Yei weather in January

In January, Yei sees average daytime highs of 33°C and overnight lows near 21°C, with 10 mm of rain across 2 wet days and about 11.8 hours of daylight. It is the 2nd-warmest and 12th-wettest month of the year here.

Day-to-day highs hold fairly steady near 33°C through the month. The sky is clear or mostly clear about 37% of the time in January, and the air most often feels dry.

Daylight stretches from about 11 h 48 min at the start of January to 11 h 48 min by month's end. Set against the rest of the year, January is Yei's 1st-clearest and 2nd-windiest month. For the whole year in context, see Yei's year-round climate.

Daytime high
33°
2nd warmest
Overnight low
21°
9th coldest
Rainfall
10 mm
2 wet days
Daylight
11 h 48 min
7:13 AM – 7:00 PM
Cloud cover
53%
1st clearest
Wind
9 km/h
2nd windiest
Solar energy
5.93 kWh/m²
Travel score
4.5
out of 10

Yei is City in South Sudan.

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in January

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 33°C through the month.

A typical January day in Yei reaches about 33°C in the afternoon and slips back to 21°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 30°C and 35°C. Set against its neighbours, January runs about 2°C warmer than December and about 1°C cooler than February.

15°20°25°30°35°40°151015202531
Avg high (°C)Avg low (°C)
13221
23221
33221
43221
53221
63221
73221
83221
93221
103221
113221
123221
133221
143221
153221
163221
173321
183321
193321
203321
213321
223321
233321
243321
253321
263321
273322
283322
293322
303322
313322

How January really feels in Yei

Once humidity and wind are folded in, January averages 29 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C
29
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

The story in January is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Yei weather by month

How January compares with the rest of the year at a glance. January is the 2nd-warmest and 12th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan33° / 21°10211.84.5
Feb34° / 22°153.511.93.7
Mar33° / 22°6712.1123.4
Apr30° / 21°14619.712.13.5
May29° / 20°15521.612.24.0
Jun28° / 19°14321.812.24.4
Jul27° / 19°18324.612.24.3
Aug27° / 19°19926.912.14.0
Sep28° / 19°17824.4124.1
Oct28° / 19°22525.911.93.8
Nov29° / 20°1231611.84.6
Dec31° / 20°21411.85.3

Cloud cover in January

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 37% of the time in January, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 22% of January, with mostly cloudy or overcast conditions the remaining 41%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16040
25941
35941
45842
55941
65941
75842
85842
95842
105842
115842
125743
135743
145743
155842
165842
175842
185842
195842
205842
215941
226040
236040
246040
256040
266040
276040
286040
296040
306040
316040

Chance of precipitation in January

Any precipitation

Yei gets around 10 mm of rain over 2 wet days in January, the driest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 6% and peaks near 8% on the wettest days.

0%10%20%30%151015202531
Rain chance (%)
15
25
35
45
55
65
75
85
95
105
115
125
136
146
156
166
177
187
197
207
218
228
238
248
258
268
278
288
298
308
318

Humidity in January

DryComfortableHumidMuggyOppressiveMiserable

Most of January feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, January lands in the dry band about 62% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
15628133
25727133
35926123
45926123
56025123
66025123
76124123
86224122
96323122
106322132
116322132
126421132
136321142
146420142
156320152
166419152
176319162
186319162
196319162
206219172
216120172
226120172
236120172
246120172
256120172
266120172
276120172
286120172
296219172
306219172
316219172

Wind in January

Winds average 9 km/h in January.

Across January, daily wind ranges from about 8 km/h on the calmest days to 9 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
18calm
28calm
38calm
48calm
58calm
68calm
78calm
88calm
98calm
108calm
118calm
128calm
138calm
148calm
158calm
169calm
179calm
189calm
199calm
209calm
219calm
229calm
239calm
249calm
259calm
269calm
279calm
289calm
299calm
309calm
319calm

Sunrise & sunset in January

DaylightNight

Daylight runs from about 11 h 48 min at the start of January to 11 h 48 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 0 minutes over January. Sunrise moves from 7:07 AM to 7:16 AM, and sunset from 6:53 PM to 7:05 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.87:076:53
211.87:086:54
311.87:086:54
411.87:096:55
511.87:096:55
611.87:106:56
711.87:106:56
811.87:106:57
911.87:116:57
1011.87:116:58
1111.87:116:58
1211.87:126:59
1311.87:126:59
1411.87:126:59
1511.87:137:00
1611.87:137:00
1711.87:137:01
1811.87:147:01
1911.87:147:01
2011.87:147:02
2111.87:147:02
2211.87:157:02
2311.87:157:03
2411.87:157:03
2511.87:157:03
2611.87:157:04
2711.87:157:04
2811.87:167:04
2911.87:167:05
3011.87:167:05
3111.87:167:05

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 5.93 kWh/m².

For context, solar energy here swings from a low near 5 kWh/m² to a high of 6.1 kWh/m² in February across the year — January's 5.93 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.8Bright
25.8Bright
35.8Bright
45.8Bright
55.8Bright
65.9Bright
75.9Bright
85.9Bright
95.9Bright
105.9Bright
115.9Bright
125.9Bright
135.9Bright
145.9Bright
155.9Bright
165.9Bright
175.9Bright
185.9Bright
196.0Bright
206.0Bright
216.0Bright
226.0Bright
236.0Bright
246.0Bright
256.0Bright
266.0Bright
276.0Bright
286.0Intense
296.0Intense
306.0Intense
316.0Intense
Planning a trip in January

Hazard calendar for Yei

In seasonPeak

None of Yei's seasonal hazards are active in January. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

Yei's rainy season runs April–November, when most of the year's rain falls.

Rainy season
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is January a good time to visit Yei?

Our two travel scores rate January for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

4.5
Sightseeing
3rd-best month of the year
7.5
Beach & pool
2nd-best month of the year

January is a reasonable time to visit Yei for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Yei in January

From January's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In January, Yei sees daytime highs around 33°C and nights near 21°C. Pack light clothes. Worth having: sun protection.

light clothessun protection

UV index in Yei in January

LowModerateHighVery highExtreme

Clear-sky midday UV in January peaks around 11 (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.

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeMar 17UV 15Dec 15UV 10
UV index (midday)Level
Jan11Extreme
Feb14Extreme
Mar15Extreme
Apr14Extreme
May12Extreme
Jun10Extreme
Jul11Extreme
Aug12Extreme
Sep13Extreme
Oct13Extreme
Nov10Extreme
Dec10Very high

Air quality in Yei in January

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where January 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).

0306090120JanFebMarAprMayJunJulAugSepOctNovDecUnhealthyModeratePoorJan 1795 µg/m³Oct 1114 µg/m³
PM2.5 (µg/m³)Level
Jan101Unhealthy
Feb55Poor
Mar27Moderate
Apr15Moderate
May14Moderate
Jun21Moderate
Jul22Moderate
Aug17Moderate
Sep14Moderate
Oct13Moderate
Nov18Moderate
Dec49Poor
Location & terrain

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.

KobokoYumbeAruaMoyoJubaAruAdjumaniWatsa

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.

3 km
62 m
16 km
156 m
80 km
1,060 m
treesshrubsgrasslandcroplandartificial surfaces
January weather nearby: Koboko 82 km · Yumbe 94 km · Arua 122 km · Moyo 126 km · Juba 131 km · Aru 138 km · Adjumani 147 km · Watsa 173 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
Christian 61%folk religion 33%Muslim 6%

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. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).