
7th warmest
Overnight low
11°
5th coldest
Rainfall
46 mm
11.9 wet days
Daylight
12 hours
6:27 AM – 6:26 PM
Cloud cover
62%
5th clearest
Wind
7 km/h
2nd windiest
Solar energy
5.64 kWh/m²
Travel score
5.9
out of 10

Nyeri is town in the Central Highlands of Kenya.

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 19°C in the first days to 21°C by the end.

A typical September day in Nyeri reaches about 20°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 22°C. Set against its neighbours, September runs about 2°C warmer than August and on par with October.

10°15°20°25°151015202530
Avg high (°C)Avg low (°C)
11911
21911
31911
41911
51911
61911
71911
81911
91911
101911
112011
122011
132011
142011
152011
162011
172011
182011
192011
202011
212011
222011
232011
242011
252011
262111
272111
282111
292111
302111

Nyeri weather by month

How September compares with the rest of the year at a glance. September is the 7th-warmest and 12th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan22° / 11°11014.5126.1
Feb23° / 11°8411.9126.4
Mar23° / 12°13318.5125.6
Apr21° / 13°20625.4124.1
May20° / 13°15822.2124.5
Jun19° / 12°7716.6124.9
Jul18° / 11°5214.1125.0
Aug18° / 11°5715.4125.0
Sep20° / 11°4611.9125.9
Oct20° / 12°12918.7125.1
Nov20° / 12°23026.4123.8
Dec21° / 12°18122124.7

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 18% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 26% of September, with mostly cloudy or overcast conditions the remaining 56%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
12872
23070
33070
43268
53367
63565
73664
83862
94159
104258
114258
124456
134654
144753
154753
164852
174951
184951
195050
205050
215050
225050
235050
245050
255050
265050
275050
285149
295050
305050

Chance of precipitation in September

Any precipitation

Nyeri gets around 46 mm of rain over 11.9 wet days in September, the driest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 40% and peaks near 49% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
149
248
348
447
547
646
745
844
943
1042
1141
1240
1339
1438
1537
1637
1736
1836
1935
2035
2135
2235
2335
2436
2536
2637
2738
2838
2939
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 88% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)
18812
28812
38812
48812
58812
68911
78911
88911
98911
108911
118911
128911
138911
148911
158911
168911
178911
188911
198911
208812
218812
228812
238713
248713
258614
268614
278515
288416
298317
308218

Wind in September

Winds average 7 km/h in September.

Across September, 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.

0246810151015202530
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

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 6:32 AM to 6:21 AM, and sunset from 6:32 PM to 6:22 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.06:326:32
212.06:326:31
312.06:316:31
412.06:316:31
512.06:316:30
612.06:306:30
712.06:306:30
812.06:306:29
912.06:296:29
1012.06:296:29
1112.06:296:28
1212.06:286:28
1312.06:286:28
1412.06:276:27
1512.06:276:27
1612.06:276:26
1712.06:266:26
1812.06:266:26
1912.06:256:25
2012.06:256:25
2112.06:256:25
2212.06:246:24
2312.06:246:24
2412.06:246:24
2512.06:236:23
2612.06:236:23
2712.06:226:23
2812.06:226:22
2912.06:226:22
3012.06:216:22

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.64 kWh/m².

For context, solar energy here swings from a low near 4.21 kWh/m² to a high of 6.61 kWh/m² in February across the year — September's 5.64 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.0Bright
25.0Bright
35.1Bright
45.1Bright
55.2Bright
65.2Bright
75.3Bright
85.3Bright
95.4Bright
105.4Bright
115.5Bright
125.5Bright
135.6Bright
145.7Bright
155.7Bright
165.7Bright
175.8Bright
185.8Bright
195.8Bright
205.9Bright
215.9Bright
225.9Bright
235.9Bright
245.9Bright
255.9Bright
265.9Bright
275.9Bright
285.9Bright
295.9Bright
305.9Bright
Planning a trip in September

Is September a good time to visit Nyeri?

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

5.9
Sightseeing
3rd-best month of the year
3.0
Beach & pool
4th-best month of the year

September is a reasonable time to visit Nyeri for sightseeing.

What to pack for Nyeri in September

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

In September, Nyeri sees daytime highs around 20°C and nights near 11°C. Worth packing: rain gear and sun protection. About 12 days see rain.

rain gearsun protection

UV index in Nyeri 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 Nyeri 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
Oct14Extreme
Nov14Extreme
Dec13Extreme

Air quality in Nyeri 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 Nyeri is worst in June — around 65 µg/m³ PM2.5 (unhealthy), and holds fairly steady the rest of the year.

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

020406080JanFebMarAprMayJunJulAugSepOctNovDecUnhealthyPoorUnhealthyJun 1864 µg/m³Sep 2348 µg/m³
PM2.5 (µg/m³)Level
Jan62Unhealthy
Feb59Unhealthy
Mar56Unhealthy
Apr56Unhealthy
May57Unhealthy
Jun65Unhealthy
Jul60Unhealthy
Aug51Poor
Sep48Poor
Oct48Poor
Nov60Unhealthy
Dec64Unhealthy
Location & terrain

Where is Nyeri?

Nyeri sits at 0.4°S, 36.9°E, 1,812 m above sea level, in Kenya. The nearest listed city is Tetu, 4.0 km away.

Topography around Nyeri

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

Within 3 km, the terrain around Nyeri has only modest variations in elevation — a maximum elevation change of 231 m around an average of 1,798 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 986 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,987 m.

The land around Nyeri is covered by trees (54%) within 3 km, trees (55%) and shrubs (23%) within 16 km, and trees (32%), grassland (30%) and shrubs (21%) within 80 km.

3 km
231 m
16 km
986 m
80 km
3,987 m
treesshrubsgrasslandcroplandartificial surfaceswater
September weather nearby: Tetu 4.0 km · Karatina 21 km · Kerugoya 38 km · Murang’a 40 km · Karuri 41 km · Nanyuki 49 km · Wanguru 54 km · Embu 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 Nyeri (-0.4201°, 36.9476°, elevation 1,812 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).