Gonubie weather in September

In September, Gonubie sees average daytime highs of 20°C and overnight lows near 15°C, with 57 mm of rain across 7.6 wet days and about 11.8 hours of daylight. It is the 11th-warmest and 8th-wettest month of the year here.

Day-to-day highs hold fairly steady near 20°C through the month. The sky is clear or mostly clear about 43% 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 Gonubie's 5th-clearest and 3rd-windiest month. For the whole year in context, see Gonubie's year-round climate.

Daytime high
20°
11th warmest
Overnight low
15°
4th coldest
Rainfall
57 mm
7.6 wet days
Daylight
11 h 48 min
6:08 AM – 5:56 PM
Cloud cover
48%
5th clearest
Wind
19 km/h
3rd windiest
Solar energy
4.66 kWh/m²
Travel score
6.8
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 20°C through the month.

A typical September day in Gonubie reaches about 20°C in the afternoon and slips back to 15°C overnight — a 5°C spread between the day's warmth and the night's chill. On most days the high lands between 17°C and 23°C. Set against its neighbours, September runs on par with August and on par with October.

10°15°20°25°151015202530
Avg high (°C)Avg low (°C)
12015
22015
32015
42015
52015
62015
72015
82015
92015
102015
112015
122015
132015
142015
152015
162015
172015
182015
192015
202015
212015
222016
232016
242016
252016
262016
272016
282016
292016
302016

Gonubie weather by month

How September compares with the rest of the year at a glance. September is the 11th-warmest and 8th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan24° / 21°8111.613.96.7
Feb25° / 21°8410.913.26.6
Mar24° / 20°9012.112.36.8
Apr23° / 19°859.611.27.0
May22° / 17°345.710.37.7
Jun21° / 15°344.59.97.7
Jul20° / 14°385.1107.6
Aug20° / 14°476.910.87.1
Sep20° / 15°577.611.86.8
Oct21° / 17°7711.312.86.3
Nov22° / 18°8411.613.76.3
Dec23° / 19°8312.514.16.5

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 43% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 17% of September, with mostly cloudy or overcast conditions the remaining 40%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
16733
26733
36634
46535
56535
66436
76436
86238
96238
106238
116139
126139
136040
145941
155941
165842
175941
185941
195941
205941
215941
225842
235842
245842
255743
265743
275644
285545
295545
305545

Chance of precipitation in September

Any precipitation

Gonubie gets around 57 mm of rain over 7.6 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 26% and peaks near 29% on the wettest days.

0%10%20%30%40%151015202530
Rain chance (%)
123
223
323
424
524
625
725
825
926
1026
1126
1226
1326
1426
1526
1626
1727
1826
1926
2026
2126
2226
2327
2427
2527
2627
2728
2828
2929
3029

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 47% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)
154406
253416
353416
451427
551427
651427
750428
850428
949429
10494110
11484111
12484012
13484013
14483914
15473814
16473815
17473815
18473716
19473716
20463716
21463716
22463817
23453817
24453817
25443917
26433918
27423918
28424019
29414019
30404020

Wind in September

Winds average 19 km/h in September.

Across September, daily wind ranges from about 19 km/h on the calmest days to 20 km/h at its breeziest. It stays fairly steady from day to day.

0510152025151015202530
Wind speed (km/h)Feels
119light breeze
219light breeze
319light breeze
419light breeze
519light breeze
619light breeze
719light breeze
819light breeze
919light breeze
1019light breeze
1119light breeze
1219light breeze
1319light breeze
1419light breeze
1520light breeze
1620light breeze
1720light breeze
1820light breeze
1920light breeze
2020light breeze
2120light breeze
2220light breeze
2320light breeze
2420light breeze
2520light breeze
2620light breeze
2720light breeze
2820light breeze
2920light breeze
3020light breeze

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 6:29 AM to 5:49 AM, and sunset from 5:46 PM to 6:06 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.36:295:46
211.36:285:47
311.46:265:48
411.46:255:48
511.46:245:49
611.56:225:50
711.56:215:50
811.56:205:51
911.66:185:52
1011.66:175:52
1111.66:155:53
1211.76:145:54
1311.76:135:54
1411.76:115:55
1511.86:105:56
1611.86:085:56
1711.86:075:57
1811.96:055:58
1911.96:045:58
2011.96:035:59
2112.06:016:00
2212.06:006:00
2312.05:586:01
2412.15:576:02
2512.15:566:02
2612.15:546:03
2712.25:536:04
2812.25:516:04
2912.35:506:05
3012.35:496:06

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.66 kWh/m².

For context, solar energy here swings from a low near 2.84 kWh/m² to a high of 6.28 kWh/m² in December across the year — September's 4.66 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
14.2Bright
24.3Bright
34.3Bright
44.3Bright
54.3Bright
64.3Bright
74.4Bright
84.4Bright
94.4Bright
104.5Bright
114.5Bright
124.5Bright
134.5Bright
144.6Bright
154.6Bright
164.6Bright
174.7Bright
184.7Bright
194.7Bright
204.8Bright
214.8Bright
224.8Bright
234.8Bright
244.9Bright
254.9Bright
264.9Bright
274.9Bright
285.0Bright
295.0Bright
305.0Bright
Planning a trip in September

Is September a good time to visit Gonubie?

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

6.8
Sightseeing
6th-best month of the year
3.5
Beach & pool
12th-best month of the year

September is a reasonable time to visit Gonubie for sightseeing.

What to pack for Gonubie in September

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

In September, Gonubie sees daytime highs around 20°C and nights near 15°C. Worth packing: sun protection. About 8 days see rain.

sun protection

Sea temperature near Gonubie 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 13 km away) is warmest in February at about 25°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°JanFebMarAprMayJunJulAugSepOctNovDeccoolrefreshingwarmcomfortable to swim
Sea temperature (°C)Comfort
Jan24Warm
Feb25Warm
Mar25Warm
Apr24Warm
May23Refreshing
Jun22Refreshing
Jul21Refreshing
Aug21Refreshing
Sep21Refreshing
Oct21Refreshing
Nov22Refreshing
Dec23Refreshing

UV index in Gonubie 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 Gonubie peaks around January 16 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 23 at about 3 (moderate).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highHighModerateHighExtremeJan 16UV 13Jun 23UV 3
UV index (midday)Level
Jan13Extreme
Feb11Extreme
Mar9Very high
Apr6High
May4Moderate
Jun3Moderate
Jul3Moderate
Aug5Moderate
Sep6High
Oct10Very high
Nov11Extreme
Dec11Extreme

Air quality in Gonubie 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 Gonubie is worst in August — around 20 µg/m³ PM2.5 (moderate), about 2.6× the cleanest month (February, 8 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodAug 1520 µg/m³Feb 98 µg/m³
PM2.5 (µg/m³)Level
Jan8Good
Feb8Good
Mar9Good
Apr12Good
May15Moderate
Jun17Moderate
Jul17Moderate
Aug20Moderate
Sep16Moderate
Oct12Moderate
Nov9Good
Dec8Good
Location & terrain

Where is Gonubie?

Gonubie sits at 32.9°S, 28.0°E, 30 m above sea level, in South Africa. The nearest listed city is East London, 12 km away.

Topography around Gonubie

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

Within 3 km, the terrain around Gonubie has only modest variations in elevation — a maximum elevation change of 102 m around an average of 25 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 336 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,505 m.

The land around Gonubie is covered by water (42%) and trees (29%) within 3 km, water (50%) and trees (28%) within 16 km, and water (33%), grassland (32%) and trees (25%) within 80 km.

3 km
102 m
16 km
336 m
80 km
1,505 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: East London 12 km · Mdantsane 22 km · Ndevana 47 km · Bhisho 55 km · Qonce 58 km · Stutterheim 69 km · Butterworth 69 km · Dimbaza 75 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 Gonubie (-32.9443°, 28.015°, elevation 30 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).