Wellington weather in September

In September, Wellington sees average daytime highs of 19°C and overnight lows near 8°C, with 77 mm of rain across 8.7 wet days and about 11.8 hours of daylight. It is the 9th-warmest and 5th-wettest month of the year here.

Highs climb over the month, from about 18°C in the first days to 20°C by the end. The sky is clear or mostly clear about 40% of the time in September, and the air most often feels dry.

Daylight stretches from about 11 h 18 min at the start of September to 12 h 18 min by month's end. Set against the rest of the year, September is Wellington's 12th-clearest and 7th-windiest month. For the whole year in context, see Wellington's year-round climate.

Daytime high
19°
9th warmest
Overnight low
4th coldest
Rainfall
77 mm
8.7 wet days
Daylight
11 h 48 min
6:44 AM – 6:32 PM
Cloud cover
50%
12th clearest
Wind
9 km/h
7th windiest
Solar energy
4.8 kWh/m²
Travel score
6.3
out of 10

Wellington is town in the Western Cape, South Africa.

Founded
1840

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

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 18°C in the first days to 20°C by the end.

A typical September day in Wellington reaches about 19°C in the afternoon and slips back to 8°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 13°C and 25°C. Set against its neighbours, September runs about 2°C warmer than August and about 3°C cooler than October.

10°20°30°151015202530
Avg high (°C)Avg low (°C)
1177
2187
3187
4187
5188
6188
7188
8188
9188
10188
11188
12188
13188
14198
15198
16198
17198
18198
19198
20198
21198
22198
23198
24198
25198
26199
27199
28209
29209
30209

Wellington weather by month

How September compares with the rest of the year at a glance. September is the 9th-warmest and 5th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan29° / 16°213.1147.3
Feb29° / 16°172.813.37.2
Mar27° / 15°213.312.38.0
Apr24° / 12°575.611.27.9
May20° / 998.310.36.8
Jun17° / 15210.79.85.4
Jul16° / 1309.9105.4
Aug17° / 11010.610.85.4
Sep19° / 778.711.86.3
Oct22° / 10°476.112.87.4
Nov24° / 12°44613.77.9
Dec27° / 15°254.414.28.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 40% of the time in September, the cloudiest month of the year.

Beyond those clear spells, partly cloudy skies cover about 16% of September, with mostly cloudy or overcast conditions the remaining 45%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15149
25149
35149
45149
55248
65248
75347
85347
95446
105446
115545
125545
135545
145644
155743
165743
175743
185644
195644
205644
215644
225743
235644
245743
255743
265842
275743
285743
295842
305842

Chance of precipitation in September

Any precipitation

Wellington gets around 77 mm of rain over 8.7 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 29% and peaks near 32% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%40%151015202530
Rain chance (%)
132
232
332
431
531
630
730
830
929
1029
1129
1229
1329
1429
1529
1629
1729
1829
1929
2029
2129
2229
2328
2428
2527
2626
2725
2825
2924
3024

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the dry band about 98% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)
1991
2991
3991
4991
5991
6991
7991
8991
9982
10982
11982
12982
13982
14982
15982
16982
17982
18982
19982
20982
21982
22982
23982
24982
25982
26982
27982
28982
29982
30973

Wind in September

Winds average 9 km/h in September.

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

051015151015202530
Wind speed (km/h)Feels
19calm
29calm
39calm
49calm
59calm
69calm
79calm
89calm
99calm
109calm
119calm
129calm
139calm
149calm
159calm
169calm
179calm
189calm
199calm
209calm
219calm
229calm
239calm
249calm
259calm
269calm
279calm
289calm
299calm
309calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 11 h 18 min at the start of September to 12 h 18 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 60 minutes over September. Sunrise moves from 7:06 AM to 6:24 AM, and sunset from 6:22 PM to 6:42 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.37:066:22
211.37:046:22
311.37:036:23
411.47:026:24
511.47:006:24
611.46:596:25
711.56:576:26
811.56:566:27
911.56:546:27
1011.66:536:28
1111.66:526:29
1211.76:506:29
1311.76:496:30
1411.76:476:31
1511.86:466:31
1611.86:446:32
1711.86:436:33
1811.96:426:34
1911.96:406:34
2011.96:396:35
2112.06:376:36
2212.06:366:36
2312.06:346:37
2412.16:336:38
2512.16:316:38
2612.26:306:39
2712.26:296:40
2812.26:276:41
2912.36:266:41
3012.36:246:42

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.8 kWh/m².

For context, solar energy here swings from a low near 2.5 kWh/m² to a high of 8.2 kWh/m² in January across the year — September's 4.8 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
14.1Bright
24.1Bright
34.2Bright
44.2Bright
54.3Bright
64.3Bright
74.4Bright
84.4Bright
94.5Bright
104.5Bright
114.6Bright
124.6Bright
134.7Bright
144.7Bright
154.8Bright
164.8Bright
174.9Bright
184.9Bright
195.0Bright
205.0Bright
215.1Bright
225.1Bright
235.2Bright
245.2Bright
255.3Bright
265.3Bright
275.4Bright
285.5Bright
295.5Bright
305.6Bright
Planning a trip in September

Hazard calendar for Wellington

In seasonPeak

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

Wellington's rainy season runs May–September, 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 Wellington?

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

6.3
Sightseeing
9th-best month of the year
2.5
Beach & pool
9th-best month of the year

September is a reasonable time to visit Wellington for sightseeing.

What to pack for Wellington in September

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

In September, Wellington sees daytime highs around 19°C and nights near 8°C. Worth packing: rain gear and sun protection. About 9 days see rain.

rain gearsun protection

Sea temperature near Wellington in September

The nearest coast averages about 15°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 55 km away) is warmest in January at about 19°C and coldest in July near 15°C.

The water stays below 20°C all year — cool enough that most swimmers want a wetsuit.

14°16°18°20°JanFebMarAprMayJunJulAugSepOctNovDecbracingcool
Sea temperature (°C)Comfort
Jan19Cool
Feb18Cool
Mar17Cool
Apr16Cool
May16Cool
Jun15Cool
Jul15Bracing
Aug15Bracing
Sep15Cool
Oct16Cool
Nov17Cool
Dec18Cool

UV index in Wellington 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 Wellington peaks around January 13 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 19 at about 3 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 11 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highModerateHighExtremeJan 13UV 13Jun 19UV 3
UV index (midday)Level
Jan14Extreme
Feb10Very high
Mar10Very high
Apr6High
May4Moderate
Jun3Moderate
Jul3Moderate
Aug5Moderate
Sep6High
Oct10Extreme
Nov12Extreme
Dec12Extreme

Air quality in Wellington 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 Wellington is worst in May — around 52 µg/m³ PM2.5 (poor), about 3.4× the cleanest month (December, 15 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecModeratePoorModerateMay 2152 µg/m³Dec 1516 µg/m³
PM2.5 (µg/m³)Level
Jan20Moderate
Feb19Moderate
Mar28Moderate
Apr41Poor
May52Poor
Jun50Poor
Jul47Poor
Aug41Poor
Sep33Moderate
Oct29Moderate
Nov18Moderate
Dec15Moderate
Location & terrain

Where is Wellington?

Wellington sits at 33.6°S, 19.0°E, 127 m above sea level, in South Africa. The nearest listed city is Paarl, 11 km away.

Topography around Wellington

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

Within 3 km, the terrain around Wellington has only modest variations in elevation — a maximum elevation change of 164 m around an average of 147 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,646 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,256 m.

The land around Wellington is covered by cropland (44%), artificial surfaces (21%) and grassland (20%) within 3 km, grassland (42%) and cropland (31%) within 16 km, and grassland (34%) and cropland (27%) within 80 km.

3 km
164 m
16 km
1,646 m
80 km
2,256 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Paarl 11 km · Le Roux 29 km · Franschhoek 32 km · Malmesbury 33 km · Stellenbosch 35 km · Kraaifontein 36 km · Durbanville 40 km · Worcester 40 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 Wellington (-33.6398°, 19.0112°, elevation 127 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. 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).