Yei in Fall
In fall (September, October and November), Yei sees average daytime highs around 28°C and overnight lows near 19°C, with 526 mm of rain over about 66 wet days across the season. It is the 3rd-warmest season and the wettest season of the year.
Across fall, daytime highs hold fairly steady around 28°C. The sky is clear or mostly clear about 14% of the time across fall, and the air most often feels muggy.
Fall is Yei's 3rd-best season to visit on our travel score. For the whole year in context, see Yei's year-round climate.
- Avg daytime high
- 28°C
- 3rd-warmest season
- Avg overnight low
- 19°C
- Rainfall
- 526 mm
- 66 wet days
- Avg wind
- 6 km/h
- Travel score
- 4.2
- 3rd-best season
- Months
- Sep · Oct · Nov
Temperature in Yei in Fall
Across fall, daytime highs hold fairly steady around 28°C.
A typical fall day in Yei reaches about 28°C and drops to 19°C overnight. The warmest of the three months is November, the coolest September.
How fall really feels in Yei
Once humidity and wind are folded in, fall brings about 0 days that feel above 32°C and 0 that feel at or below 0°C.
fall sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.
Yei weather by month
How the three fall months (September, October and November) compare with the rest of the year — the season's months are highlighted.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 33° / 21° | 10 | 2 | 11.8 | 4.5 |
| Feb | 34° / 22° | 15 | 3.5 | 11.9 | 3.7 |
| Mar | 33° / 22° | 67 | 12.1 | 12 | 3.4 |
| Apr | 30° / 21° | 146 | 19.7 | 12.1 | 3.5 |
| May | 29° / 20° | 155 | 21.6 | 12.2 | 4.0 |
| Jun | 28° / 19° | 143 | 21.8 | 12.2 | 4.4 |
| Jul | 27° / 19° | 183 | 24.6 | 12.2 | 4.3 |
| Aug | 27° / 19° | 199 | 26.9 | 12.1 | 4.0 |
| Sep | 28° / 19° | 178 | 24.4 | 12 | 4.1 |
| Oct | 28° / 19° | 225 | 25.9 | 11.9 | 3.8 |
| Nov | 29° / 20° | 123 | 16 | 11.8 | 4.6 |
| Dec | 31° / 20° | 21 | 4 | 11.8 | 5.3 |
Cloud cover in Fall
The sky is clear or mostly clear about 14% of the time across fall.
Chance of precipitation in Fall
Yei gets around 526 mm of rain over 66 wet days across fall. The line is the day-by-day chance of measurable precipitation.
Humidity in Fall
Most of fall feels muggy — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Fall
Winds average 6 km/h across fall.
Sunrise & sunset in Fall
Daylight runs from about 12 h 06 min in early September to 11 h 48 min by late November. The lit band spans sunrise to sunset each day.
Solar energy in Fall
Average shortwave solar energy reaching the ground each day across fall, about 5.5 kWh/m².
Hazard calendar for Yei
In fall, Yei overlaps its rainy season season. The full year is below, with each hazard's peak months called out.
Yei's rainy season runs April–November, when most of the year's rain falls.
Is fall a good time to visit Yei?
Our two travel scores rate fall for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
fall is a reasonable time to visit Yei for sightseeing.
What to pack for Yei in Fall
From fall's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In fall, Yei sees daytime highs around 28°C and nights near 19°C. Pack light clothes and rain gear. Worth having: sun protection. About 66 days see rain.
UV index in Yei in Fall
Clear-sky midday UV across fall averages 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 Yei peaks around March 17 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 15 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) | 11 | 14 | 15 | 14 | 12 | 10 | 11 | 12 | 13 | 13 | 10 | 10 |
| Level | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Very high |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 11 | Extreme |
| Feb | 14 | Extreme |
| Mar | 15 | Extreme |
| Apr | 14 | Extreme |
| May | 12 | Extreme |
| Jun | 10 | Extreme |
| Jul | 11 | Extreme |
| Aug | 12 | Extreme |
| Sep | 13 | Extreme |
| Oct | 13 | Extreme |
| Nov | 10 | Extreme |
| Dec | 10 | Very high |
Air quality in Yei in Fall
Average fine-particle pollution (PM2.5) through the year — so you can see where fall falls, not just the annual average.
Air quality in Yei is worst in January — around 101 µg/m³ PM2.5 (unhealthy), about 7.6× the cleanest month (October, 13 µg/m³).
Modeled monthly averages (CAMS reanalysis, 2015–2024).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 101 | 55 | 27 | 15 | 14 | 21 | 22 | 17 | 14 | 13 | 18 | 49 |
| Level | Unhealthy | Poor | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Poor |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 101 | Unhealthy |
| Feb | 55 | Poor |
| Mar | 27 | Moderate |
| Apr | 15 | Moderate |
| May | 14 | Moderate |
| Jun | 21 | Moderate |
| Jul | 22 | Moderate |
| Aug | 17 | Moderate |
| Sep | 14 | Moderate |
| Oct | 13 | Moderate |
| Nov | 18 | Moderate |
| Dec | 49 | Poor |
Where is Yei?
Yei sits at 4.1°N, 30.7°E, 836 m above sea level, in South Sudan. The nearest listed city is Koboko, 82 km away.
Topography around Yei
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Yei.
Within 3 km, the terrain around Yei has only modest variations in elevation — a maximum elevation change of 62 m around an average of 824 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 156 m; within 80 km, large variations in elevation — a maximum elevation change of 1,060 m.
The land around Yei is covered by shrubs (46%) and trees (21%) within 3 km, shrubs (51%) and grassland (34%) within 16 km, and shrubs (50%) and trees (34%) within 80 km.
South Sudan travel facts
- Travel advisory
- Level 4
- Do Not Travel
- Prices
- ≈ 6% of US
- price level, 2021
- GDP per capita
- $1,080
- 2015
- Happiness
- 2.8 / 10
- World Happiness, 2019
- Homicide rate
- 14
- per 100k, 2012
- Road deaths
- 36.7
- per 100k/yr, 2019
- Income group
- Low
- World Bank
- 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 Yei (4.0944°, 30.6764°, elevation 836 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.