Aberdare weather in September

In September, Aberdare sees average daytime highs of 16°C and overnight lows near 10°C, with 83 mm of rain across 11.7 wet days and about 12.4 hours of daylight. It is the 4th-warmest and 10th-wettest month of the year here.

Highs ease over the month, from about 17°C in the first days to 15°C by the end. The sky is clear or mostly clear about 12% of the time in September, and the air most often feels dry.

Daylight stretches from about 13 h 24 min at the start of September to 11 h 24 min by month's end. Set against the rest of the year, September is Aberdare's 6th-clearest and 9th-windiest month. For the whole year in context, see Aberdare's year-round climate.

Daytime high
16°
4th warmest
Overnight low
10°
9th coldest
Rainfall
83 mm
11.7 wet days
Daylight
12 h 24 min
5:56 AM – 6:20 PM
Cloud cover
73%
6th clearest
Wind
14 km/h
9th windiest
Solar energy
3.07 kWh/m²
Travel score
4.7
out of 10

Aberdare is town in Rhondda Cynon Taf, Wales.

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

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 17°C in the first days to 15°C by the end.

A typical September day in Aberdare reaches about 16°C in the afternoon and slips back to 10°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 13°C and 19°C. Set against its neighbours, September runs about 2°C cooler than August and about 3°C warmer than October.

10°15°20°25°151015202530
Avg high (°C)Avg low (°C)
11711
21711
31711
41710
51710
61710
71710
81710
91710
101710
111710
121710
131710
141610
151610
161610
171610
181610
191610
20169
21169
22169
23169
24159
25159
26159
27159
28159
29159
30159

How September really feels in Aberdare

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.

Aberdare weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 10th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / 11215.31.78.10.6
Feb / 87121.89.60.7
Mar / 8013.31.311.51.5
Apr11° / 8113.20.513.62.6
May14° / 9014.2015.43.7
Jun17° / 10°8712.9016.34.8
Jul19° / 12°8914.30165.3
Aug18° / 12°9513.5014.45.3
Sep16° / 10°8311.7012.44.7
Oct13° / 12014.30.110.43.1
Nov / 11415.20.68.61.7
Dec / 12114.21.57.70.8

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 12% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 16% of September, with mostly cloudy or overcast conditions the remaining 73%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
12971
22971
32971
42971
52971
62971
72971
82971
92971
102971
112971
122971
132872
142872
152872
162872
172872
182872
192773
202773
212773
222674
232575
242575
252575
262476
272575
282476
292476
302377

Chance of precipitation in September

Any precipitation

Aberdare gets around 83 mm of rain over 11.7 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 39% and peaks near 45% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
136
235
335
435
536
636
737
837
938
1038
1138
1238
1338
1439
1539
1639
1739
1839
1939
2039
2139
2240
2340
2441
2542
2643
2743
2844
2944
3045

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 82% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)
175241
276231
376231
477221
577221
678211
778211
879201
979201
1080191
1180191
1281181
1381181
1482171
1582171
1683161
1783161
1885150
1985150
2085150
2185150
2285150
2386140
2486140
2586140
2687130
2787130
2888120
2988120
3089110

Wind in September

Winds average 14 km/h in September.

Across September, daily wind ranges from about 13 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
113light breeze
213light breeze
313light breeze
413light breeze
513light breeze
613light breeze
713light breeze
814light breeze
914light breeze
1014light breeze
1114light breeze
1214light breeze
1314light breeze
1414light breeze
1514light breeze
1614light breeze
1714light breeze
1814light breeze
1914light breeze
2014light breeze
2114light breeze
2214light breeze
2314light breeze
2414light breeze
2514light breeze
2614light breeze
2714light breeze
2814light breeze
2914light breeze
3015light breeze

Sunrise & sunset in September

DaylightNight

Daylight runs from about 13 h 24 min at the start of September to 11 h 24 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 120 minutes over September. Sunrise moves from 5:31 AM to 6:20 AM, and sunset from 6:56 PM to 5:46 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.45:316:56
213.35:336:53
313.35:356:51
413.25:366:49
513.15:386:46
613.15:406:44
713.05:416:41
812.95:436:39
912.95:456:37
1012.85:466:34
1112.75:486:32
1212.75:506:30
1312.65:516:27
1412.55:536:25
1512.55:556:22
1612.45:566:20
1712.35:586:17
1812.36:006:15
1912.26:016:13
2012.16:036:10
2112.16:056:08
2212.06:066:05
2311.96:086:03
2411.86:106:01
2511.86:115:58
2611.76:135:56
2711.66:155:53
2811.66:175:51
2911.56:185:49
3011.46:205:46

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 3.07 kWh/m².

For context, solar energy here swings from a low near 0.64 kWh/m² to a high of 5.39 kWh/m² in June across the year — September's 3.07 kWh/m² falls in the middle.

01234151015202530
Solar energy (kWh/m²)Level
13.7Moderate
23.7Moderate
33.6Moderate
43.6Moderate
53.5Moderate
63.5Moderate
73.5Moderate
83.4Moderate
93.4Moderate
103.3Moderate
113.3Moderate
123.3Moderate
133.2Moderate
143.2Moderate
153.1Moderate
163.1Moderate
173.0Moderate
183.0Moderate
192.9Moderate
202.9Moderate
212.8Moderate
222.8Moderate
232.7Moderate
242.7Moderate
252.6Moderate
262.6Moderate
272.5Moderate
282.5Moderate
292.4Moderate
302.4Moderate
Planning a trip in September

Is September a good time to visit Aberdare?

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

4.7
Sightseeing
4th-best month of the year
0.8
Beach & pool
4th-best month of the year

September is a reasonable time to visit Aberdare for sightseeing.

What to pack for Aberdare in September

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

In September, Aberdare sees daytime highs around 16°C and nights near 10°C. Worth packing: a warm layer and rain gear. About 12 days see rain.

a warm layerrain gear

Sea temperature near Aberdare 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 31 km away) is warmest in August at about 18°C and coldest in February near 8°C.

The water stays below 20°C all year — cool enough that most swimmers want a wetsuit.

5°10°15°20°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshing
Sea temperature (°C)Comfort
Jan8Bracing
Feb8Bracing
Mar8Bracing
Apr9Bracing
May11Bracing
Jun14Bracing
Jul16Cool
Aug18Cool
Sep17Cool
Oct15Cool
Nov12Bracing
Dec10Bracing

UV index in Aberdare in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 4 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Aberdare peaks around August 13 at about 6 (high) — sunscreen and a hat are worth it in the middle of the day. It bottoms out near January 1 at about 1 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 6 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighModerateLowAug 13UV 6Jan 1UV 1
UV index (midday)Level
Jan1Low
Feb1Low
Mar3Moderate
Apr4Moderate
May6High
Jun6High
Jul6High
Aug7High
Sep4Moderate
Oct2Moderate
Nov1Low
Dec1Low
Location & terrain

Where is Aberdare?

Aberdare sits at 51.7°N, 3.4°W, 135 m above sea level, in United Kingdom. The nearest listed city is Rhondda, 6.0 km away.

Topography around Aberdare

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

Within 3 km, the terrain around Aberdare has significant variations in elevation — a maximum elevation change of 331 m around an average of 236 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 685 m; within 80 km, large variations in elevation — a maximum elevation change of 864 m.

The land around Aberdare is covered by trees (52%) and grassland (34%) within 3 km, grassland (54%) and trees (39%) within 16 km, and grassland (52%) and water (20%) within 80 km.

3 km
331 m
16 km
685 m
80 km
864 m
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Rhondda 6.0 km · Merthyr Tydfil 6.0 km · Tonypandy 10 km · Gelligaer 14 km · Pontypridd 15 km · Blackwood 17 km · Ebbw Vale 18 km · Maesteg 19 km

United Kingdom travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type D / G / M
230 V · 50 Hz
Prices
≈ 89% of US
price level, 2025
GDP per capita
$57,602
2025
Happiness
6.7 / 10
World Happiness, 2025
Safe drinking water
100%
of population, 2024
Homicide rate
1.1
per 100k, 2021
Road deaths
3.2
per 100k/yr, 2019
Income group
High
World Bank
Religion
Christian 60%none 26%Muslim 4%other 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 Aberdare (51.7144°, -3.4492°, elevation 135 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. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).