Yei climate

Name: Yei
Address: SS

Yei is warmest in February, with average highs of 34 °C, and coldest in August, when nights average 19 °C. October is the wettest month (218 mm) and January the driest (10.0 mm). Figures are 1991–2020 climate normals.

Across a full year Yei averages 1,425 mm of rain and 359 days above 25 °C.

South Sudan · population 260,720 · 1991–2020 normals

Temperature below 0 °C to above 30 °C Rain band height is that month’s share of the wettest month

Warmest month February 34 °C
Coldest month August 19 °C
Driest month January 10 mm
Wettest month October 218 mm
Least cloud January 51 % cloud
Hottest on record February 40 °C
Coldest on record January 16 °C

What to expectYei through the year

Yei has a clear annual cycle: average daily highs run from 28 °C in August to 34 °C in February, a swing of 5.7 °C in mean temperature across the year.

Counted across a normal year, 359 days a year reach 25 °C, 150 of them reach 30 °C. The warmest reading in the 1991–2020 record is 40 °C, in February.

Rain is strongly seasonal. October averages 218 mm against 10 mm in January — 22 times as much. Planning around the dry months matters more here than planning around temperature.

Month by month

Month	Avg high	Rainfall	Cloud
January	33.3 °C	10 mm	51 %
February	34.4 °C	15 mm	56 %
March	33.1 °C	64 mm	66 %
April	30.7 °C	140 mm	76 %
May	29.2 °C	154 mm	72 %
June	28.0 °C	141 mm	69 %
July	27.4 °C	180 mm	69 %
August	27.5 °C	194 mm	69 %
September	28.0 °C	170 mm	68 %
October	28.0 °C	218 mm	77 %
November	29.1 °C	120 mm	67 %
December	31.2 °C	20 mm	53 %

Temperature month by month

Month	Avg high	Avg low	Mean	Record high	Record low	Days above 25 °C	Days above 30 °C
January	33.3 °C	21.4 °C	27.3 °C	38.5 °C	16.3 °C	31	29
February	34.4 °C	22.5 °C	28.3 °C	39.8 °C	17.4 °C	28	28
March	33.1 °C	22.4 °C	27.4 °C	38.8 °C	18.7 °C	31	27
April	30.7 °C	21.4 °C	25.5 °C	38.3 °C	18.3 °C	30	18
May	29.2 °C	20.5 °C	24.3 °C	34.9 °C	17.8 °C	31	9
June	28.0 °C	19.5 °C	23.3 °C	32.9 °C	17.1 °C	29	2
July	27.4 °C	18.8 °C	22.6 °C	31.4 °C	16.6 °C	29	1
August	27.5 °C	18.7 °C	22.6 °C	31.0 °C	16.4 °C	30	0
September	28.0 °C	19.0 °C	23.1 °C	32.8 °C	16.5 °C	29	2
October	28.0 °C	19.3 °C	23.2 °C	32.5 °C	16.8 °C	30	3
November	29.1 °C	19.6 °C	24.0 °C	34.6 °C	17.2 °C	30	8
December	31.2 °C	20.3 °C	25.6 °C	36.5 °C	16.6 °C	31	22

Rain, sun and wind month by month

Month	Rainfall	Wet days	Daylight	Cloud cover	Humidity	Wind
January	10 mm	2	12 h/day	51 %	39 %	13 km/h
February	15 mm	3	12 h/day	56 %	39 %	14 km/h
March	64 mm	12	12 h/day	66 %	56 %	14 km/h
April	140 mm	19	12 h/day	76 %	71 %	12 km/h
May	154 mm	22	12 h/day	72 %	79 %	9.9 km/h
June	141 mm	21	12 h/day	69 %	81 %	8.7 km/h
July	180 mm	24	12 h/day	69 %	82 %	8.5 km/h
August	194 mm	27	12 h/day	69 %	83 %	9.0 km/h
September	170 mm	24	12 h/day	68 %	82 %	9.2 km/h
October	218 mm	25	12 h/day	77 %	82 %	9.4 km/h
November	120 mm	16	12 h/day	67 %	75 %	10 km/h
December	20 mm	4	12 h/day	53 %	55 %	12 km/h

How Yei compares

The same four figures for nearby destinations, so the numbers above have something to be read against. Summer high is the warmest month's average high; winter low is the coldest month's average low.

Destination	Summer high	Winter low	Rain per year	Days above 25 °C
Yei	34 °C	19 °C	1,425 mm	359
Juba · South Sudan	37 °C	21 °C	973 mm	365
Gulu · Uganda	33 °C	18 °C	1,471 mm	349
Bunia · Democratic Republic of the Congo	28 °C	17 °C	1,094 mm	284
Isiro · Democratic Republic of the Congo	32 °C	19 °C	1,679 mm	335

Planning a trip? See the best time to visit Yei.

QuestionsCommon questions about Yei’s climate

When is the best time to visit Yei?

That depends on what you want, so the honest answer is a comparison rather than a single month. July, August, September sit closest to 20 °C on average, February is the warmest month and January the driest. The month-by-month table above has the full picture.

How hot does Yei get?

In February, the warmest month, daily highs average 34 °C. About 150 days a year pass 30 °C. The highest value in the 1991–2020 record is 40 °C.

How cold does it get in winter?

Nights average 19 °C in August, the coldest month. Freezing nights are not part of a normal year here.

Which month is wettest in Yei?

October, averaging 218 mm over 25 days with rain. The driest month is January with 10 mm. The year as a whole averages 1,425 mm.

Are these figures a forecast?

No. They are 1991–2020 climate normals: the average of thirty years, which describes what a month is usually like in Yei rather than what any particular week will bring. Individual years can differ substantially from the normal.

Data sources and method

ERA5 / ERA5-Land reanalysis — Copernicus Climate Change Service (C3S), ECMWF. Copernicus Licence
Open-Meteo — Open-Meteo.com. CC BY 4.0
NOAA OISST v2.1 — NOAA Physical Sciences Laboratory. Public domain
GeoNames — GeoNames.org. CC BY 4.0

Normal period: 1991–2020
Dataset version: era5-1991-2020-scores1.1
Last processed: 1 August 2026

Measured values come from ERA5 reanalysis and are reproduced unchanged. Calculated by us: monthly rankings, daylight hours, beach and comfort scores. Full formulas are on the methodology page.

Contains modified Copernicus Climate Change Service information 2026. Neither the European Commission nor ECMWF is responsible for any use that may be made of the Copernicus information or data it contains.