Climate averages 1991–2020

Yei weather
in August.

A warm, very wet month: the 11th warmest and the 11th driest of the year.

Long-term climate patterns, not a forecast for a particular trip.

Average high 27.5°C Daytime mean, August

Average low 18.8°C Night-time mean, August

Rainfall 199 mm 27 days with ≥1 mm

Daylight 12 h Sunrise to sunset, per day

August is a warm month in Yei: daytime highs average 27.5°C and nights cool to about 18.8°C. By daytime temperature it is the 11th warmest of the 12 months.

Expect about 199 mm of rain on roughly 27 days, which makes August a very wet month (the 11th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 15 min on an average August day.

The nearest other city in this atlas is Arua (122 km away). In August its highs average 26.0°C, 1.4°C cooler than Yei, with 137 mm of rain.

Among the 6 cities listed in South Sudan, Yei ranks 6th of 6 for the warmest August highs and 6th of 6 for the driest August (rainfall, lowest first). The mean August high of those 6 cities is 29.2°C; Yei is 1.8°C cooler than that mean.

From August to September, average highs rise by 0.5°C to 27.9°C, and monthly rainfall falls from 199 mm to 178 mm.

The annual picture

August in context

30-year average

Average highAverage low°C

Monthly rainfall

Average total · mm

Averages 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

1991–2020

Monthly climate averages for Yei, 1991–2020
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, selected	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

August in nearby cities

Distance from Yei

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 limits

How 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.