Mandeni weather in September

In September, Mandeni sees average daytime highs of 23°C and overnight lows near 18°C, with 64 mm of rain across 9.2 wet days and about 11.8 hours of daylight. It is the 9th-warmest and 8th-wettest month of the year here.

Day-to-day highs hold fairly steady near 23°C through the month. The sky is clear or mostly clear about 50% of the time in September, and the air most often feels humid.

Daylight stretches from about 11 h 24 min at the start of September to 12 h 12 min by month's end. Set against the rest of the year, September is Mandeni's 6th-clearest and 3rd-windiest month. For the whole year in context, see Mandeni's year-round climate.

Daytime high
23°
9th warmest
Overnight low
18°
4th coldest
Rainfall
64 mm
9.2 wet days
Daylight
11 h 48 min
5:54 AM – 5:43 PM
Cloud cover
44%
6th clearest
Wind
19 km/h
3rd windiest
Solar energy
4.58 kWh/m²
Travel score
7.2
out of 10

Mandeni is town in KwaZulu-Natal, South Africa.

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 23°C through the month.

A typical September day in Mandeni reaches about 23°C in the afternoon and slips back to 18°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between 19°C and 28°C. Set against its neighbours, September runs on par with August and on par with October.

15°20°25°30°151015202530
Avg high (°C)Avg low (°C)
12317
22317
32317
42317
52317
62317
72317
82317
92317
102317
112317
122317
132318
142318
152318
162318
172318
182318
192318
202318
212318
222318
232318
242318
252318
262318
272318
282318
292318
302318

Mandeni weather by month

How September compares with the rest of the year at a glance. September is the 9th-warmest and 8th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan27° / 23°10213.113.76.1
Feb27° / 23°9112136.1
Mar27° / 22°9111.512.26.6
Apr25° / 20°8210.211.37.1
May24° / 18°587.110.68.0
Jun23° / 16°365.810.28.1
Jul22° / 15°547.110.37.8
Aug22° / 16°397.2117.7
Sep23° / 18°649.211.87.2
Oct24° / 19°9013.212.76.5
Nov25° / 20°9913.313.56.3
Dec26° / 21°8812.913.86.2

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 50% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 14% of September, with mostly cloudy or overcast conditions the remaining 36%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
17327
27327
37228
47228
57129
67030
76931
86931
96832
106832
116733
126634
136634
146535
156436
166436
176337
186238
196139
206139
216040
226040
235941
245941
255842
265842
275743
285743
295644
305545

Chance of precipitation in September

Any precipitation

Mandeni gets around 64 mm of rain over 9.2 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 31% and peaks near 37% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%50%151015202530
Rain chance (%)
125
226
326
427
527
627
728
828
929
1029
1129
1230
1330
1430
1531
1631
1731
1832
1932
2032
2133
2233
2333
2434
2534
2635
2735
2836
2937
3037

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the humid band about 41% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
12048301
21948321
31848331
41847341
51746351
61745361
71744382
81643392
91642402
101641412
111640412
121639423
131639433
141638433
151637444
161536444
171536445
181536455
191535455
201435456
211435456
221435447
231435447
241335448
251334448
261334449
271334449
2813334410
2912334410
3012334411

Wind in September

Winds average 19 km/h in September.

Across September, daily wind ranges from about 18 km/h on the calmest days to 19 km/h at its breeziest. It stays fairly steady from day to day.

0510152025151015202530
Wind speed (km/h)Feels
118light breeze
218light breeze
318light breeze
418light breeze
519light breeze
619light breeze
719light breeze
819light breeze
919light breeze
1019light breeze
1119light breeze
1219light breeze
1319light breeze
1419light breeze
1519light breeze
1619light breeze
1719light breeze
1819light breeze
1919light breeze
2019light breeze
2119light breeze
2219light breeze
2319light breeze
2419light breeze
2519light breeze
2619light breeze
2719light breeze
2819light breeze
2919light breeze
3019light breeze

Sunrise & sunset in September

DaylightNight

Daylight runs from about 11 h 24 min at the start of September to 12 h 12 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 48 minutes over September. Sunrise moves from 6:12 AM to 5:36 AM, and sunset from 5:36 PM to 5:51 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.46:125:36
211.46:115:36
311.46:105:37
411.56:095:37
511.56:085:38
611.56:065:38
711.66:055:39
811.66:045:39
911.66:035:40
1011.66:015:40
1111.76:005:41
1211.75:595:41
1311.75:585:42
1411.85:565:42
1511.85:555:43
1611.85:545:43
1711.95:535:44
1811.95:515:45
1911.95:505:45
2011.95:495:46
2112.05:475:46
2212.05:465:47
2312.05:455:47
2412.15:445:48
2512.15:425:48
2612.15:415:49
2712.25:405:49
2812.25:395:50
2912.25:375:51
3012.25:365:51

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.58 kWh/m².

For context, solar energy here swings from a low near 3.15 kWh/m² to a high of 6.08 kWh/m² in January across the year — September's 4.58 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
14.3Bright
24.4Bright
34.4Bright
44.4Bright
54.4Bright
64.4Bright
74.5Bright
84.5Bright
94.5Bright
104.5Bright
114.5Bright
124.5Bright
134.5Bright
144.5Bright
154.6Bright
164.6Bright
174.6Bright
184.6Bright
194.6Bright
204.6Bright
214.7Bright
224.7Bright
234.7Bright
244.7Bright
254.7Bright
264.7Bright
274.7Bright
284.8Bright
294.8Bright
304.8Bright
Planning a trip in September

Hazard calendar for Mandeni

In seasonPeak

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

Mandeni sits in the South Indian Ocean cyclone belt; the season peaks January–March.

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

Is September a good time to visit Mandeni?

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

7.2
Sightseeing
5th-best month of the year
5.6
Beach & pool
8th-best month of the year

September is one of the better times to visit Mandeni for general sightseeing.

What to pack for Mandeni in September

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

In September, Mandeni sees daytime highs around 23°C and nights near 18°C. Worth packing: light clothes, rain gear and sun protection. About 9 days see rain.

light clothesrain gearsun protection

Sea temperature near Mandeni in September

The nearest coast averages about 21°C in September — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 21 km away) is warmest in February at about 26°C and coldest in August near 21°C.

The water stays above 20°C all year — warm enough for a swim any month.

20°22°24°26°28°JanFebMarAprMayJunJulAugSepOctNovDeccoolrefreshingwarmcomfortable to swim
Sea temperature (°C)Comfort
Jan25Warm
Feb26Warm
Mar25Warm
Apr24Warm
May23Refreshing
Jun22Refreshing
Jul21Refreshing
Aug21Refreshing
Sep21Refreshing
Oct22Refreshing
Nov23Refreshing
Dec24Refreshing

UV index in Mandeni in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 6 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Mandeni peaks around January 19 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 22 at about 4 (moderate).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeHighModerateHighVery highVery highExtremeJan 19UV 12Jun 22UV 4
UV index (midday)Level
Jan12Extreme
Feb12Extreme
Mar10Extreme
Apr6High
May5Moderate
Jun4Moderate
Jul4Moderate
Aug5High
Sep6High
Oct10Extreme
Nov10Very high
Dec12Extreme

Air quality in Mandeni 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 Mandeni is worst in July — around 43 µg/m³ PM2.5 (poor), about 5.5× the cleanest month (January, 8 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecGoodModeratePoorModerateGoodJul 1442 µg/m³Jan 198 µg/m³
PM2.5 (µg/m³)Level
Jan8Good
Feb9Good
Mar13Moderate
Apr20Moderate
May33Moderate
Jun40Poor
Jul43Poor
Aug35Poor
Sep29Moderate
Oct18Moderate
Nov14Moderate
Dec11Good
Location & terrain

Where is Mandeni?

Mandeni sits at 29.1°S, 31.4°E, 88 m above sea level, in South Africa. The nearest listed city is KwaDukuza, 24 km away.

Topography around Mandeni

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

Within 3 km, the terrain around Mandeni has only modest variations in elevation — a maximum elevation change of 213 m around an average of 90 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 593 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,667 m.

The land around Mandeni is covered by trees (56%) within 3 km, grassland (37%) and trees (35%) within 16 km, and trees (34%), water (26%) and grassland (25%) within 80 km.

3 km
213 m
16 km
593 m
80 km
1,667 m
treesshrubsgrasslandcroplandartificial surfaceswater
September weather nearby: KwaDukuza 24 km · Eshowe 29 km · Shakaskraal 39 km · Ballitoville 48 km · Tongaat 56 km · eSikhaleni 56 km · Empangeni 63 km · Richards Bay 73 km

South Africa travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type C / M / N
230 V · 50 Hz
Prices
≈ 41% of US
price level, 2025
GDP per capita
$6,598
2025
Happiness
5.0 / 10
World Happiness, 2025
Safe drinking water
68%
of population, 2024
Homicide rate
43.7
per 100k, 2022
Road deaths
22.2
per 100k/yr, 2019
Income group
Upper middle
World Bank
English
Very high
EF EPI 602
Religion
Christian 86%or other traditional African religions 5%nothing in particular 5%Muslim 2%

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 Mandeni (-29.1469°, 31.414°, elevation 88 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. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. 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).