Wau weather in September

In September, Wau sees average daytime highs of 31°C and overnight lows near 22°C, with 155 mm of rain across 23.2 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 13% 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 Wau's 10th-clearest and 12th-windiest month. For the whole year in context, see Wau's year-round climate.

Daytime high
31°
10th warmest
Overnight low
22°
2nd coldest
Rainfall
155 mm
23.2 wet days
Daylight
12 hours
7:01 AM – 7:04 PM
Cloud cover
68%
10th clearest
Wind
5 km/h
12th windiest
Solar energy
5.76 kWh/m²
Travel score
3.1
out of 10

Wau is city in northwestern South Sudan.

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 Wau reaches about 31°C in the afternoon and slips back to 22°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 29°C and 33°C. Set against its neighbours, September runs about 1°C warmer than August and about 1°C cooler than October.

20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
13022
23022
33022
43022
53022
63022
73122
83122
93122
103122
113122
123122
133122
143122
153122
163122
173122
183122
193122
203122
213122
223122
233122
243122
253122
263123
273123
283123
293123
303123

How September really feels in Wau

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.

Wau 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
Jan35° / 23°00.211.63.0
Feb37° / 24°30.711.71.8
Mar38° / 26°204.211.91.3
Apr36° / 26°5812.712.21.7
May34° / 25°11819.512.32.4
Jun32° / 23°12720.512.43.0
Jul30° / 23°16623.512.43.3
Aug30° / 22°19224.812.33.3
Sep31° / 22°15523.2123.1
Oct32° / 23°12520.211.83.1
Nov34° / 23°173.911.63.6
Dec35° / 23°10.211.63.3

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 13% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 27% of September, with mostly cloudy or overcast conditions the remaining 60%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
12971
23070
33169
43268
53367
63565
73565
83664
93862
103961
114060
124159
134357
144357
154357
164456
174456
184456
194456
204456
214357
224357
234357
244258
254357
264357
274258
284258
294258
304159

Chance of precipitation in September

Any precipitation

Wau gets around 155 mm of rain over 23.2 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 77% and peaks near 80% on the wettest days.

0%20%40%60%80%151015202530
Rain chance (%)
180
280
379
479
579
678
778
878
977
1077
1177
1276
1376
1476
1576
1676
1776
1876
1976
2076
2177
2277
2377
2477
2577
2677
2777
2877
2977
3077

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 96% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202530
Muggy (%)Oppressive (%)
1595
2595
3595
4595
5595
6595
7595
8595
9595
10496
11496
12496
13496
14496
15496
16397
17397
18397
19397
20397
21397
22298
23298
24298
25298
26298
27298
28397
29397
30397

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 6 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
16calm
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 7:03 AM to 6:59 AM, and sunset from 7:12 PM to 6:56 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.17:037:12
212.17:037:12
312.17:037:11
412.17:037:11
512.17:037:10
612.17:037:09
712.17:027:09
812.17:027:08
912.17:027:08
1012.17:027:07
1112.17:027:07
1212.17:027:06
1312.17:027:05
1412.17:017:05
1512.07:017:04
1612.07:017:04
1712.07:017:03
1812.07:017:02
1912.07:017:02
2012.07:007:01
2112.07:007:01
2212.07:007:00
2312.07:007:00
2412.07:006:59
2512.07:006:58
2612.07:006:58
2712.07:006:57
2812.06:596:57
2911.96:596:56
3011.96:596:56

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.76 kWh/m².

For context, solar energy here swings from a low near 5.2 kWh/m² to a high of 6.55 kWh/m² in February across the year — September's 5.76 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
95.7Bright
105.7Bright
115.7Bright
125.7Bright
135.7Bright
145.8Bright
155.8Bright
165.8Bright
175.8Bright
185.8Bright
195.8Bright
205.9Bright
215.9Bright
225.9Bright
235.9Bright
245.9Bright
255.9Bright
265.9Bright
275.9Bright
285.9Bright
295.9Bright
305.9Bright
Planning a trip in September

Hazard calendar for Wau

In seasonPeak

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

Wau's monsoon runs May–October, when most of the year's rain falls.

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

Is September a good time to visit Wau?

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

3.1
Sightseeing
5th-best month of the year
4.5
Beach & pool
9th-best month of the year

September is a weaker month for outdoor sightseeing in Wau.

What to pack for Wau in September

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

In September, Wau sees daytime highs around 31°C and nights near 22°C. Pack light clothes and rain gear. Worth having: sun protection. About 23 days see rain.

light clothesrain gearsun protection

UV index in Wau 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 Wau peaks around March 19 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 11 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 19UV 13Dec 11UV 9
UV index (midday)Level
Jan11Extreme
Feb11Extreme
Mar14Extreme
Apr13Extreme
May11Extreme
Jun11Extreme
Jul11Extreme
Aug13Extreme
Sep12Extreme
Oct12Extreme
Nov9Very high
Dec9Very high

Air quality in Wau 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 Wau is worst in November — around 59 µg/m³ PM2.5 (unhealthy), about 5.9× the cleanest month (August, 10 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecModerateModerateModerateGoodModeratePoorNov 2158 µg/m³Aug 2410 µg/m³
PM2.5 (µg/m³)Level
Jan23Moderate
Feb30Moderate
Mar37Poor
Apr22Moderate
May11Good
Jun14Moderate
Jul14Moderate
Aug10Good
Sep10Good
Oct15Moderate
Nov59Unhealthy
Dec52Poor
Location & terrain

Where is Wau?

Wau sits at 7.7°N, 28.0°E, 440 m above sea level, in South Sudan. The nearest listed city is Kuacjok, 67 km away.

TonjGogrialAweilWinejokRumbekAbyeiLeer

Topography around Wau

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

Within 3 km, the terrain around Wau has only modest variations in elevation — a maximum elevation change of 58 m around an average of 447 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 112 m; within 80 km, only modest variations in elevation — a maximum elevation change of 198 m.

The land around Wau is covered by artificial surfaces (50%) and grassland (34%) within 3 km, grassland (70%) within 16 km, and grassland (46%) and shrubs (38%) within 80 km.

3 km
58 m
16 km
112 m
80 km
198 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwaterwetland
September weather nearby: Kuacjok 67 km · Tonj 89 km · Gogrial 93 km · Aweil 135 km · Winejok 153 km · Rumbek 211 km · Abyei 216 km · Leer 246 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 Wau (7.7011°, 27.9897°, elevation 440 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).