Orkney weather in September

In September, Orkney sees average daytime highs of 27°C and overnight lows near 10°C, with 15 mm of rain across 3 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 25°C in the first days to 28°C by the end. The sky is clear or mostly clear about 73% of the time in September, and the air most often feels dry.

Daylight stretches from about 11 h 24 min at the start of September to 12 h 12 min by month's end. Set against the rest of the year, September is Orkney's 5th-clearest and 3rd-windiest month. For the whole year in context, see Orkney's year-round climate.

Daytime high
27°
7th warmest
Overnight low
10°
5th coldest
Rainfall
15 mm
3 wet days
Daylight
11 h 48 min
6:12 AM – 6:03 PM
Cloud cover
24%
5th clearest
Wind
12 km/h
3rd windiest
Solar energy
6.14 kWh/m²
Travel score
8.3
out of 10

Orkney is town in North West province, South Africa.

Founded
1940

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 28°C by the end.

A typical September day in Orkney reaches about 27°C in the afternoon and slips back to 10°C overnight — a 16°C spread between the day's warmth and the night's chill. On most days the high lands between 21°C and 31°C. Set against its neighbours, September runs about 4°C warmer than August and about 2°C cooler than October.

10°20°30°151015202530
Avg high (°C)Avg low (°C)
1258
2258
3259
4259
5269
6269
7269
8269
92610
102610
112610
122710
132710
142710
152711
162711
172711
182711
192711
202711
212711
222711
232712
242712
252712
262812
272812
282812
292812
302812

How September really feels in Orkney

Once humidity and wind are folded in, September averages 0 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C
0
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

September sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Orkney 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
Jan29° / 18°9714.413.54.9
Feb29° / 17°7712.3135.4
Mar27° / 15°6810.812.26.5
Apr25° / 12°406.911.47.8
May23° / 193.110.78.6
Jun20° / 101.510.38.3
Jul20° / 50.910.58.5
Aug23° / 121.7119.0
Sep27° / 10°15311.88.3
Oct28° / 14°609.412.66.4
Nov29° / 15°7311.313.35.5
Dec30° / 17°9914.913.74.8

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 73% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 13% 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 (%)
1919
2919
3919
49010
59010
68911
78911
88812
98812
108812
118713
128614
138614
148515
158515
168515
178515
188515
198515
208515
218515
228416
238416
248416
258416
268416
278317
288317
298317
308218

Chance of precipitation in September

Any precipitation

Orkney gets around 15 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 19% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%151015202530
Rain chance (%)
18
28
38
48
58
68
78
88
98
108
118
128
139
149
159
169
1710
1810
1911
2011
2112
2212
2313
2414
2514
2615
2716
2817
2918
3019

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 100% 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
221000
231000
24991
25991
26991
27991
28991
29982
30982

Wind in September

Winds average 12 km/h in September.

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
1012light breeze
1112light breeze
1212light breeze
1312light breeze
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 24 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 48 minutes over September. Sunrise moves from 6:30 AM to 5:56 AM, and sunset from 5:56 PM to 6:09 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.46:305:56
211.56:295:57
311.56:285:57
411.56:265:58
511.56:255:58
611.66:245:58
711.66:235:59
811.66:225:59
911.76:216:00
1011.76:196:00
1111.76:186:01
1211.76:176:01
1311.86:166:02
1411.86:156:02
1511.86:146:02
1611.86:126:03
1711.96:116:03
1811.96:106:04
1911.96:096:04
2012.06:086:05
2112.06:066:05
2212.06:056:06
2312.06:046:06
2412.16:036:07
2512.16:026:07
2612.16:006:07
2712.15:596:08
2812.25:586:08
2912.25:576:09
3012.25:566:09

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 6.14 kWh/m².

For context, solar energy here swings from a low near 3.84 kWh/m² to a high of 7.23 kWh/m² in December across the year — September's 6.14 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.6Bright
25.7Bright
35.7Bright
45.8Bright
55.8Bright
65.8Bright
75.9Bright
85.9Bright
95.9Bright
106.0Bright
116.0Intense
126.0Intense
136.0Intense
146.1Intense
156.1Intense
166.1Intense
176.2Intense
186.2Intense
196.2Intense
206.3Intense
216.3Intense
226.3Intense
236.3Intense
246.4Intense
256.4Intense
266.4Intense
276.5Intense
286.5Intense
296.5Intense
306.5Intense
Planning a trip in September

Hazard calendar for Orkney

In seasonPeak

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

Orkney'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 Orkney?

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

8.3
Sightseeing
4th-best month of the year
8.1
Beach & pool
1st-best month of the year

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

What to pack for Orkney in September

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

In September, Orkney sees daytime highs around 27°C and nights near 10°C. Pack sun protection. Worth having: light clothes. About 3 days see rain.

sun protectionlight clothes

UV index in Orkney 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 Orkney peaks around January 13 at about 15 (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.

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highHighVery highExtremeJan 13UV 15Jun 20UV 5
UV index (midday)Level
Jan15Extreme
Feb13Extreme
Mar12Extreme
Apr9Very high
May6High
Jun5Moderate
Jul5High
Aug7Very high
Sep9Very high
Oct11Extreme
Nov12Extreme
Dec14Extreme

Air quality in Orkney 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 Orkney is worst in June — around 57 µg/m³ PM2.5 (unhealthy), about 4.6× the cleanest month (December, 12 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecModeratePoorUnhealthyPoorModerateJun 2257 µg/m³Dec 1913 µg/m³
PM2.5 (µg/m³)Level
Jan14Moderate
Feb19Moderate
Mar26Moderate
Apr34Moderate
May48Poor
Jun57Unhealthy
Jul56Unhealthy
Aug45Poor
Sep38Poor
Oct26Moderate
Nov15Moderate
Dec12Moderate
Location & terrain

Where is Orkney?

Orkney sits at 27.0°S, 26.7°E, 1,312 m above sea level, in South Africa. The nearest listed city is Klerksdorp, 14 km away.

Topography around Orkney

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

Within 3 km, the terrain around Orkney has only modest variations in elevation — a maximum elevation change of 51 m around an average of 1,299 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 133 m; within 80 km, significant variations in elevation — a maximum elevation change of 445 m.

The land around Orkney is covered by grassland (55%) within 3 km, grassland (57%) and cropland (27%) within 16 km, and grassland (58%) and cropland (36%) within 80 km.

3 km
51 m
16 km
133 m
80 km
445 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Klerksdorp 14 km · Stilfontein 18 km · Hartbeesfontein 35 km · Viljoenskroon 37 km · Bothaville 46 km · Potchefstroom 52 km · Leeudoringstad 52 km · Vredefort 69 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 Orkney (-26.9802°, 26.6727°, elevation 1,312 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).