Yambio weather in September

In September, Yambio sees average daytime highs of 29°C and overnight lows near 21°C, with 190 mm of rain across 26.1 wet days and about 12 hours of daylight. It is the 8th-warmest and 2nd-wettest month of the year here.

Day-to-day highs hold fairly steady near 29°C through the month. The sky is clear or mostly clear about 6% of the time in September, and the air most often feels muggy.

Daylight stretches from about 12 h 06 min at the start of September to 12 hours by month's end. Set against the rest of the year, September is Yambio's 8th-clearest and 10th-windiest month. For the whole year in context, see Yambio's year-round climate.

Daytime high
29°
8th warmest
Overnight low
21°
3rd coldest
Rainfall
190 mm
26.1 wet days
Daylight
12 hours
7:00 AM – 7:01 PM
Cloud cover
75%
8th clearest
Wind
5 km/h
10th windiest
Solar energy
5.5 kWh/m²
Travel score
3.5
out of 10

Yambio is human settlement in South Sudan.

Founded
1800

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

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 29°C through the month.

A typical September day in Yambio reaches about 29°C in the afternoon and slips back to 21°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 27°C and 30°C. Set against its neighbours, September runs on par with August and on par with October.

15°20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
12820
22820
32820
42820
52820
62820
72820
82820
92820
102820
112920
122920
132920
142921
152921
162921
172921
182921
192921
202921
212921
222921
232921
242921
252921
262921
272921
282921
292921
302921

How September really feels in Yambio

Once humidity and wind are folded in, September averages 0 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
0
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

September sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Yambio weather by month

How September compares with the rest of the year at a glance. September is the 8th-warmest and 2nd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan34° / 22°132.411.83.6
Feb34° / 23°244.811.93.0
Mar33° / 23°10015123.0
Apr30° / 22°18822.512.13.2
May29° / 22°18324.712.23.5
Jun28° / 21°15124.212.33.9
Jul28° / 20°16325.312.24.1
Aug28° / 20°1892612.13.8
Sep29° / 21°19026.1123.5
Oct29° / 21°23627.911.93.3
Nov30° / 21°11917.111.84.1
Dec32° / 21°213.811.74.6

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 6% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 19% of September, with mostly cloudy or overcast conditions the remaining 74%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
12377
22476
32476
42476
52575
62575
72674
82674
92674
102773
112773
122872
132872
142872
152872
162872
172872
182971
192773
202773
212773
222674
232674
242476
252476
262476
272476
282377
292377
302377

Chance of precipitation in September

Any precipitation

Yambio gets around 190 mm of rain over 26.1 wet days in September. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 87% and peaks near 89% on the wettest days.

0%20%40%60%80%100%151015202530
Rain chance (%)
183
284
384
485
585
686
786
887
987
1088
1188
1289
1389
1489
1589
1689
1789
1889
1988
2088
2188
2287
2387
2487
2586
2686
2786
2886
2986
3087

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the muggy band about 82% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202530
Muggy (%)Oppressive (%)
19010
28911
38911
48812
58713
68713
78614
88614
98515
108515
118416
128416
138317
148317
158218
168119
178119
188020
198020
207921
217921
227921
237822
247822
257822
267822
277723
287723
297723
307624

Wind in September

Winds average 5 km/h in September.

Across September, daily wind ranges from about 5 km/h on the calmest days to 5 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
15calm
25calm
35calm
45calm
55calm
65calm
75calm
85calm
95calm
105calm
115calm
125calm
135calm
145calm
155calm
165calm
175calm
185calm
195calm
205calm
215calm
225calm
235calm
245calm
255calm
265calm
275calm
285calm
295calm
305calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 06 min at the start of September to 12 hours by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 6 minutes over September. Sunrise moves from 7:03 AM to 6:57 AM, and sunset from 7:09 PM to 6:55 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.17:037:09
212.17:037:08
312.17:037:08
412.17:037:07
512.17:037:07
612.17:027:06
712.17:027:06
812.17:027:05
912.17:027:05
1012.17:017:04
1112.07:017:04
1212.07:017:03
1312.07:017:03
1412.07:007:02
1512.07:007:02
1612.07:007:01
1712.07:007:01
1812.07:007:00
1912.06:597:00
2012.06:596:59
2112.06:596:59
2212.06:596:58
2312.06:586:58
2412.06:586:58
2512.06:586:57
2612.06:586:57
2712.06:576:56
2812.06:576:56
2912.06:576:55
3012.06:576:55

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.5 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 — September's 5.5 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.4Bright
25.4Bright
35.4Bright
45.4Bright
55.5Bright
65.5Bright
75.5Bright
85.5Bright
95.5Bright
105.5Bright
115.5Bright
125.5Bright
135.5Bright
145.5Bright
155.5Bright
165.5Bright
175.5Bright
185.5Bright
195.5Bright
205.5Bright
215.5Bright
225.5Bright
235.5Bright
245.5Bright
255.5Bright
265.5Bright
275.5Bright
285.4Bright
295.4Bright
305.4Bright
Planning a trip in September

Is September a good time to visit Yambio?

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

3.5
Sightseeing
7th-best month of the year
4.2
Beach & pool
11th-best month of the year

September is a weaker month for outdoor sightseeing in Yambio.

What to pack for Yambio in September

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

In September, Yambio sees daytime highs around 29°C and nights near 21°C. Pack light clothes and rain gear. Worth having: sun protection. About 26 days see rain.

light clothesrain gearsun protection

UV index in Yambio in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 13 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Yambio peaks around March 22 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 16 at about 10 (very high).

The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highMar 22UV 13Dec 16UV 10
UV index (midday)Level
Jan10Extreme
Feb11Extreme
Mar14Extreme
Apr13Extreme
May12Extreme
Jun11Extreme
Jul10Extreme
Aug13Extreme
Sep13Extreme
Oct13Extreme
Nov10Extreme
Dec10Very high

Air quality in Yambio in September

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where September falls, not just the annual average.

Air quality in Yambio is worst in January — around 88 µg/m³ PM2.5 (unhealthy), about 11.5× the cleanest month (October, 8 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

0306090JanFebMarAprMayJunJulAugSepOctNovDecUnhealthyModerateGoodModerateGoodModerateJan 1787 µg/m³Oct 108 µg/m³
PM2.5 (µg/m³)Level
Jan88Unhealthy
Feb75Unhealthy
Mar37Poor
Apr14Moderate
May10Good
Jun15Moderate
Jul16Moderate
Aug11Good
Sep9Good
Oct8Good
Nov17Moderate
Dec71Unhealthy
Location & terrain

Where is Yambio?

Yambio sits at 4.6°N, 28.4°E, 655 m above sea level, in South Sudan. The nearest listed city is Bakwa, 121 km away.

BakwaWatsaYeiRumbekTonjKoboko

Topography around Yambio

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Yambio.

Within 3 km, the terrain around Yambio has only modest variations in elevation — a maximum elevation change of 51 m around an average of 652 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 131 m; within 80 km, significant variations in elevation — a maximum elevation change of 361 m.

The land around Yambio is covered by trees (36%), shrubs (24%) and grassland (21%) within 3 km, trees (45%) and shrubs (44%) within 16 km, and trees (73%) and shrubs (22%) within 80 km.

3 km
51 m
16 km
131 m
80 km
361 m
treesshrubsgrasslandartificial surfaces
September weather nearby: Bakwa 121 km · Watsa 212 km · Isiro 218 km · Yei 259 km · Wamba 273 km · Rumbek 286 km · Tonj 302 km · Koboko 312 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 Yambio (4.5708°, 28.3942°, elevation 655 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).