Acornhoek weather in September

In September, Acornhoek sees average daytime highs of 27°C and overnight lows near 15°C, with 17 mm of rain across 3.1 wet days and about 11.8 hours of daylight. It is the 7th-warmest and 8th-wettest month of the year here.

Day-to-day highs hold fairly steady near 27°C through the month. The sky is clear or mostly clear about 65% 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 Acornhoek's 5th-clearest and 2nd-windiest month. For the whole year in context, see Acornhoek's year-round climate.

Daytime high: 27°; 7th warmest
Overnight low: 15°; 5th coldest
Rainfall: 17 mm; 3.1 wet days
Daylight: 11 h 54 min; 5:54 AM – 5:46 PM
Cloud cover: 32%; 5th clearest
Wind: 10 km/h; 2nd windiest
Solar energy: 5.34 kWh/m²
Travel score: 8.1; out of 10

← August Acornhoek year-round climate October →Best places to visit in September

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

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 27°C through the month.

A typical September day in Acornhoek reaches about 27°C in the afternoon and slips back to 15°C overnight — a 12°C spread between the day's warmth and the night's chill. On most days the high lands between 20°C and 33°C. Set against its neighbours, September runs about 2°C warmer than August and on par with October.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Avg high (°C)	26	26	26	26	27	27	27	27	27	27	27	27	27	27	27	27	27	27	27	27	27	27	27	27	27	27	27	27	27	27
Avg low (°C)	14	14	14	14	14	14	14	14	14	15	15	15	15	15	15	15	15	15	15	15	15	16	16	16	16	16	16	16	16	16

	Avg high (°C)	Avg low (°C)
1	26	14
2	26	14
3	26	14
4	26	14
5	27	14
6	27	14
7	27	14
8	27	14
9	27	14
10	27	15
11	27	15
12	27	15
13	27	15
14	27	15
15	27	15
16	27	15
17	27	15
18	27	15
19	27	15
20	27	15
21	27	15
22	27	16
23	27	16
24	27	16
25	27	16
26	27	16
27	27	16
28	27	16
29	27	16
30	27	16

Acornhoek 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.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Daylight (hours)	Travel score
Jan	29° / 20°	110	11.9	13.4	5.1
Feb	29° / 20°	87	9.6	12.9	5.3
Mar	29° / 19°	61	8.9	12.2	6.1
Apr	27° / 17°	35	5.2	11.4	7.5
May	26° / 13°	10	2.2	10.8	8.7
Jun	24° / 11°	4	1.1	10.5	9.2
Jul	23° / 10°	5	1	10.6	9.1
Aug	25° / 12°	8	1.6	11.1	8.9
Sep	27° / 15°	17	3.1	11.8	8.1
Oct	27° / 17°	37	6	12.6	7.1
Nov	28° / 18°	85	10.6	13.2	5.7
Dec	29° / 19°	109	12.6	13.5	5.2

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 65% 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 24%. Skies tend to cloud over as the month goes on.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Clearer (%)	83	82	82	82	80	80	80	79	79	78	78	77	77	76	76	76	76	76	75	75	75	75	73	73	72	72	71	70	69	69
Cloudier (%)	17	18	18	18	20	20	20	21	21	22	22	23	23	24	24	24	24	24	25	25	25	25	27	27	28	28	29	30	31	31

	Clearer (%)	Cloudier (%)
1	83	17
2	82	18
3	82	18
4	82	18
5	80	20
6	80	20
7	80	20
8	79	21
9	79	21
10	78	22
11	78	22
12	77	23
13	77	23
14	76	24
15	76	24
16	76	24
17	76	24
18	76	24
19	75	25
20	75	25
21	75	25
22	75	25
23	73	27
24	73	27
25	72	28
26	72	28
27	71	29
28	70	30
29	69	31
30	69	31

Chance of precipitation in September

Any precipitation

Acornhoek gets around 17 mm of rain over 3.1 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 10% and peaks near 15% on the wettest days. The odds climb toward the end of the month.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Rain chance (%)	6	6	7	7	7	7	7	8	8	8	8	8	8	9	9	9	9	9	10	10	11	12	12	13	14	14	15	15	15	15

	Rain chance (%)
1	6
2	6
3	7
4	7
5	7
6	7
7	7
8	8
9	8
10	8
11	8
12	8
13	8
14	9
15	9
16	9
17	9
18	9
19	10
20	10
21	11
22	12
23	12
24	13
25	14
26	14
27	15
28	15
29	15
30	15

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 75% of days. It rarely turns muggy — the humid and sticky bands barely register.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Dry (%)	90	89	89	88	87	87	86	85	84	83	81	80	79	78	77	76	75	74	72	70	69	68	66	66	64	63	61	60	59	58
Comfortable (%)	10	11	11	12	13	13	14	15	16	17	18	19	20	21	22	23	24	25	27	28	29	30	31	31	32	33	34	35	35	36
Humid (%)	0	0	0	0	0	0	0	0	0	0	1	1	1	1	1	1	1	1	1	2	2	2	3	3	4	4	5	5	6	6

	Dry (%)	Comfortable (%)	Humid (%)
1	90	10	0
2	89	11	0
3	89	11	0
4	88	12	0
5	87	13	0
6	87	13	0
7	86	14	0
8	85	15	0
9	84	16	0
10	83	17	0
11	81	18	1
12	80	19	1
13	79	20	1
14	78	21	1
15	77	22	1
16	76	23	1
17	75	24	1
18	74	25	1
19	72	27	1
20	70	28	2
21	69	29	2
22	68	30	2
23	66	31	3
24	66	31	3
25	64	32	4
26	63	33	4
27	61	34	5
28	60	35	5
29	59	35	6
30	58	36	6

Wind in September

Winds average 10 km/h in September.

Across September, daily wind ranges from about 9 km/h on the calmest days to 10 km/h at its breeziest. It stays fairly steady from day to day.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Wind speed (km/h)	9	9	9	9	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10
Feels	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm

	Wind speed (km/h)	Feels
1	9	calm
2	9	calm
3	9	calm
4	9	calm
5	10	calm
6	10	calm
7	10	calm
8	10	calm
9	10	calm
10	10	calm
11	10	calm
12	10	calm
13	10	calm
14	10	calm
15	10	calm
16	10	calm
17	10	calm
18	10	calm
19	10	calm
20	10	calm
21	10	calm
22	10	calm
23	10	calm
24	10	calm
25	10	calm
26	10	calm
27	10	calm
28	10	calm
29	10	calm
30	10	calm

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 6:10 AM to 5:39 AM, and sunset from 5:40 PM to 5:51 PM.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Daylight (h)	11.5	11.5	11.5	11.6	11.6	11.6	11.6	11.7	11.7	11.7	11.7	11.8	11.8	11.8	11.8	11.9	11.9	11.9	11.9	12.0	12.0	12.0	12.0	12.1	12.1	12.1	12.1	12.2	12.2	12.2
Sunrise (AM)	6:10	6:09	6:08	6:07	6:06	6:05	6:04	6:03	6:02	6:01	6:00	5:59	5:58	5:56	5:55	5:54	5:53	5:52	5:51	5:50	5:49	5:48	5:46	5:45	5:44	5:43	5:42	5:41	5:40	5:39
Sunset (PM)	5:40	5:41	5:41	5:41	5:42	5:42	5:42	5:43	5:43	5:44	5:44	5:44	5:45	5:45	5:45	5:46	5:46	5:46	5:47	5:47	5:48	5:48	5:48	5:49	5:49	5:49	5:50	5:50	5:51	5:51

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	11.5	6:10	5:40
2	11.5	6:09	5:41
3	11.5	6:08	5:41
4	11.6	6:07	5:41
5	11.6	6:06	5:42
6	11.6	6:05	5:42
7	11.6	6:04	5:42
8	11.7	6:03	5:43
9	11.7	6:02	5:43
10	11.7	6:01	5:44
11	11.7	6:00	5:44
12	11.8	5:59	5:44
13	11.8	5:58	5:45
14	11.8	5:56	5:45
15	11.8	5:55	5:45
16	11.9	5:54	5:46
17	11.9	5:53	5:46
18	11.9	5:52	5:46
19	11.9	5:51	5:47
20	12.0	5:50	5:47
21	12.0	5:49	5:48
22	12.0	5:48	5:48
23	12.0	5:46	5:48
24	12.1	5:45	5:49
25	12.1	5:44	5:49
26	12.1	5:43	5:49
27	12.1	5:42	5:50
28	12.2	5:41	5:50
29	12.2	5:40	5:51
30	12.2	5:39	5:51

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.34 kWh/m².

For context, solar energy here swings from a low near 3.78 kWh/m² to a high of 5.99 kWh/m² in January across the year — September's 5.34 kWh/m² falls in the middle.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Solar energy (kWh/m²)	5.1	5.1	5.1	5.2	5.2	5.2	5.2	5.2	5.3	5.3	5.3	5.3	5.3	5.3	5.3	5.3	5.4	5.4	5.4	5.4	5.4	5.4	5.4	5.4	5.5	5.5	5.5	5.5	5.5	5.5
Level	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright

	Solar energy (kWh/m²)	Level
1	5.1	Bright
2	5.1	Bright
3	5.1	Bright
4	5.2	Bright
5	5.2	Bright
6	5.2	Bright
7	5.2	Bright
8	5.2	Bright
9	5.3	Bright
10	5.3	Bright
11	5.3	Bright
12	5.3	Bright
13	5.3	Bright
14	5.3	Bright
15	5.3	Bright
16	5.3	Bright
17	5.4	Bright
18	5.4	Bright
19	5.4	Bright
20	5.4	Bright
21	5.4	Bright
22	5.4	Bright
23	5.4	Bright
24	5.4	Bright
25	5.5	Bright
26	5.5	Bright
27	5.5	Bright
28	5.5	Bright
29	5.5	Bright
30	5.5	Bright

Planning a trip in September

Hazard calendar for Acornhoek

In seasonPeak

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

Acornhoek'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 Acornhoek?

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

8.1

Sightseeing

5th-best month of the year

8.1

Beach & pool

1st-best month of the year

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

What to pack for Acornhoek in September

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

In September, Acornhoek sees daytime highs around 27°C and nights near 15°C. Worth packing: light clothes and sun protection. About 3 days see rain.

light clothessun protection

UV index in Acornhoek in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 8 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Acornhoek peaks around January 20 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 20 at about 5 (high).

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

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
UV index (midday)	14	13	12	8	6	5	5	7	8	10	12	12
Level	Extreme	Extreme	Extreme	Very high	High	Moderate	High	Very high	Very high	Very high	Extreme	Extreme

	UV index (midday)	Level
Jan	14	Extreme
Feb	13	Extreme
Mar	12	Extreme
Apr	8	Very high
May	6	High
Jun	5	Moderate
Jul	5	High
Aug	7	Very high
Sep	8	Very high
Oct	10	Very high
Nov	12	Extreme
Dec	12	Extreme

Air quality in Acornhoek 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 Acornhoek is worst in July — around 40 µg/m³ PM2.5 (poor), about 2.9× the cleanest month (December, 14 µg/m³).

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

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
PM2.5 (µg/m³)	14	15	20	26	35	36	40	38	30	20	20	14
Level	Moderate	Moderate	Moderate	Moderate	Poor	Poor	Poor	Poor	Moderate	Moderate	Moderate	Moderate

	PM2.5 (µg/m³)	Level
Jan	14	Moderate
Feb	15	Moderate
Mar	20	Moderate
Apr	26	Moderate
May	35	Poor
Jun	36	Poor
Jul	40	Poor
Aug	38	Poor
Sep	30	Moderate
Oct	20	Moderate
Nov	20	Moderate
Dec	14	Moderate

Location & terrain

Where is Acornhoek?

Acornhoek sits at 24.6°S, 31.1°E, 645 m above sea level, in South Africa. The nearest listed city is Thulamahashi, 19 km away.

Topography around Acornhoek

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

Within 3 km, the terrain around Acornhoek has only modest variations in elevation — a maximum elevation change of 140 m around an average of 628 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 459 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,498 m.

The land around Acornhoek is covered by artificial surfaces (40%) and grassland (38%) within 3 km, grassland (33%), trees (27%) and shrubs (27%) within 16 km, and shrubs (39%), grassland (37%) and trees (20%) within 80 km.

3 km

140 m

artificial surfaces 40%

16 km

459 m

grassland 33%

80 km

2,498 m

shrubs 39%

treesshrubsgrasslandcroplandartificial surfaces

← August Acornhoek year-round climate October →Best places to visit in September

September weather nearby: Thulamahashi 19 km · Mafemani 22 km · Dwarsloop 23 km · Hlanganani 42 km · Calcutta 46 km · Mkhuhlu 47 km · Sabie 65 km · Phalaborwa 72 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

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 Acornhoek (-24.5878°, 31.0947°, elevation 645 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).

	Avg high (°C)	Avg low (°C)
1	26	14
2	26	14
3	26	14
4	26	14
5	27	14
6	27	14
7	27	14
8	27	14
9	27	14
10	27	15
11	27	15
12	27	15
13	27	15
14	27	15
15	27	15
16	27	15
17	27	15
18	27	15
19	27	15
20	27	15
21	27	15
22	27	16
23	27	16
24	27	16
25	27	16
26	27	16
27	27	16
28	27	16
29	27	16
30	27	16

	Clearer (%)	Cloudier (%)
1	83	17
2	82	18
3	82	18
4	82	18
5	80	20
6	80	20
7	80	20
8	79	21
9	79	21
10	78	22
11	78	22
12	77	23
13	77	23
14	76	24
15	76	24
16	76	24
17	76	24
18	76	24
19	75	25
20	75	25
21	75	25
22	75	25
23	73	27
24	73	27
25	72	28
26	72	28
27	71	29
28	70	30
29	69	31
30	69	31

	Rain chance (%)
1	6
2	6
3	7
4	7
5	7
6	7
7	7
8	8
9	8
10	8
11	8
12	8
13	8
14	9
15	9
16	9
17	9
18	9
19	10
20	10
21	11
22	12
23	12
24	13
25	14
26	14
27	15
28	15
29	15
30	15

	Dry (%)	Comfortable (%)	Humid (%)
1	90	10	0
2	89	11	0
3	89	11	0
4	88	12	0
5	87	13	0
6	87	13	0
7	86	14	0
8	85	15	0
9	84	16	0
10	83	17	0
11	81	18	1
12	80	19	1
13	79	20	1
14	78	21	1
15	77	22	1
16	76	23	1
17	75	24	1
18	74	25	1
19	72	27	1
20	70	28	2
21	69	29	2
22	68	30	2
23	66	31	3
24	66	31	3
25	64	32	4
26	63	33	4
27	61	34	5
28	60	35	5
29	59	35	6
30	58	36	6

	Avg high (°C)	Avg low (°C)
1	26	14
2	26	14
3	26	14
4	26	14
5	27	14
6	27	14
7	27	14
8	27	14
9	27	14
10	27	15
11	27	15
12	27	15
13	27	15
14	27	15
15	27	15
16	27	15
17	27	15
18	27	15
19	27	15
20	27	15
21	27	15
22	27	16
23	27	16
24	27	16
25	27	16
26	27	16
27	27	16
28	27	16
29	27	16
30	27	16

	Clearer (%)	Cloudier (%)
1	83	17
2	82	18
3	82	18
4	82	18
5	80	20
6	80	20
7	80	20
8	79	21
9	79	21
10	78	22
11	78	22
12	77	23
13	77	23
14	76	24
15	76	24
16	76	24
17	76	24
18	76	24
19	75	25
20	75	25
21	75	25
22	75	25
23	73	27
24	73	27
25	72	28
26	72	28
27	71	29
28	70	30
29	69	31
30	69	31

	Rain chance (%)
1	6
2	6
3	7
4	7
5	7
6	7
7	7
8	8
9	8
10	8
11	8
12	8
13	8
14	9
15	9
16	9
17	9
18	9
19	10
20	10
21	11
22	12
23	12
24	13
25	14
26	14
27	15
28	15
29	15
30	15

	Dry (%)	Comfortable (%)	Humid (%)
1	90	10	0
2	89	11	0
3	89	11	0
4	88	12	0
5	87	13	0
6	87	13	0
7	86	14	0
8	85	15	0
9	84	16	0
10	83	17	0
11	81	18	1
12	80	19	1
13	79	20	1
14	78	21	1
15	77	22	1
16	76	23	1
17	75	24	1
18	74	25	1
19	72	27	1
20	70	28	2
21	69	29	2
22	68	30	2
23	66	31	3
24	66	31	3
25	64	32	4
26	63	33	4
27	61	34	5
28	60	35	5
29	59	35	6
30	58	36	6

	Avg high (°C)	Avg low (°C)
1	26	14
2	26	14
3	26	14
4	26	14
5	27	14
6	27	14
7	27	14
8	27	14
9	27	14
10	27	15
11	27	15
12	27	15
13	27	15
14	27	15
15	27	15
16	27	15
17	27	15
18	27	15
19	27	15
20	27	15
21	27	15
22	27	16
23	27	16
24	27	16
25	27	16
26	27	16
27	27	16
28	27	16
29	27	16
30	27	16

	Clearer (%)	Cloudier (%)
1	83	17
2	82	18
3	82	18
4	82	18
5	80	20
6	80	20
7	80	20
8	79	21
9	79	21
10	78	22
11	78	22
12	77	23
13	77	23
14	76	24
15	76	24
16	76	24
17	76	24
18	76	24
19	75	25
20	75	25
21	75	25
22	75	25
23	73	27
24	73	27
25	72	28
26	72	28
27	71	29
28	70	30
29	69	31
30	69	31

	Rain chance (%)
1	6
2	6
3	7
4	7
5	7
6	7
7	7
8	8
9	8
10	8
11	8
12	8
13	8
14	9
15	9
16	9
17	9
18	9
19	10
20	10
21	11
22	12
23	12
24	13
25	14
26	14
27	15
28	15
29	15
30	15

	Dry (%)	Comfortable (%)	Humid (%)
1	90	10	0
2	89	11	0
3	89	11	0
4	88	12	0
5	87	13	0
6	87	13	0
7	86	14	0
8	85	15	0
9	84	16	0
10	83	17	0
11	81	18	1
12	80	19	1
13	79	20	1
14	78	21	1
15	77	22	1
16	76	23	1
17	75	24	1
18	74	25	1
19	72	27	1
20	70	28	2
21	69	29	2
22	68	30	2
23	66	31	3
24	66	31	3
25	64	32	4
26	63	33	4
27	61	34	5
28	60	35	5
29	59	35	6
30	58	36	6