Mwala weather in September

In September, Mwala sees average daytime highs of 27°C and overnight lows near 16°C, with 3 mm of rain across 0.7 wet days and about 12 hours of daylight. It is the 5th-warmest and 10th-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 26% 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 Mwala's 5th-clearest and 1st-windiest month. For the whole year in context, see Mwala's year-round climate.

Daytime high
27°
5th warmest
Overnight low
16°
4th coldest
Rainfall
3 mm
0.7 wet days
Daylight
12 hours
6:25 AM – 6:24 PM
Cloud cover
58%
5th clearest
Wind
10 km/h
1st windiest
Solar energy
5.78 kWh/m²
Travel score
7.8
out of 10

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 Mwala reaches about 27°C in the afternoon and slips back to 16°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 24°C and 29°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)
12616
22616
32616
42616
52616
62616
72616
82616
92616
102616
112716
122716
132716
142716
152716
162716
172716
182716
192716
202716
212716
222817
232817
242817
252817
262817
272817
282817
292817
302817

Mwala weather by month

How September compares with the rest of the year at a glance. September is the 5th-warmest and 10th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan27° / 17°409.312.16.8
Feb29° / 18°246.4126.1
Mar28° / 19°7014.3125.4
Apr27° / 19°10920.5124.9
May26° / 18°4010.511.96.6
Jun25° / 16°61.511.97.7
Jul24° / 15°20.411.97.9
Aug25° / 16°30.8127.8
Sep27° / 16°30.7127.8
Oct28° / 18°338126.7
Nov26° / 18°15522.212.14.8
Dec26° / 17°8017.612.15.6

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 26% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 21% of September, with mostly cloudy or overcast conditions the remaining 53%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
12872
22971
33169
43169
53367
63367
73664
83862
93961
104159
114456
124555
134654
144852
155050
165149
175347
185446
195545
205644
215743
225743
235842
245842
255842
265842
275941
285842
295842
305842

Chance of precipitation in September

Any precipitation

Mwala gets around 3 mm of rain over 0.7 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 3% and peaks near 6% on the wettest days.

0%10%20%30%151015202530
Rain chance (%)
12
22
32
42
52
62
72
82
92
102
112
122
132
142
152
162
173
183
193
203
213
223
233
244
254
264
275
285
296
306

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 52% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)
156431
256431
356431
456431
555441
655441
755441
854451
954451
1054451
1154451
1254451
1354451
1454451
1554451
1654451
1753452
1853452
1953452
2052462
2152462
2251463
2350473
2449473
2548484
2646494
2745505
2843525
2942526
3040537

Wind in September

Winds average 10 km/h in September, the windiest month of the year.

Across September, daily wind ranges from about 10 km/h on the calmest days to 11 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
110calm
210calm
310calm
410calm
510calm
610calm
710calm
810calm
910calm
1010calm
1110calm
1210calm
1310calm
1410calm
1511calm
1611calm
1711calm
1811calm
1911calm
2011calm
2111calm
2211calm
2311calm
2411calm
2511calm
2611calm
2711calm
2811calm
2911calm
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 6:31 AM to 6:19 AM, and sunset from 6:29 PM to 6:20 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.06:316:29
212.06:306:29
312.06:306:29
412.06:306:28
512.06:296:28
612.06:296:28
712.06:286:27
812.06:286:27
912.06:286:27
1012.06:276:26
1112.06:276:26
1212.06:266:26
1312.06:266:25
1412.06:266:25
1512.06:256:25
1612.06:256:24
1712.06:246:24
1812.06:246:24
1912.06:236:23
2012.06:236:23
2112.06:236:23
2212.06:226:22
2312.06:226:22
2412.06:216:22
2512.06:216:21
2612.06:216:21
2712.06:206:21
2812.06:206:20
2912.06:206:20
3012.06:196:20

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.78 kWh/m².

For context, solar energy here swings from a low near 4.17 kWh/m² to a high of 6.71 kWh/m² in February across the year — September's 5.78 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
105.5Bright
115.5Bright
125.6Bright
135.7Bright
145.7Bright
155.8Bright
165.9Bright
175.9Bright
186.0Bright
196.0Intense
206.0Intense
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 Mwala

In seasonPeak

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

Mwala's rainy season runs April–April, 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 Mwala?

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

7.8
Sightseeing
2nd-best month of the year
7.9
Beach & pool
1st-best month of the year

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

What to pack for Mwala in September

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

In September, Mwala sees daytime highs around 27°C and nights near 16°C. Worth packing: light clothes and sun protection.

light clothessun protection

UV index in Mwala 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 Mwala peaks around March 16 at about 16 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 17 at about 10 (extreme).

The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeMar 16UV 16Jun 17UV 10
UV index (midday)Level
Jan15Extreme
Feb15Extreme
Mar16Extreme
Apr15Extreme
May12Extreme
Jun10Extreme
Jul11Extreme
Aug12Extreme
Sep14Extreme
Oct14Extreme
Nov13Extreme
Dec13Extreme

Air quality in Mwala 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 Mwala is worst in December — around 29 µg/m³ PM2.5 (moderate), about 2.3× the cleanest month (October, 13 µg/m³).

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecModerateDec 2129 µg/m³Oct 913 µg/m³
PM2.5 (µg/m³)Level
Jan28Moderate
Feb24Moderate
Mar23Moderate
Apr25Moderate
May23Moderate
Jun25Moderate
Jul22Moderate
Aug17Moderate
Sep13Moderate
Oct13Moderate
Nov22Moderate
Dec29Moderate
Location & terrain

Where is Mwala?

Mwala sits at 1.4°S, 37.5°E, 1,256 m above sea level, in Kenya. The nearest listed city is Machakos, 28 km away.

Topography around Mwala

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

Within 3 km, the terrain around Mwala has only modest variations in elevation — a maximum elevation change of 140 m around an average of 1,247 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 806 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,520 m.

The land around Mwala is covered by cropland (50%) and shrubs (27%) within 3 km, shrubs (41%) and cropland (34%) within 16 km, and shrubs (42%), grassland (25%) and cropland (20%) within 80 km.

3 km
140 m
16 km
806 m
80 km
1,520 m
treesshrubsgrasslandcroplandartificial surfaceswater
September weather nearby: Machakos 28 km · Kinoi 35 km · Wote 51 km · Githunguri 52 km · Makueni Boma 54 km · Athi River 54 km · Thika 56 km · Juja 56 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 Mwala (-1.3525°, 37.4548°, elevation 1,256 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).