Climate averages 1991–2020
Yei weather
in May.
A hot, wet month: the 7th warmest and the 8th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
May is a hot month in Yei: daytime highs average 29.0°C and nights cool to about 20.5°C. By daytime temperature it is the 7th warmest of the 12 months.
Expect about 155 mm of rain on roughly 22 days, which makes May a wet month (the 8th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 18 min on an average May day.
The nearest other city in this atlas is Arua (122 km away). In May its highs average 27.4°C, 1.6°C cooler than Yei, with 70 mm of rain.
Among the 6 cities listed in South Sudan, Yei ranks 6th of 6 for the warmest May highs and 6th of 6 for the driest May (rainfall, lowest first). The mean May high of those 6 cities is 33.5°C; Yei is 4.5°C cooler than that mean.
From May to June, average highs fall by 1.1°C to 27.9°C, and monthly rainfall falls from 155 mm to 143 mm.
The annual picture
May in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Yei climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 33.3°C21.6°C | 21.6°C | 9.5 | 2.0 | 11.912 h |
| February | 34.4°C22.7°C | 22.7°C | 15 | 3.4 | 12.012 h |
| March | 33.0°C22.5°C | 22.5°C | 67 | 12.2 | 12.112 h |
| April | 30.6°C21.4°C | 21.4°C | 146 | 19.7 | 12.212 h |
| May, selected | 29.0°C20.5°C | 20.5°C | 155 | 21.7 | 12.312 h |
| June | 27.9°C19.5°C | 19.5°C | 143 | 22.0 | 12.412 h |
| July | 27.3°C18.8°C | 18.8°C | 183 | 24.6 | 12.312 h |
| August | 27.5°C18.8°C | 18.8°C | 199 | 27.2 | 12.212 h |
| September | 27.9°C19.0°C | 19.0°C | 178 | 24.4 | 12.112 h |
| October | 28.0°C19.3°C | 19.3°C | 225 | 25.9 | 12.012 h |
| November | 29.1°C19.7°C | 19.7°C | 123 | 16.2 | 11.912 h |
| December | 31.2°C20.4°C | 20.4°C | 21 | 4.0 | 11.912 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
May in nearby cities
- Arua in MayUganda · 122 kmHigh 27.4°C · Low 18.6°C · 70 mm rain
- Juba in MaySouth Sudan · 131 kmHigh 31.7°C · Low 23.3°C · 122 mm rain
- Gulu in MayUganda · 232 kmHigh 27.3°C · Low 19.1°C · 184 mm rain
- Bunia in MayDemocratic Republic of the Congo · 286 kmHigh 26.2°C · Low 18.2°C · 84 mm rain
- Masindi in MayUganda · 293 kmHigh 26.7°C · Low 18.6°C · 136 mm rain
- Hoima in MayUganda · 305 kmHigh 26.7°C · Low 18.4°C · 251 mm rain
- Lira in MayUganda · 321 kmHigh 27.2°C · Low 18.8°C · 169 mm rain
- Bakwa in MayDemocratic Republic of the Congo · 364 kmHigh 28.9°C · Low 21.5°C · 155 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Yei) is explained once on the Yei year overview and on the Sources, method and limits page.