Siaya weather in August

In August, Siaya sees average daytime highs of 26°C and overnight lows near 19°C, with 124 mm of rain across 22.6 wet days and about 12 hours of daylight. It is the 7th-warmest and 10th-wettest month of the year here.

Day-to-day highs hold fairly steady near 26°C through the month. The sky is clear or mostly clear about 19% of the time in August, and the air most often feels humid.

Daylight stretches from about 12 hours at the start of August to 12 hours by month's end. Set against the rest of the year, August is Siaya's 4th-clearest and 4th-windiest month. For the whole year in context, see Siaya's year-round climate.

Daytime high
26°
7th warmest
Overnight low
19°
2nd coldest
Rainfall
124 mm
22.6 wet days
Daylight
12 hours
6:47 AM – 6:47 PM
Cloud cover
62%
4th clearest
Wind
7 km/h
4th windiest
Solar energy
5.91 kWh/m²
Travel score
4.8
out of 10

Siaya is town in Siaya County, Kenya.

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

Temperature in August

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 26°C through the month.

A typical August day in Siaya reaches about 26°C in the afternoon and slips back to 19°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 25°C and 28°C. Set against its neighbours, August runs on par with July and on par with September.

15°20°25°30°151015202531
Avg high (°C)Avg low (°C)
12619
22619
32619
42619
52619
62619
72619
82619
92619
102619
112619
122619
132619
142619
152619
162619
172619
182619
192619
202619
212619
222619
232619
242719
252719
262719
272719
282719
292719
302719
312719

Siaya weather by month

How August compares with the rest of the year at a glance. August is the 7th-warmest and 10th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan27° / 20°13718.3125.3
Feb28° / 20°10715.2125.1
Mar27° / 20°19822.8124.6
Apr26° / 20°28027.5123.7
May26° / 20°23128.4123.9
Jun26° / 19°12923.4124.5
Jul26° / 19°9919.9125.1
Aug26° / 19°12422.6124.8
Sep27° / 19°13424.4124.3
Oct27° / 20°21228.1123.8
Nov26° / 19°23227.3123.8
Dec27° / 19°18323.1124.7

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 19% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 27% of August, with mostly cloudy or overcast conditions the remaining 54%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14357
24357
34357
44357
54357
64456
74456
84456
94555
104555
114555
124555
134555
144555
154555
164555
174753
184753
194753
204654
214654
224753
234753
244753
254852
264852
274753
284753
294753
304753
314852

Chance of precipitation in August

Any precipitation

Siaya gets around 124 mm of rain over 22.6 wet days in August. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 72% and peaks near 77% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%151015202531
Rain chance (%)
166
266
367
467
568
669
769
870
971
1071
1171
1271
1372
1472
1572
1672
1773
1873
1973
2074
2174
2274
2375
2475
2575
2675
2776
2876
2977
3077
3177

Humidity in August

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, August lands in the humid band about 91% of days. Sticky, muggy-or-worse air turns up on roughly 7% of them.

0%25%50%75%100%151015202531
Comfortable (%)Humid (%)Muggy (%)
12908
22917
32917
42917
52917
62926
72926
82926
92926
102926
112926
122926
132917
142917
152917
162908
172908
182908
192908
202908
212908
222908
232908
242908
252908
262908
272908
282908
292908
302908
312908

Wind in August

Winds average 7 km/h in August.

Across August, 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.

0246810151015202531
Wind speed (km/h)Feels
16calm
26calm
36calm
46calm
56calm
66calm
76calm
86calm
96calm
106calm
116calm
126calm
136calm
147calm
157calm
167calm
177calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm
317calm

Sunrise & sunset in August

DaylightNight

Daylight runs from about 12 hours at the start of August to 12 hours by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 0 minutes over August. Sunrise moves from 6:49 AM to 6:43 AM, and sunset from 6:49 PM to 6:43 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.06:496:49
212.06:496:49
312.06:496:49
412.06:496:49
512.06:496:49
612.06:486:49
712.06:486:48
812.06:486:48
912.06:486:48
1012.06:486:48
1112.06:486:48
1212.06:486:48
1312.06:476:48
1412.06:476:47
1512.06:476:47
1612.06:476:47
1712.06:476:47
1812.06:466:47
1912.06:466:46
2012.06:466:46
2112.06:466:46
2212.06:456:46
2312.06:456:45
2412.06:456:45
2512.06:456:45
2612.06:446:44
2712.06:446:44
2812.06:446:44
2912.06:436:44
3012.06:436:43
3112.06:436:43

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 5.91 kWh/m².

For context, solar energy here swings from a low near 5.49 kWh/m² to a high of 6.74 kWh/m² in February across the year — August's 5.91 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.6Bright
25.7Bright
35.7Bright
45.7Bright
55.7Bright
65.7Bright
75.7Bright
85.8Bright
95.8Bright
105.8Bright
115.8Bright
125.8Bright
135.9Bright
145.9Bright
155.9Bright
165.9Bright
175.9Bright
186.0Bright
196.0Bright
206.0Bright
216.0Intense
226.0Intense
236.0Intense
246.0Intense
256.0Intense
266.0Intense
276.1Intense
286.1Intense
296.1Intense
306.1Intense
316.1Intense
Planning a trip in August

Is August a good time to visit Siaya?

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

4.8
Sightseeing
4th-best month of the year
4.7
Beach & pool
5th-best month of the year

August is a reasonable time to visit Siaya for sightseeing.

What to pack for Siaya in August

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

In August, Siaya sees daytime highs around 26°C and nights near 19°C. Pack rain gear. Worth having: light clothes and sun protection. About 23 days see rain.

rain gearlight clothessun protection

UV index in Siaya in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August peaks around 11 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Siaya peaks around March 16 at about 16 (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 16UV 16Jun 18UV 10
UV index (midday)Level
Jan15Extreme
Feb14Extreme
Mar16Extreme
Apr14Extreme
May11Extreme
Jun10Very high
Jul11Extreme
Aug11Extreme
Sep12Extreme
Oct14Extreme
Nov12Extreme
Dec11Extreme

Air quality in Siaya in August

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where August falls, not just the annual average.

Air quality in Siaya is worst in June — around 78 µg/m³ PM2.5 (unhealthy), and holds fairly steady the rest of the year.

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

020406080JanFebMarAprMayJunJulAugSepOctNovDecUnhealthyJun 2177 µg/m³Apr 967 µg/m³
PM2.5 (µg/m³)Level
Jan74Unhealthy
Feb68Unhealthy
Mar67Unhealthy
Apr67Unhealthy
May69Unhealthy
Jun78Unhealthy
Jul76Unhealthy
Aug74Unhealthy
Sep71Unhealthy
Oct73Unhealthy
Nov77Unhealthy
Dec76Unhealthy
Location & terrain

Where is Siaya?

Siaya sits at 0.1°N, 34.3°E, 1,321 m above sea level, in Kenya. The nearest listed city is Bondo, 18 km away.

Topography around Siaya

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

Within 3 km, the terrain around Siaya has only modest variations in elevation — a maximum elevation change of 156 m around an average of 1,292 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 310 m; within 80 km, large variations in elevation — a maximum elevation change of 1,175 m.

The land around Siaya is covered by shrubs (37%) and grassland (29%) within 3 km, shrubs (42%) and grassland (35%) within 16 km, and water (29%) and shrubs (27%) within 80 km.

3 km
156 m
16 km
310 m
80 km
1,175 m
treesshrubsgrasslandcroplandartificial surfaceswaterwetland
August weather nearby: Bondo 18 km · Khwisero 36 km · Lugulu 37 km · Mumias 38 km · Mbale 48 km · Busia 49 km · Busia 50 km · Kisumu 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 Siaya (0.0607°, 34.2881°, elevation 1,321 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).