Rumbek weather in September

In September, Rumbek sees average daytime highs of 31°C and overnight lows near 22°C, with 150 mm of rain across 21.9 wet days and about 12 hours of daylight. It is the 10th-warmest and 3rd-wettest month of the year here.

Day-to-day highs hold fairly steady near 31°C through the month. The sky is clear or mostly clear about 16% of the time in September, and the air most often feels oppressive.

Daylight stretches from about 12 h 06 min at the start of September to 11 h 54 min by month's end. Set against the rest of the year, September is Rumbek's 7th-clearest and 12th-windiest month. For the whole year in context, see Rumbek's year-round climate.

Daytime high
31°
10th warmest
Overnight low
22°
3rd coldest
Rainfall
150 mm
21.9 wet days
Daylight
12 hours
6:55 AM – 6:57 PM
Cloud cover
67%
7th clearest
Wind
5 km/h
12th windiest
Solar energy
5.68 kWh/m²
Travel score
3.3
out of 10

Rumbek is human settlement.

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 31°C through the month.

A typical September day in Rumbek reaches about 31°C in the afternoon and slips back to 22°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 29°C and 32°C. Set against its neighbours, September runs on par with August and on par with October.

20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
13022
23022
33022
43022
53022
63022
73022
83022
93122
103122
113122
123122
133122
143122
153122
163122
173122
183122
193122
203122
213122
223122
233122
243122
253122
263122
273123
283123
293123
303123

How September really feels in Rumbek

Once humidity and wind are folded in, September averages 30 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
30
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

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

Rumbek weather by month

How September compares with the rest of the year at a glance. September is the 10th-warmest and 3rd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan36° / 24°30.411.62.7
Feb37° / 25°4111.81.7
Mar38° / 26°245.1121.4
Apr36° / 26°7713.712.11.9
May33° / 24°13620.712.32.6
Jun31° / 23°13220.612.43.2
Jul30° / 22°16723.112.43.4
Aug30° / 22°17424.112.23.3
Sep31° / 22°15021.9123.3
Oct31° / 23°13121.111.83.2
Nov33° / 23°338.411.73.6
Dec35° / 23°4111.63.2

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 16% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 24% of September, with mostly cloudy or overcast conditions the remaining 60%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
13763
23763
33862
43862
53961
63862
73961
84060
94060
104159
114159
124258
134258
144357
154357
164258
174258
184258
194159
204159
214060
223961
233961
243961
253862
263862
273862
283763
293565
303565

Chance of precipitation in September

Any precipitation

Rumbek gets around 150 mm of rain over 21.9 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 73% and peaks near 79% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%80%151015202530
Rain chance (%)
179
278
378
478
578
677
776
876
975
1074
1173
1272
1371
1471
1570
1670
1770
1870
1970
2070
2170
2270
2370
2470
2571
2671
2771
2872
2972
3072

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the oppressive band about 97% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202530
Muggy (%)Oppressive (%)
1298
2298
3298
4298
5298
6397
7397
8397
9397
10397
11397
12397
13496
14496
15496
16496
17496
18496
19496
20496
21496
22496
23496
24496
25496
26496
27496
28496
29496
30595

Wind in September

Winds average 5 km/h in September, the calmest month.

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 11 h 54 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 12 minutes over September. Sunrise moves from 6:57 AM to 6:52 AM, and sunset from 7:05 PM to 6:49 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.16:577:05
212.16:577:04
312.16:577:04
412.16:577:03
512.16:567:03
612.16:567:02
712.16:567:02
812.16:567:01
912.16:567:01
1012.16:567:00
1112.16:557:00
1212.16:556:59
1312.16:556:58
1412.06:556:58
1512.06:556:57
1612.06:556:57
1712.06:546:56
1812.06:546:56
1912.06:546:55
2012.06:546:54
2112.06:546:54
2212.06:536:53
2312.06:536:53
2412.06:536:52
2512.06:536:52
2612.06:536:51
2712.06:536:51
2812.06:526:50
2912.06:526:50
3011.96:526:49

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.68 kWh/m².

For context, solar energy here swings from a low near 5.08 kWh/m² to a high of 6.35 kWh/m² in February across the year — September's 5.68 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.5Bright
25.5Bright
35.5Bright
45.6Bright
55.6Bright
65.6Bright
75.6Bright
85.6Bright
95.6Bright
105.7Bright
115.7Bright
125.7Bright
135.7Bright
145.7Bright
155.7Bright
165.7Bright
175.7Bright
185.7Bright
195.7Bright
205.7Bright
215.7Bright
225.7Bright
235.7Bright
245.7Bright
255.7Bright
265.7Bright
275.7Bright
285.7Bright
295.7Bright
305.7Bright
Planning a trip in September

Hazard calendar for Rumbek

In seasonPeak

In September, Rumbek sits inside its rainy season season. The full year is below, with each hazard's peak months called out.

Rumbek's rainy season runs May–October, when most of the year's rain falls.

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

Is September a good time to visit Rumbek?

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

3.3
Sightseeing
3rd-best month of the year
4.8
Beach & pool
7th-best month of the year

September is a weaker month for outdoor sightseeing in Rumbek.

What to pack for Rumbek in September

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

In September, Rumbek sees daytime highs around 31°C and nights near 22°C. Pack light clothes and rain gear. Worth having: sun protection. About 22 days see rain.

light clothesrain gearsun protection

UV index in Rumbek in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 12 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Rumbek peaks around March 20 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 14 at about 9 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highMar 20UV 14Dec 14UV 9
UV index (midday)Level
Jan11Extreme
Feb11Extreme
Mar14Extreme
Apr13Extreme
May11Extreme
Jun11Extreme
Jul11Extreme
Aug13Extreme
Sep12Extreme
Oct13Extreme
Nov10Very high
Dec9Very high

Air quality in Rumbek 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 Rumbek is worst in January — around 81 µg/m³ PM2.5 (unhealthy), about 7.2× the cleanest month (September, 11 µg/m³).

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

0306090JanFebMarAprMayJunJulAugSepOctNovDecUnhealthyModerateGoodModerateUnhealthyJan 1281 µg/m³Sep 1311 µg/m³
PM2.5 (µg/m³)Level
Jan81Unhealthy
Feb77Unhealthy
Mar51Poor
Apr25Moderate
May12Good
Jun16Moderate
Jul16Moderate
Aug12Good
Sep11Good
Oct13Moderate
Nov37Poor
Dec80Unhealthy
Location & terrain

Where is Rumbek?

Rumbek sits at 6.8°N, 29.7°E, 428 m above sea level, in South Sudan. The nearest listed city is Tonj, 122 km away.

TonjLeerWauBorKuacjokGogrialYambioJuba

Topography around Rumbek

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

Within 3 km, the terrain around Rumbek has only modest variations in elevation — a maximum elevation change of 10 m around an average of 422 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 47 m; within 80 km, only modest variations in elevation — a maximum elevation change of 160 m.

The land around Rumbek is covered by grassland (72%) and artificial surfaces (20%) within 3 km, grassland (67%) and shrubs (26%) within 16 km, and grassland (63%) and shrubs (22%) within 80 km.

3 km
10 m
16 km
47 m
80 km
160 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwetland
September weather nearby: Tonj 122 km · Leer 174 km · Wau 211 km · Bor 218 km · Kuacjok 250 km · Gogrial 259 km · Yambio 286 km · Juba 303 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 Rumbek (6.8062°, 29.6774°, elevation 428 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).