Cullinan weather in September

In September, Cullinan sees average daytime highs of 26°C and overnight lows near 12°C, with 18 mm of rain across 3 wet days and about 11.8 hours of daylight. It is the 7th-warmest and 8th-wettest month of the year here.

Highs climb over the month, from about 25°C in the first days to 27°C by the end. The sky is clear or mostly clear about 75% of the time in September, and the air most often feels dry.

Daylight stretches from about 11 h 30 min at the start of September to 12 h 12 min by month's end. Set against the rest of the year, September is Cullinan's 5th-clearest and 1st-windiest month. For the whole year in context, see Cullinan's year-round climate.

Daytime high
26°
7th warmest
Overnight low
12°
5th coldest
Rainfall
18 mm
3 wet days
Daylight
11 h 54 min
6:05 AM – 5:56 PM
Cloud cover
25%
5th clearest
Wind
12 km/h
1st windiest
Solar energy
6.03 kWh/m²
Travel score
8.5
out of 10

Cullinan is town in South Africa.

Founded
1903

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 25°C in the first days to 27°C by the end.

A typical September day in Cullinan reaches about 26°C in the afternoon and slips back to 12°C overnight — a 14°C spread between the day's warmth and the night's chill. On most days the high lands between 20°C and 30°C. Set against its neighbours, September runs about 4°C warmer than August and about 1°C cooler than October.

10°20°30°151015202530
Avg high (°C)Avg low (°C)
12410
22510
32510
42511
52511
62511
72511
82511
92511
102511
112611
122612
132612
142612
152612
162612
172612
182612
192612
202612
212613
222613
232613
242613
252613
262713
272713
282713
292713
302713

Cullinan weather by month

How September compares with the rest of the year at a glance. September is the 7th-warmest and 8th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan27° / 17°11214.713.45.9
Feb27° / 17°9711.912.96.2
Mar26° / 16°8910.912.26.8
Apr24° / 12°406.411.47.8
May22° / 152.410.88.6
Jun20° / 71.110.48.4
Jul19° / 40.810.68.5
Aug22° / 81.711.18.9
Sep26° / 12°18311.88.5
Oct27° / 14°709.512.67.0
Nov27° / 15°9712.913.36.2
Dec27° / 16°12116.213.65.7

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 75% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 11% of September, with mostly cloudy or overcast conditions the remaining 14%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
18911
28911
38911
49010
58911
68911
78911
88911
98812
108713
118713
128713
138713
148614
158614
168614
178614
188614
198515
208515
218515
228416
238416
248416
258416
268416
278317
288218
298119
308119

Chance of precipitation in September

Any precipitation

Cullinan gets around 18 mm of rain over 3 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 11% and peaks near 20% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%151015202530
Rain chance (%)
17
27
37
47
57
67
78
88
98
108
118
128
138
149
159
169
179
1810
1910
2011
2111
2212
2313
2414
2515
2616
2717
2818
2919
3020

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 99% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)
11000
21000
31000
41000
51000
61000
71000
81000
91000
101000
111000
121000
131000
141000
151000
161000
171000
181000
191000
201000
211000
22991
23991
24991
25982
26982
27973
28973
29964
30955

Wind in September

Winds average 12 km/h in September, the windiest month of the year.

Across September, daily wind ranges from about 12 km/h on the calmest days to 12 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
112calm
212calm
312calm
412calm
512calm
612calm
712calm
812calm
912calm
1012calm
1112calm
1212calm
1312calm
1412light breeze
1512light breeze
1612light breeze
1712light breeze
1812light breeze
1912light breeze
2012light breeze
2112light breeze
2212light breeze
2312light breeze
2412light breeze
2512light breeze
2612light breeze
2712light breeze
2812light breeze
2912light breeze
3012light breeze

Sunrise & sunset in September

DaylightNight

Daylight runs from about 11 h 30 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 42 minutes over September. Sunrise moves from 6:21 AM to 5:49 AM, and sunset from 5:50 PM to 6:02 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.56:215:50
211.56:205:50
311.56:195:51
411.56:185:51
511.66:175:51
611.66:165:52
711.66:155:52
811.66:145:53
911.76:135:53
1011.76:125:53
1111.76:105:54
1211.76:095:54
1311.86:085:55
1411.86:075:55
1511.86:065:55
1611.96:055:56
1711.96:045:56
1811.96:025:57
1911.96:015:57
2012.06:005:57
2112.05:595:58
2212.05:585:58
2312.05:575:59
2412.15:565:59
2512.15:545:59
2612.15:536:00
2712.15:526:00
2812.25:516:01
2912.25:506:01
3012.25:496:02

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 6.03 kWh/m².

For context, solar energy here swings from a low near 3.94 kWh/m² to a high of 6.64 kWh/m² in December across the year — September's 6.03 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.6Bright
25.6Bright
35.7Bright
45.7Bright
55.7Bright
65.8Bright
75.8Bright
85.8Bright
95.9Bright
105.9Bright
115.9Bright
125.9Bright
136.0Bright
146.0Intense
156.0Intense
166.0Intense
176.1Intense
186.1Intense
196.1Intense
206.2Intense
216.2Intense
226.2Intense
236.2Intense
246.2Intense
256.3Intense
266.3Intense
276.3Intense
286.3Intense
296.3Intense
306.3Intense
Planning a trip in September

Hazard calendar for Cullinan

In seasonPeak

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

Cullinan's rainy season runs October–March, 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 Cullinan?

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

8.5
Sightseeing
3rd-best month of the year
7.9
Beach & pool
1st-best month of the year

September is one of the better times to visit Cullinan for general sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Cullinan in September

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

In September, Cullinan sees daytime highs around 26°C and nights near 12°C. Pack sun protection. Worth having: light clothes. About 3 days see rain.

sun protectionlight clothes

UV index in Cullinan in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 9 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Cullinan peaks around January 1 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 17 at about 5 (high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highHighVery highExtremeJan 1UV 14Jun 17UV 5
UV index (midday)Level
Jan14Extreme
Feb13Extreme
Mar12Extreme
Apr8Very high
May6High
Jun5High
Jul6High
Aug7Very high
Sep9Very high
Oct11Extreme
Nov12Extreme
Dec14Extreme

Air quality in Cullinan 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 Cullinan is worst in July — around 188 µg/m³ PM2.5 (very unhealthy), about 6.6× the cleanest month (January, 29 µg/m³).

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

0306090120150180210JanFebMarAprMayJunJulAugSepOctNovDecModeratePoorUnhealthyVery unhealthyUnhealthyPoorJul 10187 µg/m³Jan 1229 µg/m³
PM2.5 (µg/m³)Level
Jan29Moderate
Feb43Poor
Mar67Unhealthy
Apr114Unhealthy
May169Very unhealthy
Jun185Very unhealthy
Jul188Very unhealthy
Aug142Unhealthy
Sep108Unhealthy
Oct62Unhealthy
Nov43Poor
Dec32Moderate
Location & terrain

Where is Cullinan?

Cullinan sits at 25.7°S, 28.5°E, 1,449 m above sea level, in South Africa. The nearest listed city is Ekangala, 21 km away.

Topography around Cullinan

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

Within 3 km, the terrain around Cullinan has only modest variations in elevation — a maximum elevation change of 184 m around an average of 1,438 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 418 m; within 80 km, large variations in elevation — a maximum elevation change of 909 m.

The land around Cullinan is covered by grassland (46%) within 3 km, grassland (61%) within 16 km, and grassland (49%) within 80 km.

3 km
184 m
16 km
418 m
80 km
909 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Ekangala 21 km · Moloto South 26 km · Bronkhorstspruit 27 km · Pretoria 35 km · Hammanskraal 38 km · Centurion 40 km · Midstream 43 km · Thembisa 47 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 Cullinan (-25.6709°, 28.5236°, elevation 1,449 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).