Humansdorp weather in September

In September, Humansdorp sees average daytime highs of 19°C and overnight lows near 12°C, with 38 mm of rain across 7.1 wet days and about 11.8 hours of daylight. It is the 9th-warmest and 9th-wettest month of the year here.

Day-to-day highs hold fairly steady near 19°C through the month. The sky is clear or mostly clear about 41% 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 Humansdorp's 10th-clearest and 4th-windiest month. For the whole year in context, see Humansdorp's year-round climate.

Daytime high
19°
9th warmest
Overnight low
12°
4th coldest
Rainfall
38 mm
7.1 wet days
Daylight
11 h 48 min
6:22 AM – 6:09 PM
Cloud cover
48%
10th clearest
Wind
15 km/h
4th windiest
Solar energy
4.74 kWh/m²
Travel score
6.8
out of 10

Humansdorp is town in the Eastern Cape, South Africa.

Density
1,007/km²
people per km²
Founded
1849

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

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 19°C through the month.

A typical September day in Humansdorp reaches about 19°C in the afternoon and slips back to 12°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 15°C and 24°C. Set against its neighbours, September runs on par with August and about 1°C cooler than October.

10°15°20°25°151015202530
Avg high (°C)Avg low (°C)
11911
21911
31912
41912
51912
61912
71912
81912
91912
101912
111912
121912
131912
141912
151912
161912
171912
181912
191912
201912
211912
221912
232012
242012
252012
262012
272012
282013
292013
302013

Humansdorp weather by month

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

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan25° / 18°407.8147.6
Feb25° / 18°437.113.37.5
Mar24° / 17°497.712.37.6
Apr22° / 15°437.511.27.3
May21° / 13°366.210.37.3
Jun19° / 11°356.59.87.0
Jul19° / 10°376.4107.0
Aug19° / 11°537.710.76.8
Sep19° / 12°387.111.86.8
Oct21° / 14°518.212.96.8
Nov22° / 15°588.513.86.9
Dec23° / 17°45814.27.4

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 41% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 22% of September, with mostly cloudy or overcast conditions the remaining 37%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
16832
26733
36733
46634
56535
66535
76436
86436
96436
106436
116337
126337
136337
146238
156238
166238
176238
186238
196238
206238
216337
226238
236238
246139
256238
266139
276139
286040
296040
306040

Chance of precipitation in September

Any precipitation

Humansdorp gets around 38 mm of rain over 7.1 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 24% and peaks near 25% on the wettest days.

0%10%20%30%40%151015202530
Rain chance (%)
122
222
322
422
522
623
723
823
923
1023
1124
1224
1324
1424
1524
1624
1724
1824
1924
2024
2124
2224
2325
2425
2525
2625
2725
2825
2925
3025

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 84% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)
19280
29280
39280
49190
59190
69190
790100
890100
988111
1087121
1186131
1285141
1385141
1483152
1582162
1682162
1781172
1881172
1980182
2080182
2180182
2280182
2379192
2479192
2579192
2678202
2778202
2877212
2977212
3076222

Wind in September

Winds average 15 km/h in September.

Across September, daily wind ranges from about 15 km/h on the calmest days to 15 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202530
Wind speed (km/h)Feels
115light breeze
215light breeze
315light breeze
415light breeze
515light breeze
615light breeze
715light breeze
815light breeze
915light breeze
1015light breeze
1115light breeze
1215light breeze
1315light breeze
1415light breeze
1515light breeze
1615light breeze
1715light breeze
1815light breeze
1915light breeze
2015light breeze
2115light breeze
2215light breeze
2315light breeze
2415light breeze
2515light breeze
2615light breeze
2715light breeze
2815light breeze
2915light breeze
3015light 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 6:43 AM to 6:01 AM, and sunset from 5:58 PM to 6:19 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.36:435:58
211.36:425:59
311.36:406:00
411.46:396:00
511.46:376:01
611.46:366:02
711.56:356:03
811.56:336:03
911.56:326:04
1011.66:306:05
1111.66:296:05
1211.66:276:06
1311.76:266:07
1411.76:246:08
1511.86:236:08
1611.86:226:09
1711.86:206:10
1811.96:196:10
1911.96:176:11
2011.96:166:12
2112.06:146:13
2212.06:136:13
2312.06:116:14
2412.16:106:15
2512.16:086:15
2612.26:076:16
2712.26:066:17
2812.26:046:18
2912.36:036:18
3012.36:016:19

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.74 kWh/m².

For context, solar energy here swings from a low near 2.64 kWh/m² to a high of 7.08 kWh/m² in December across the year — September's 4.74 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
14.2Bright
24.2Bright
34.3Bright
44.3Bright
54.3Bright
64.4Bright
74.4Bright
84.4Bright
94.5Bright
104.5Bright
114.6Bright
124.6Bright
134.6Bright
144.7Bright
154.7Bright
164.8Bright
174.8Bright
184.8Bright
194.9Bright
204.9Bright
214.9Bright
225.0Bright
235.0Bright
245.0Bright
255.0Bright
265.1Bright
275.1Bright
285.1Bright
295.2Bright
305.2Bright
Planning a trip in September

Is September a good time to visit Humansdorp?

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

6.8
Sightseeing
10th-best month of the year
3.1
Beach & pool
10th-best month of the year

September is a reasonable time to visit Humansdorp for sightseeing.

What to pack for Humansdorp in September

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

In September, Humansdorp sees daytime highs around 19°C and nights near 12°C. Worth packing: sun protection. About 7 days see rain.

sun protection

Sea temperature near Humansdorp in September

The nearest coast averages about 17°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 14 km away) is warmest in February at about 21°C and coldest in August near 17°C.

It's comfortable for a long swim from Dec 23 to Mar 23 — about 3 months when the water holds above 20°C.

16°18°20°22°JanFebMarAprMayJunJulAugSepOctNovDeccoolrefreshingcomfortable to swim
Sea temperature (°C)Comfort
Jan21Refreshing
Feb21Refreshing
Mar20Refreshing
Apr19Cool
May19Cool
Jun18Cool
Jul18Cool
Aug17Cool
Sep17Cool
Oct18Cool
Nov19Cool
Dec20Cool

UV index in Humansdorp 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 Humansdorp peaks around January 15 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 — in 10 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highModerateHighVery highExtremeJan 15UV 13Jun 23UV 3
UV index (midday)Level
Jan13Extreme
Feb11Extreme
Mar9Very high
Apr6High
May4Moderate
Jun3Moderate
Jul3Moderate
Aug4Moderate
Sep6High
Oct10Extreme
Nov11Extreme
Dec12Extreme

Air quality in Humansdorp 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 Humansdorp is worst in June — around 18 µg/m³ PM2.5 (moderate), about 2.5× the cleanest month (February, 7 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJun 1618 µg/m³Feb 97 µg/m³
PM2.5 (µg/m³)Level
Jan7Good
Feb7Good
Mar9Good
Apr10Good
May14Moderate
Jun18Moderate
Jul15Moderate
Aug16Moderate
Sep13Moderate
Oct11Good
Nov9Good
Dec7Good
Location & terrain

Where is Humansdorp?

Humansdorp sits at 34.0°S, 24.8°E, 137 m above sea level, in South Africa. The nearest listed city is Kruisfontein, 4.0 km away.

KnysnaSomerset EastGrahamstown

Topography around Humansdorp

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

Within 3 km, the terrain around Humansdorp has only modest variations in elevation — a maximum elevation change of 189 m around an average of 145 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 757 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,686 m.

The land around Humansdorp is covered by grassland (40%) and trees (27%) within 3 km, grassland (59%) within 16 km, and grassland (36%) and water (35%) within 80 km.

3 km
189 m
16 km
757 m
80 km
1,686 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Kruisfontein 4.0 km · Jeffreys Bay 14 km · Kariega 66 km · Port Elizabeth 78 km · Plettenberg Bay 129 km · Knysna 159 km · Somerset East 164 km · Grahamstown 182 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 Humansdorp (-34.029°, 24.7691°, elevation 137 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).