Homa Bay weather in September

In September, Homa Bay sees average daytime highs of 27°C and overnight lows near 19°C, with 90 mm of rain across 18.3 wet days and about 12 hours of daylight. It is the 4th-warmest and 8th-wettest month of the year here.

Day-to-day highs hold fairly steady near 27°C through the month. The sky is clear or mostly clear about 25% of the time in September, and the air most often feels humid.

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 Homa Bay's 4th-clearest and 4th-windiest month. For the whole year in context, see Homa Bay's year-round climate.

Daytime high
27°
4th warmest
Overnight low
19°
6th coldest
Rainfall
90 mm
18.3 wet days
Daylight
12 hours
6:37 AM – 6:36 PM
Cloud cover
60%
4th clearest
Wind
6 km/h
4th windiest
Solar energy
6.44 kWh/m²
Travel score
5.2
out of 10

Homa Bay is city in Kenya.

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

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 27°C through the month.

A typical September day in Homa Bay reaches about 27°C in the afternoon and slips back to 19°C overnight — a 8°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 on par with August and on par with October.

15°20°25°30°151015202530
Avg high (°C)Avg low (°C)
12719
22719
32719
42719
52719
62719
72719
82719
92719
102719
112719
122719
132719
142719
152719
162719
172720
182720
192720
202720
212720
222720
232720
242720
252720
262720
272720
282720
292720
302720

Homa Bay weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 8th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan27° / 20°9115.3125.8
Feb28° / 20°6511.9125.5
Mar28° / 20°14719.6124.9
Apr26° / 20°24726.6123.9
May26° / 20°19625.2124.4
Jun26° / 19°8818.6125.3
Jul26° / 19°6215125.9
Aug26° / 19°8017.1125.6
Sep27° / 19°9018.3125.2
Oct27° / 20°17524.6124.3
Nov26° / 19°20525.8124.1
Dec26° / 19°14121.4124.9

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 25% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 27% of September, with mostly cloudy or overcast conditions the remaining 48%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15545
25644
35743
45743
55743
65743
75743
85842
95842
105842
115842
125743
135743
145743
155644
165545
175446
185248
195149
205050
214951
224951
234753
244555
254555
264357
274258
284159
294060
303961

Chance of precipitation in September

Any precipitation

Homa Bay gets around 90 mm of rain over 18.3 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 61% and peaks near 70% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%151015202530
Rain chance (%)
158
258
358
458
558
659
759
859
959
1059
1159
1259
1359
1459
1559
1659
1759
1860
1960
2061
2161
2262
2363
2464
2564
2665
2767
2868
2969
3070

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

Most of September feels humid — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, September lands in the humid band about 73% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
1229690
2229690
3229690
4228700
5228700
6128710
7127711
8127711
9127711
10127711
11126712
12126712
13126712
14125713
15125713
16125713
17124714
18123724
19122734
20122734
21121735
22120745
23119755
24118765
25117775
26116776
27115786
28115786
29014806
30013807

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 7 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
17calm
27calm
37calm
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 6:42 AM to 6:31 AM, and sunset from 6:42 PM to 6:32 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.06:426:42
212.06:426:41
312.06:416:41
412.06:416:41
512.06:416:40
612.06:406:40
712.06:406:40
812.06:406:39
912.06:396:39
1012.06:396:39
1112.06:396:38
1212.06:386:38
1312.06:386:37
1412.06:376:37
1512.06:376:37
1612.06:376:36
1712.06:366:36
1812.06:366:36
1912.06:356:35
2012.06:356:35
2112.06:356:35
2212.06:346:34
2312.06:346:34
2412.06:346:34
2512.06:336:33
2612.06:336:33
2712.06:326:33
2812.06:326:32
2912.06:326:32
3012.06:316:32

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 6.44 kWh/m².

For context, solar energy here swings from a low near 5.58 kWh/m² to a high of 6.74 kWh/m² in February across the year — September's 6.44 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
16.2Intense
26.2Intense
36.2Intense
46.2Intense
56.3Intense
66.3Intense
76.3Intense
86.3Intense
96.3Intense
106.4Intense
116.4Intense
126.4Intense
136.4Intense
146.5Intense
156.5Intense
166.5Intense
176.5Intense
186.5Intense
196.5Intense
206.5Intense
216.5Intense
226.5Intense
236.5Intense
246.5Intense
256.5Intense
266.5Intense
276.5Intense
286.5Intense
296.5Intense
306.4Intense
Planning a trip in September

Is September a good time to visit Homa Bay?

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

5.2
Sightseeing
6th-best month of the year
5.3
Beach & pool
5th-best month of the year

September is a reasonable time to visit Homa Bay for sightseeing.

What to pack for Homa Bay in September

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

In September, Homa Bay sees daytime highs around 27°C and nights near 19°C. Pack light clothes, rain gear and sun protection. About 18 days see rain.

light clothesrain gearsun protection

UV index in Homa Bay in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 13 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Homa Bay peaks around March 15 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 18 at about 10 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeExtremeMar 15UV 15Jun 18UV 10
UV index (midday)Level
Jan15Extreme
Feb15Extreme
Mar16Extreme
Apr14Extreme
May12Extreme
Jun10Very high
Jul11Extreme
Aug11Extreme
Sep13Extreme
Oct13Extreme
Nov12Extreme
Dec12Extreme

Air quality in Homa Bay 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 Homa Bay is worst in June — around 60 µg/m³ PM2.5 (unhealthy), and holds fairly steady the rest of the year.

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

020406080JanFebMarAprMayJunJulAugSepOctNovDecPoorUnhealthyPoorJun 2360 µg/m³Mar 1344 µg/m³
PM2.5 (µg/m³)Level
Jan50Poor
Feb45Poor
Mar44Poor
Apr47Poor
May52Poor
Jun60Unhealthy
Jul60Unhealthy
Aug54Poor
Sep50Poor
Oct49Poor
Nov51Poor
Dec50Poor
Location & terrain

Where is Homa Bay?

Homa Bay sits at 0.5°S, 34.5°E, 1,165 m above sea level, in Kenya. The nearest listed city is Awendo, 7.0 km away.

Topography around Homa Bay

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

Within 3 km, the terrain around Homa Bay has only modest variations in elevation — a maximum elevation change of 237 m around an average of 1,162 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 573 m; within 80 km, large variations in elevation — a maximum elevation change of 1,108 m.

The land around Homa Bay is covered by water (38%) within 3 km, shrubs (33%), grassland (25%) and water (21%) within 16 km, and water (28%), shrubs (22%) and trees (21%) within 80 km.

3 km
237 m
16 km
573 m
80 km
1,108 m
treesshrubsgrasslandcroplandartificial surfaceswaterwetland
September weather nearby: Awendo 7.0 km · Rongo 30 km · Oyugis 30 km · Kisii 38 km · Thomas Magena home 42 km · Ogembo 43 km · Awendo 43 km · Bondo 52 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 Homa Bay (-0.5273°, 34.4571°, elevation 1,165 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).