Mai weather in September

In September, Mai sees average daytime highs of 22°C and overnight lows near 12°C, with 30 mm of rain across 6.8 wet days and about 12 hours of daylight. It is the 8th-warmest and 11th-wettest month of the year here.

Highs climb over the month, from about 21°C in the first days to 23°C by the end. The sky is clear or mostly clear about 16% 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 Mai's 5th-clearest and 2nd-windiest month. For the whole year in context, see Mai's year-round climate.

Daytime high
22°
8th warmest
Overnight low
12°
3rd coldest
Rainfall
30 mm
6.8 wet days
Daylight
12 hours
6:28 AM – 6:28 PM
Cloud cover
64%
5th clearest
Wind
8 km/h
2nd windiest
Solar energy
5.84 kWh/m²
Travel score
7.0
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 21°C in the first days to 23°C by the end.

A typical September day in Mai reaches about 22°C in the afternoon and slips back to 12°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 20°C and 24°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)
12112
22112
32112
42112
52112
62212
72212
82212
92212
102212
112212
122212
132212
142212
152212
162212
172312
182312
192312
202312
212312
222312
232312
242312
252312
262312
272312
282312
292312
302312

Mai weather by month

How September compares with the rest of the year at a glance. September is the 8th-warmest and 11th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan25° / 13°536.712.17.5
Feb26° / 13°395.1127.4
Mar25° / 14°718.6127.1
Apr23° / 14°11717.7125.5
May22° / 14°11518.4125.2
Jun21° / 13°5412.511.95.7
Jul20° / 12°267.711.96.1
Aug21° / 12°358.3126.3
Sep22° / 12°306.8127.0
Oct23° / 13°5411126.6
Nov23° / 13°9215.7125.7
Dec24° / 13°689.412.17.1

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 16% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 24% of September, with mostly cloudy or overcast conditions the remaining 60%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
12575
22674
32773
42872
52971
63169
73268
83466
93664
103862
113862
124060
134258
144456
154456
164555
174555
184753
194753
204753
214753
224753
234852
244852
254654
264654
274654
284555
294456
304456

Chance of precipitation in September

Any precipitation

Mai gets around 30 mm of rain over 6.8 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 23% and peaks near 29% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%40%151015202530
Rain chance (%)
129
229
328
428
527
627
726
825
925
1024
1123
1223
1322
1422
1521
1621
1720
1820
1920
2020
2120
2220
2320
2420
2521
2621
2721
2822
2922
3023

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 92% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)
19010
29010
3919
4919
5919
6919
7928
8928
9928
10928
11928
12928
13928
14937
15937
16937
17937
18937
19937
20937
21937
22937
23937
24937
25928
26928
27928
28919
29919
309010

Wind in September

Winds average 8 km/h in September.

Across September, daily wind ranges from about 7 km/h on the calmest days to 8 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
148calm
158calm
168calm
178calm
188calm
198calm
208calm
218calm
228calm
238calm
248calm
258calm
268calm
278calm
288calm
298calm
308calm

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 6:23 AM, and sunset from 6:33 PM to 6:23 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.06:346:33
212.06:346:32
312.06:336:32
412.06:336:32
512.06:326:32
612.06:326:31
712.06:326:31
812.06:316:31
912.06:316:30
1012.06:316:30
1112.06:306:30
1212.06:306:29
1312.06:296:29
1412.06:296:29
1512.06:296:28
1612.06:286:28
1712.06:286:27
1812.06:276:27
1912.06:276:27
2012.06:276:26
2112.06:266:26
2212.06:266:26
2312.06:256:25
2412.06:256:25
2512.06:256:25
2612.06:246:24
2712.06:246:24
2812.06:236:24
2912.06:236:23
3012.06:236:23

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 4.22 kWh/m² to a high of 6.81 kWh/m² in February across the year — September's 5.84 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.2Bright
25.2Bright
35.2Bright
45.3Bright
55.3Bright
65.4Bright
75.4Bright
85.5Bright
95.5Bright
105.6Bright
115.7Bright
125.7Bright
135.8Bright
145.8Bright
155.9Bright
165.9Bright
176.0Bright
186.0Intense
196.0Intense
206.1Intense
216.1Intense
226.1Intense
236.1Intense
246.1Intense
256.2Intense
266.2Intense
276.2Intense
286.2Intense
296.2Intense
306.2Intense
Planning a trip in September

Is September a good time to visit Mai?

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

7.0
Sightseeing
5th-best month of the year
5.0
Beach & pool
6th-best month of the year

September is one of the better times to visit Mai for general sightseeing.

What to pack for Mai in September

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

In September, Mai sees daytime highs around 22°C and nights near 12°C. Worth packing: light clothes and sun protection. About 7 days see rain.

light clothessun protection

UV index in Mai 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 Mai peaks around March 15 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 15UV 17Jun 19UV 11
UV index (midday)Level
Jan16Extreme
Feb16Extreme
Mar17Extreme
Apr16Extreme
May12Extreme
Jun11Extreme
Jul12Extreme
Aug13Extreme
Sep14Extreme
Oct14Extreme
Nov14Extreme
Dec13Extreme

Air quality in Mai 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 Mai 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 Mai?

Mai sits at 1.0°S, 36.6°E, 1,891 m above sea level, in Kenya. The nearest listed city is Maai Mahiu, 1.0 km away.

Topography around Mai

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

Within 3 km, the terrain around Mai has significant variations in elevation — a maximum elevation change of 501 m around an average of 1,913 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 1,184 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,293 m.

The land around Mai is covered by grassland (29%), trees (22%) and cropland (20%) within 3 km, grassland (37%) and trees (32%) within 16 km, and grassland (33%), shrubs (27%) and trees (22%) within 80 km.

3 km
501 m
16 km
1,184 m
80 km
3,293 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Maai Mahiu 1.0 km · Limuru 16 km · Githunguri 23 km · Karuri 29 km · Kikuyu 31 km · Naivasha 34 km · Kiambu 35 km · Nairobi 42 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 Mai (-0.9817°, 36.5864°, elevation 1,891 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).