Climate averages 1991–2020
Yei weather
in December.
A hot, fairly dry month: the 4th warmest and the 3rd driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
December is a hot month in Yei: daytime highs average 31.2°C and nights cool to about 20.4°C. By daytime temperature it is the 4th warmest of the 12 months.
Expect about 21 mm of rain on roughly 4 days, which makes December a fairly dry month (the 3rd driest of the 12 months). Daylight, from sunrise to sunset, lasts about 11 h 53 min on an average December day.
The nearest other city in this atlas is Arua (122 km away). In December its highs average 28.3°C, 2.9°C cooler than Yei, with 16 mm of rain.
Among the 6 cities listed in South Sudan, Yei ranks 6th of 6 for the warmest December highs and 6th of 6 for the driest December (rainfall, lowest first). The mean December high of those 6 cities is 34.5°C; Yei is 3.4°C cooler than that mean.
From December to January, average highs rise by 2.1°C to 33.3°C, and monthly rainfall falls from 21 mm to 9.5 mm.
The annual picture
December 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 | 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, selected | 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
December in nearby cities
- Arua in DecemberUganda · 122 kmHigh 28.3°C · Low 18.4°C · 16 mm rain
- Juba in DecemberSouth Sudan · 131 kmHigh 34.2°C · Low 23.0°C · 9.2 mm rain
- Gulu in DecemberUganda · 232 kmHigh 29.9°C · Low 19.3°C · 30 mm rain
- Bunia in DecemberDemocratic Republic of the Congo · 286 kmHigh 26.1°C · Low 17.2°C · 65 mm rain
- Masindi in DecemberUganda · 293 kmHigh 28.0°C · Low 18.4°C · 58 mm rain
- Hoima in DecemberUganda · 305 kmHigh 27.3°C · Low 18.2°C · 166 mm rain
- Lira in DecemberUganda · 321 kmHigh 29.5°C · Low 18.6°C · 38 mm rain
- Bakwa in DecemberDemocratic Republic of the Congo · 364 kmHigh 31.4°C · Low 21.1°C · 22 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.