Meru weather in September

In September, Meru sees average daytime highs of 27°C and overnight lows near 17°C, with 10 mm of rain across 2.1 wet days and about 12 hours of daylight. It is the 3rd-warmest and 11th-wettest month of the year here.

Highs climb over the month, from about 26°C in the first days to 28°C by the end. The sky is clear or mostly clear about 51% 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 Meru's 1st-clearest and 2nd-windiest month. For the whole year in context, see Meru's year-round climate.

Daytime high
27°
3rd warmest
Overnight low
17°
7th coldest
Rainfall
10 mm
2.1 wet days
Daylight
12 hours
6:24 AM – 6:24 PM
Cloud cover
41%
1st clearest
Wind
12 km/h
2nd windiest
Solar energy
6.47 kWh/m²
Travel score
7.9
out of 10

Meru is town in Kenya.

Founded
1911

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 26°C in the first days to 28°C by the end.

A typical September day in Meru reaches about 27°C in the afternoon and slips back to 17°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 25°C and 29°C. Set against its neighbours, September runs about 2°C warmer than August and on par with October.

15°20°25°30°151015202530
Avg high (°C)Avg low (°C)
12616
22617
32617
42617
52617
62717
72717
82717
92717
102717
112717
122717
132717
142717
152717
162717
172717
182717
192817
202817
212817
222817
232817
242817
252817
262817
272817
282817
292817
302817

Meru weather by month

How September compares with the rest of the year at a glance. September is the 3rd-warmest and 11th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan27° / 16°397.5127.2
Feb28° / 17°204.8127.1
Mar28° / 18°428.8126.5
Apr27° / 18°8413.8126.0
May26° / 18°377.3127.2
Jun25° / 17°132.8127.8
Jul25° / 16°101.8128.0
Aug25° / 16°112.2127.9
Sep27° / 17°102.1127.9
Oct27° / 18°439.2126.8
Nov25° / 17°11220.6125.3
Dec25° / 16°5513.2126.5

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 51% of the time in September, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 23% of September, with mostly cloudy or overcast conditions the remaining 26%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
16436
26535
36634
46733
56832
66832
77030
87129
97129
107228
117327
127426
137426
147525
157525
167624
177624
187723
197723
207723
217822
227822
237822
247822
257921
267921
277921
287822
297921
307921

Chance of precipitation in September

Any precipitation

Meru gets around 10 mm of rain over 2.1 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 12% on the wettest days.

0%10%20%30%151015202530
Rain chance (%)
18
27
37
47
57
67
77
87
97
107
117
127
137
146
156
166
177
187
197
207
217
227
238
248
259
269
2710
2810
2911
3012

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 58% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)
159401
259401
359401
459401
559401
659401
759401
859401
959401
1059401
1159401
1259401
1359401
1460391
1560391
1660391
1760391
1860391
1960391
2059392
2159392
2259392
2358402
2456413
2555423
2654433
2753443
2851454
2949474
3047485

Wind in September

Winds average 12 km/h in September.

Across September, daily wind ranges from about 11 km/h on the calmest days to 12 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
112light breeze
212light breeze
312light breeze
412light breeze
512light breeze
612light breeze
712light breeze
812light breeze
912light breeze
1012light breeze
1112light breeze
1212light breeze
1312light breeze
1412light breeze
1512light breeze
1612light breeze
1712light breeze
1812light breeze
1912light breeze
2012calm
2112calm
2212calm
2312calm
2412calm
2512calm
2612calm
2712calm
2812calm
2912calm
3011calm

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 6:29 AM to 6:19 AM, and sunset from 6:29 PM to 6:19 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.06:296:29
212.06:296:29
312.06:286:28
412.06:286:28
512.06:286:28
612.06:276:27
712.06:276:27
812.06:276:27
912.06:266:26
1012.06:266:26
1112.06:266:26
1212.06:256:25
1312.06:256:25
1412.06:246:24
1512.06:246:24
1612.06:246:24
1712.06:236:23
1812.06:236:23
1912.06:236:23
2012.06:226:22
2112.06:226:22
2212.06:216:21
2312.06:216:21
2412.06:216:21
2512.06:206:20
2612.06:206:20
2712.06:206:20
2812.06:196:19
2912.06:196:19
3012.06:196:19

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 5.06 kWh/m² to a high of 6.63 kWh/m² in February across the year — September's 6.47 kWh/m² sits near the top of that range.

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
116.3Intense
126.4Intense
136.4Intense
146.5Intense
156.5Intense
166.5Intense
176.6Intense
186.6Intense
196.6Intense
206.7Intense
216.7Intense
226.7Intense
236.7Intense
246.7Intense
256.7Intense
266.7Intense
276.7Intense
286.7Intense
296.7Intense
306.6Intense
Planning a trip in September

Is September a good time to visit Meru?

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

7.9
Sightseeing
2nd-best month of the year
8.1
Beach & pool
1st-best month of the year

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

What to pack for Meru in September

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

In September, Meru sees daytime highs around 27°C and nights near 17°C. Pack light clothes and sun protection.

light clothessun protection

UV index in Meru 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 Meru peaks around March 17 at about 16 (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 17UV 16Jun 19UV 11
UV index (midday)Level
Jan15Extreme
Feb15Extreme
Mar16Extreme
Apr16Extreme
May12Extreme
Jun11Extreme
Jul12Extreme
Aug12Extreme
Sep14Extreme
Oct14Extreme
Nov13Extreme
Dec13Extreme

Air quality in Meru 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 Meru is worst in February — around 32 µg/m³ PM2.5 (moderate), about 1.7× the cleanest month (September, 19 µg/m³).

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecModerateFeb 1832 µg/m³Sep 1819 µg/m³
PM2.5 (µg/m³)Level
Jan30Moderate
Feb32Moderate
Mar31Moderate
Apr28Moderate
May25Moderate
Jun28Moderate
Jul27Moderate
Aug21Moderate
Sep19Moderate
Oct20Moderate
Nov29Moderate
Dec32Moderate
Location & terrain

Where is Meru?

Meru sits at 0.0°N, 37.7°E, 1,579 m above sea level, in Kenya. The nearest listed city is Isiolo, 35 km away.

NanyukiEmbuKerugoyaKaratinaWanguru

Topography around Meru

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

Within 3 km, the terrain around Meru has significant variations in elevation — a maximum elevation change of 418 m around an average of 1,566 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,570 m; within 80 km, extreme variations in elevation — a maximum elevation change of 4,755 m.

The land around Meru is covered by trees (72%) within 3 km, trees (53%) and cropland (24%) within 16 km, and shrubs (39%), grassland (26%) and trees (23%) within 80 km.

3 km
418 m
16 km
1,570 m
80 km
4,755 m
treesshrubsgrasslandcroplandartificial surfaceswetland
September weather nearby: Isiolo 35 km · Maua 38 km · Chuka 42 km · Nanyuki 65 km · Embu 69 km · Kerugoya 74 km · Karatina 83 km · Wanguru 88 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 Meru (0.0463°, 37.6559°, elevation 1,579 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).