Vaalwater weather in September

In September, Vaalwater sees average daytime highs of 27°C and overnight lows near 12°C, with 10 mm of rain across 1.8 wet days and about 11.8 hours of daylight. It is the 7th-warmest and 9th-wettest month of the year here.

Highs climb over the month, from about 26°C in the first days to 28°C by the end. The sky is clear or mostly clear about 79% 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 Vaalwater's 5th-clearest and 2nd-windiest month. For the whole year in context, see Vaalwater's year-round climate.

Daytime high
27°
7th warmest
Overnight low
12°
5th coldest
Rainfall
10 mm
1.8 wet days
Daylight
11 h 54 min
6:06 AM – 5:58 PM
Cloud cover
22%
5th clearest
Wind
10 km/h
2nd windiest
Solar energy
6.15 kWh/m²
Travel score
8.5
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 26°C in the first days to 28°C by the end.

A typical September day in Vaalwater reaches about 27°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 22°C and 31°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)
12511
22511
32611
42611
52611
62611
72611
82611
92612
102612
112712
122712
132712
142712
152712
162713
172713
182713
192713
202713
212713
222713
232813
242814
252814
262814
272814
282814
292814
302814

Vaalwater weather by month

How September compares with the rest of the year at a glance. September is the 7th-warmest and 9th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan28° / 18°10112.913.35.6
Feb28° / 18°779.612.86.0
Mar27° / 16°589.212.26.8
Apr25° / 13°334.711.48.0
May23° / 112.110.88.9
Jun21° / 5110.58.7
Jul21° / 30.610.68.7
Aug23° / 20.511.29.3
Sep27° / 12°101.811.88.5
Oct28° / 15°376.312.66.9
Nov28° / 17°7310.913.26.0
Dec28° / 18°961413.55.6

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 79% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 9% of September, with mostly cloudy or overcast conditions the remaining 12%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
19010
2919
3919
4919
59010
69010
7919
89010
99010
109010
118911
128911
138911
148812
158812
168812
178713
188713
198713
208713
218713
228614
238614
248614
258713
268614
278614
288614
298515
308515

Chance of precipitation in September

Any precipitation

Vaalwater gets around 10 mm of rain over 1.8 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 6% and peaks near 12% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%151015202530
Rain chance (%)
13
23
34
44
54
64
75
85
95
105
115
125
135
145
155
165
175
186
196
206
216
227
237
248
258
269
2710
2811
2911
3012

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
20991
21991
22991
23982
24973
25973
26964
27955
28946
29937
30937

Wind in September

Winds average 10 km/h in September.

Across September, daily wind ranges from about 10 km/h on the calmest days to 10 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
110calm
210calm
310calm
410calm
510calm
610calm
710calm
810calm
910calm
1010calm
1110calm
1210calm
1310calm
1410calm
1510calm
1610calm
1710calm
1810calm
1910calm
2010calm
2110calm
2210calm
2310calm
2410calm
2510calm
2610calm
2710calm
2810calm
2910calm
3010calm

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 6:22 AM to 5:51 AM, and sunset from 5:52 PM to 6:03 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.56:225:52
211.56:215:53
311.56:205:53
411.66:195:53
511.66:185:54
611.66:175:54
711.66:165:55
811.76:155:55
911.76:145:55
1011.76:135:56
1111.76:125:56
1211.86:105:56
1311.86:095:57
1411.86:085:57
1511.86:075:57
1611.96:065:58
1711.96:055:58
1811.96:045:58
1911.96:035:59
2012.06:025:59
2112.06:015:59
2212.05:596:00
2312.05:586:00
2412.15:576:01
2512.15:566:01
2612.15:556:01
2712.15:546:02
2812.25:536:02
2912.25:526:02
3012.25:516:03

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 6.15 kWh/m².

For context, solar energy here swings from a low near 4.06 kWh/m² to a high of 6.73 kWh/m² in October across the year — September's 6.15 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.7Bright
25.8Bright
35.8Bright
45.8Bright
55.8Bright
65.9Bright
75.9Bright
86.0Bright
96.0Bright
106.0Intense
116.0Intense
126.1Intense
136.1Intense
146.1Intense
156.2Intense
166.2Intense
176.2Intense
186.2Intense
196.3Intense
206.3Intense
216.3Intense
226.3Intense
236.3Intense
246.4Intense
256.4Intense
266.4Intense
276.4Intense
286.5Intense
296.5Intense
306.5Intense
Planning a trip in September

Hazard calendar for Vaalwater

In seasonPeak

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

Vaalwater's rainy season runs November–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 Vaalwater?

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

8.5
Sightseeing
5th-best month of the year
8.4
Beach & pool
1st-best month of the year

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

What to pack for Vaalwater in September

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

In September, Vaalwater sees daytime highs around 27°C and nights near 12°C. Pack sun protection. Worth having: light clothes.

sun protectionlight clothes

UV index in Vaalwater in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 10 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Vaalwater peaks around January 12 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 16 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 12UV 15Jun 16UV 5
UV index (midday)Level
Jan15Extreme
Feb13Extreme
Mar13Extreme
Apr9Very high
May6High
Jun5High
Jul6High
Aug8Very high
Sep10Very high
Oct10Extreme
Nov13Extreme
Dec14Extreme

Air quality in Vaalwater 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 Vaalwater is worst in September — around 17 µg/m³ PM2.5 (moderate), about 2.8× the cleanest month (December, 6 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1416 µg/m³Dec 196 µg/m³
PM2.5 (µg/m³)Level
Jan7Good
Feb9Good
Mar10Good
Apr12Moderate
May16Moderate
Jun15Moderate
Jul16Moderate
Aug14Moderate
Sep17Moderate
Oct12Moderate
Nov8Good
Dec6Good
Location & terrain

Where is Vaalwater?

Vaalwater sits at 24.3°S, 28.1°E, 1,188 m above sea level, in South Africa. The nearest listed city is Modimolle, 53 km away.

Topography around Vaalwater

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

Within 3 km, the terrain around Vaalwater has only modest variations in elevation — a maximum elevation change of 104 m around an average of 1,170 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 598 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,265 m.

The land around Vaalwater is covered by shrubs (40%) and grassland (32%) within 3 km, shrubs (61%) and grassland (27%) within 16 km, and shrubs (64%) and grassland (21%) within 80 km.

3 km
104 m
16 km
598 m
80 km
1,265 m
treesshrubsgrasslandcroplandartificial surfaces
September weather nearby: Modimolle 53 km · Mookgophong 66 km · Bela Bela 68 km · Thabazimbi 78 km · Lephalale 79 km · Marapong 87 km · Mokopane 91 km · Amandelbult 101 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 Vaalwater (-24.2957°, 28.1141°, elevation 1,188 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).