Busia weather in September
In September, Busia sees average daytime highs of 27°C and overnight lows near 18°C, with 181 mm of rain across 25.5 wet days and about 12 hours of daylight. It is the 5th-warmest and 6th-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 14% 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 Busia's 4th-clearest and 8th-windiest month. For the whole year in context, see Busia's year-round climate.
- Daytime high
- 27°
- 5th warmest
- Overnight low
- 18°
- 3rd coldest
- Rainfall
- 181 mm
- 25.5 wet days
- Daylight
- 12 hours
- 6:38 AM – 6:38 PM
- Cloud cover
- 66%
- 4th clearest
- Wind
- 5 km/h
- 8th windiest
- Solar energy
- 5.93 kWh/m²
- Travel score
- 4.1
- out of 10
Busia is town in Western Kenya.
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Temperature in September
Day-to-day highs hold fairly steady near 27°C through the month.
A typical September day in Busia reaches about 27°C in the afternoon and slips back to 18°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 26°C and 29°C. Set against its neighbours, September runs on par with August and on par with October.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 |
| Avg low (°C) | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 27 | 18 |
| 2 | 27 | 18 |
| 3 | 27 | 18 |
| 4 | 27 | 18 |
| 5 | 27 | 18 |
| 6 | 27 | 18 |
| 7 | 27 | 18 |
| 8 | 27 | 18 |
| 9 | 27 | 18 |
| 10 | 27 | 18 |
| 11 | 27 | 18 |
| 12 | 27 | 18 |
| 13 | 27 | 18 |
| 14 | 28 | 18 |
| 15 | 28 | 18 |
| 16 | 28 | 18 |
| 17 | 28 | 18 |
| 18 | 28 | 18 |
| 19 | 28 | 18 |
| 20 | 28 | 18 |
| 21 | 28 | 18 |
| 22 | 28 | 18 |
| 23 | 28 | 18 |
| 24 | 28 | 18 |
| 25 | 28 | 18 |
| 26 | 28 | 18 |
| 27 | 28 | 18 |
| 28 | 28 | 18 |
| 29 | 28 | 18 |
| 30 | 28 | 18 |
Busia weather by month
How September compares with the rest of the year at a glance. September is the 5th-warmest and 6th-wettest month here — the current month is highlighted below.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 29° / 18° | 112 | 14.9 | 12 | 5.1 |
| Feb | 29° / 19° | 109 | 14.7 | 12 | 4.5 |
| Mar | 29° / 19° | 216 | 22.7 | 12 | 4.1 |
| Apr | 27° / 19° | 291 | 27.5 | 12 | 3.6 |
| May | 27° / 19° | 276 | 29 | 12 | 3.7 |
| Jun | 27° / 18° | 177 | 24.3 | 12 | 4.3 |
| Jul | 27° / 17° | 134 | 20.9 | 12 | 4.9 |
| Aug | 27° / 18° | 168 | 23.9 | 12 | 4.5 |
| Sep | 27° / 18° | 181 | 25.5 | 12 | 4.1 |
| Oct | 27° / 18° | 220 | 28 | 12 | 3.7 |
| Nov | 27° / 18° | 210 | 24.1 | 12 | 4.1 |
| Dec | 28° / 18° | 142 | 19.2 | 12 | 5.0 |
Cloud cover in September
The sky is clear or mostly clear about 14% of the time in September.
Beyond those clear spells, partly cloudy skies cover about 28% of September, with mostly cloudy or overcast conditions the remaining 58%.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 44 | 44 | 45 | 45 | 45 | 45 | 46 | 46 | 47 | 47 | 48 | 48 | 47 | 47 | 46 | 46 | 45 | 43 | 43 | 42 | 40 | 39 | 37 | 36 | 35 | 33 | 32 | 31 | 30 | 29 |
| Cloudier (%) | 56 | 56 | 55 | 55 | 55 | 55 | 54 | 54 | 53 | 53 | 52 | 52 | 53 | 53 | 54 | 54 | 55 | 57 | 57 | 58 | 60 | 61 | 63 | 64 | 65 | 67 | 68 | 69 | 70 | 71 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 44 | 56 |
| 2 | 44 | 56 |
| 3 | 45 | 55 |
| 4 | 45 | 55 |
| 5 | 45 | 55 |
| 6 | 45 | 55 |
| 7 | 46 | 54 |
| 8 | 46 | 54 |
| 9 | 47 | 53 |
| 10 | 47 | 53 |
| 11 | 48 | 52 |
| 12 | 48 | 52 |
| 13 | 47 | 53 |
| 14 | 47 | 53 |
| 15 | 46 | 54 |
| 16 | 46 | 54 |
| 17 | 45 | 55 |
| 18 | 43 | 57 |
| 19 | 43 | 57 |
| 20 | 42 | 58 |
| 21 | 40 | 60 |
| 22 | 39 | 61 |
| 23 | 37 | 63 |
| 24 | 36 | 64 |
| 25 | 35 | 65 |
| 26 | 33 | 67 |
| 27 | 32 | 68 |
| 28 | 31 | 69 |
| 29 | 30 | 70 |
| 30 | 29 | 71 |
Chance of precipitation in September
Busia gets around 181 mm of rain over 25.5 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 85% and peaks near 89% on the wettest days.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain chance (%) | 83 | 83 | 84 | 84 | 84 | 84 | 84 | 84 | 84 | 84 | 84 | 84 | 84 | 84 | 84 | 84 | 84 | 84 | 84 | 85 | 85 | 86 | 86 | 87 | 87 | 88 | 88 | 89 | 89 | 89 |
| Rain chance (%) | |
|---|---|
| 1 | 83 |
| 2 | 83 |
| 3 | 84 |
| 4 | 84 |
| 5 | 84 |
| 6 | 84 |
| 7 | 84 |
| 8 | 84 |
| 9 | 84 |
| 10 | 84 |
| 11 | 84 |
| 12 | 84 |
| 13 | 84 |
| 14 | 84 |
| 15 | 84 |
| 16 | 84 |
| 17 | 84 |
| 18 | 84 |
| 19 | 84 |
| 20 | 85 |
| 21 | 85 |
| 22 | 86 |
| 23 | 86 |
| 24 | 87 |
| 25 | 87 |
| 26 | 88 |
| 27 | 88 |
| 28 | 89 |
| 29 | 89 |
| 30 | 89 |
Humidity in September
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 54% of days. Sticky, muggy-or-worse air turns up on roughly 46% of them.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Humid (%) | 70 | 69 | 68 | 67 | 66 | 65 | 64 | 63 | 62 | 61 | 60 | 59 | 58 | 56 | 55 | 54 | 53 | 52 | 51 | 49 | 48 | 47 | 46 | 45 | 43 | 42 | 41 | 40 | 39 | 38 |
| Muggy (%) | 30 | 31 | 32 | 33 | 34 | 35 | 36 | 37 | 38 | 39 | 40 | 41 | 42 | 44 | 45 | 46 | 47 | 48 | 49 | 51 | 52 | 53 | 54 | 55 | 57 | 58 | 59 | 60 | 61 | 62 |
| Humid (%) | Muggy (%) | |
|---|---|---|
| 1 | 70 | 30 |
| 2 | 69 | 31 |
| 3 | 68 | 32 |
| 4 | 67 | 33 |
| 5 | 66 | 34 |
| 6 | 65 | 35 |
| 7 | 64 | 36 |
| 8 | 63 | 37 |
| 9 | 62 | 38 |
| 10 | 61 | 39 |
| 11 | 60 | 40 |
| 12 | 59 | 41 |
| 13 | 58 | 42 |
| 14 | 56 | 44 |
| 15 | 55 | 45 |
| 16 | 54 | 46 |
| 17 | 53 | 47 |
| 18 | 52 | 48 |
| 19 | 51 | 49 |
| 20 | 49 | 51 |
| 21 | 48 | 52 |
| 22 | 47 | 53 |
| 23 | 46 | 54 |
| 24 | 45 | 55 |
| 25 | 43 | 57 |
| 26 | 42 | 58 |
| 27 | 41 | 59 |
| 28 | 40 | 60 |
| 29 | 39 | 61 |
| 30 | 38 | 62 |
Wind in September
Winds average 5 km/h in September.
Across September, daily wind ranges from about 5 km/h on the calmest days to 5 km/h at its breeziest. It stays fairly steady from day to day.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (km/h) | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 |
| Feels | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm |
| Wind speed (km/h) | Feels | |
|---|---|---|
| 1 | 5 | calm |
| 2 | 5 | calm |
| 3 | 5 | calm |
| 4 | 5 | calm |
| 5 | 5 | calm |
| 6 | 5 | calm |
| 7 | 5 | calm |
| 8 | 5 | calm |
| 9 | 5 | calm |
| 10 | 5 | calm |
| 11 | 5 | calm |
| 12 | 5 | calm |
| 13 | 5 | calm |
| 14 | 5 | calm |
| 15 | 5 | calm |
| 16 | 5 | calm |
| 17 | 5 | calm |
| 18 | 5 | calm |
| 19 | 5 | calm |
| 20 | 5 | calm |
| 21 | 5 | calm |
| 22 | 5 | calm |
| 23 | 5 | calm |
| 24 | 5 | calm |
| 25 | 5 | calm |
| 26 | 5 | calm |
| 27 | 5 | calm |
| 28 | 5 | calm |
| 29 | 5 | calm |
| 30 | 5 | calm |
Sunrise & sunset in September
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 6:43 AM to 6:33 AM, and sunset from 6:44 PM to 6:33 PM.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 |
| Sunrise (AM) | 6:43 | 6:43 | 6:42 | 6:42 | 6:42 | 6:41 | 6:41 | 6:41 | 6:40 | 6:40 | 6:40 | 6:39 | 6:39 | 6:39 | 6:38 | 6:38 | 6:37 | 6:37 | 6:37 | 6:36 | 6:36 | 6:36 | 6:35 | 6:35 | 6:35 | 6:34 | 6:34 | 6:34 | 6:33 | 6:33 |
| Sunset (PM) | 6:44 | 6:43 | 6:43 | 6:42 | 6:42 | 6:42 | 6:41 | 6:41 | 6:41 | 6:40 | 6:40 | 6:39 | 6:39 | 6:39 | 6:38 | 6:38 | 6:38 | 6:37 | 6:37 | 6:36 | 6:36 | 6:36 | 6:35 | 6:35 | 6:35 | 6:34 | 6:34 | 6:33 | 6:33 | 6:33 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 12.0 | 6:43 | 6:44 |
| 2 | 12.0 | 6:43 | 6:43 |
| 3 | 12.0 | 6:42 | 6:43 |
| 4 | 12.0 | 6:42 | 6:42 |
| 5 | 12.0 | 6:42 | 6:42 |
| 6 | 12.0 | 6:41 | 6:42 |
| 7 | 12.0 | 6:41 | 6:41 |
| 8 | 12.0 | 6:41 | 6:41 |
| 9 | 12.0 | 6:40 | 6:41 |
| 10 | 12.0 | 6:40 | 6:40 |
| 11 | 12.0 | 6:40 | 6:40 |
| 12 | 12.0 | 6:39 | 6:39 |
| 13 | 12.0 | 6:39 | 6:39 |
| 14 | 12.0 | 6:39 | 6:39 |
| 15 | 12.0 | 6:38 | 6:38 |
| 16 | 12.0 | 6:38 | 6:38 |
| 17 | 12.0 | 6:37 | 6:38 |
| 18 | 12.0 | 6:37 | 6:37 |
| 19 | 12.0 | 6:37 | 6:37 |
| 20 | 12.0 | 6:36 | 6:36 |
| 21 | 12.0 | 6:36 | 6:36 |
| 22 | 12.0 | 6:36 | 6:36 |
| 23 | 12.0 | 6:35 | 6:35 |
| 24 | 12.0 | 6:35 | 6:35 |
| 25 | 12.0 | 6:35 | 6:35 |
| 26 | 12.0 | 6:34 | 6:34 |
| 27 | 12.0 | 6:34 | 6:34 |
| 28 | 12.0 | 6:34 | 6:33 |
| 29 | 12.0 | 6:33 | 6:33 |
| 30 | 12.0 | 6:33 | 6:33 |
Solar energy in September
Average shortwave solar energy reaching the ground each day in September, about 5.93 kWh/m².
For context, solar energy here swings from a low near 5.07 kWh/m² to a high of 6.34 kWh/m² in February across the year — September's 5.93 kWh/m² falls in the middle.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 5.7 | 5.7 | 5.7 | 5.7 | 5.8 | 5.8 | 5.8 | 5.8 | 5.8 | 5.9 | 5.9 | 5.9 | 5.9 | 6.0 | 6.0 | 6.0 | 6.0 | 6.0 | 6.0 | 6.0 | 6.0 | 6.0 | 6.0 | 6.0 | 6.0 | 6.0 | 6.0 | 6.0 | 6.0 | 5.9 |
| Level | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Bright | Bright | Bright | Bright | Bright |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 5.7 | Bright |
| 2 | 5.7 | Bright |
| 3 | 5.7 | Bright |
| 4 | 5.7 | Bright |
| 5 | 5.8 | Bright |
| 6 | 5.8 | Bright |
| 7 | 5.8 | Bright |
| 8 | 5.8 | Bright |
| 9 | 5.8 | Bright |
| 10 | 5.9 | Bright |
| 11 | 5.9 | Bright |
| 12 | 5.9 | Bright |
| 13 | 5.9 | Bright |
| 14 | 6.0 | Bright |
| 15 | 6.0 | Bright |
| 16 | 6.0 | Bright |
| 17 | 6.0 | Intense |
| 18 | 6.0 | Intense |
| 19 | 6.0 | Intense |
| 20 | 6.0 | Intense |
| 21 | 6.0 | Intense |
| 22 | 6.0 | Intense |
| 23 | 6.0 | Intense |
| 24 | 6.0 | Intense |
| 25 | 6.0 | Intense |
| 26 | 6.0 | Bright |
| 27 | 6.0 | Bright |
| 28 | 6.0 | Bright |
| 29 | 6.0 | Bright |
| 30 | 5.9 | Bright |
Is September a good time to visit Busia?
Our two travel scores rate September for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
September is a reasonable time to visit Busia for sightseeing.
What to pack for Busia in September
From September's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In September, Busia sees daytime highs around 27°C and nights near 18°C. Pack light clothes and rain gear. Worth having: sun protection. About 26 days see rain.
UV index in Busia in September
Clear-sky midday UV in September peaks around 12 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Busia 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 (extreme).
The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 14 | 14 | 15 | 14 | 12 | 10 | 11 | 12 | 12 | 14 | 12 | 11 |
| Level | Extreme | Extreme | Extreme | Extreme | Extreme | Very high | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 14 | Extreme |
| Feb | 14 | Extreme |
| Mar | 15 | Extreme |
| Apr | 14 | Extreme |
| May | 12 | Extreme |
| Jun | 10 | Very high |
| Jul | 11 | Extreme |
| Aug | 12 | Extreme |
| Sep | 12 | Extreme |
| Oct | 14 | Extreme |
| Nov | 12 | Extreme |
| Dec | 11 | Extreme |
Air quality in Busia in September
Average fine-particle pollution (PM2.5) through the year — so you can see where September falls, not just the annual average.
Air quality in Busia is worst in January — around 60 µg/m³ PM2.5 (unhealthy), and holds fairly steady the rest of the year.
Modeled monthly averages (CAMS reanalysis, 2015–2024).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 60 | 54 | 45 | 38 | 41 | 48 | 52 | 47 | 43 | 45 | 50 | 54 |
| Level | Unhealthy | Poor | Poor | Poor | Poor | Poor | Poor | Poor | Poor | Poor | Poor | Poor |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 60 | Unhealthy |
| Feb | 54 | Poor |
| Mar | 45 | Poor |
| Apr | 38 | Poor |
| May | 41 | Poor |
| Jun | 48 | Poor |
| Jul | 52 | Poor |
| Aug | 47 | Poor |
| Sep | 43 | Poor |
| Oct | 45 | Poor |
| Nov | 50 | Poor |
| Dec | 54 | Poor |
Where is Busia?
Busia sits at 0.5°N, 34.1°E, 1,222 m above sea level, in Kenya. The nearest listed city is Busia, 2.0 km away.
Topography around Busia
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Busia.
Within 3 km, the terrain around Busia has only modest variations in elevation — a maximum elevation change of 79 m around an average of 1,203 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 362 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,664 m.
The land around Busia is covered by shrubs (31%), artificial surfaces (25%) and trees (23%) within 3 km, shrubs (43%) within 16 km, and shrubs (29%), cropland (22%) and trees (21%) within 80 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
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 Busia (0.4601°, 34.1117°, elevation 1,222 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).