Cwmbran weather in August

In August, Cwmbran sees average daytime highs of 20°C and overnight lows near 12°C, with 74 mm of rain across 11.4 wet days and about 14.4 hours of daylight. It is the 2nd-warmest and 6th-wettest month of the year here.

Highs ease over the month, from about 20°C in the first days to 19°C by the end. The sky is clear or mostly clear about 12% of the time in August, and the air most often feels dry.

Daylight stretches from about 15 h 18 min at the start of August to 13 h 30 min by month's end. Set against the rest of the year, August is Cwmbran's 3rd-clearest and 12th-windiest month. For the whole year in context, see Cwmbran's year-round climate.

Daytime high
20°
2nd warmest
Overnight low
12°
11th coldest
Rainfall
74 mm
11.4 wet days
Daylight
14 h 24 min
5:03 AM – 7:29 PM
Cloud cover
71%
3rd clearest
Wind
12 km/h
12th windiest
Solar energy
4.11 kWh/m²
Travel score
5.8
out of 10

Cwmbran is new town in south east Wales, United Kingdom.

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

Temperature in August

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 20°C in the first days to 19°C by the end.

A typical August day in Cwmbran reaches about 20°C in the afternoon and slips back to 12°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 17°C and 23°C. Set against its neighbours, August runs on par with July and about 3°C warmer than September.

10°15°20°25°151015202531
Avg high (°C)Avg low (°C)
12013
22013
32013
42013
52013
62013
72013
82013
92013
102013
112012
122012
132012
142012
152012
162012
172012
182012
191912
201912
211912
221912
231912
241912
251912
261912
271911
281911
291911
301911
311911

How August really feels in Cwmbran

Once humidity and wind are folded in, August 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

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

Cwmbran weather by month

How August compares with the rest of the year at a glance. August is the 2nd-warmest and 6th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / 7913.21.38.10.8
Feb / 6210.51.29.61.0
Mar10° / 6311.20.811.51.9
Apr12° / 6812.10.413.63.1
May15° / 7512.7015.34.2
Jun18° / 10°7011016.35.4
Jul20° / 12°6712015.95.9
Aug20° / 12°7411.4014.45.8
Sep17° / 10°639.9012.45.3
Oct14° / 9012.70.110.43.5
Nov10° / 8413.30.48.62.0
Dec / 8712.51.17.71.0

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

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

Beyond those clear spells, partly cloudy skies cover about 18% of August, with mostly cloudy or overcast conditions the remaining 70%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13367
23367
33367
43268
53268
63268
73268
83268
93169
103169
113169
123070
133070
143070
152971
162872
172872
182872
192872
202872
212872
222872
232971
242971
252971
262971
272971
282971
292971
302872
312971

Chance of precipitation in August

Any precipitation

Cwmbran gets around 74 mm of rain over 11.4 wet days in August. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 37% and peaks near 40% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%40%50%151015202531
Rain chance (%)
140
240
339
439
539
638
738
838
937
1037
1137
1237
1337
1437
1537
1638
1738
1839
1939
2039
2138
2238
2337
2436
2536
2635
2734
2833
2932
3031
3131

Humidity in August

DryComfortableHumidMuggyOppressiveMiserable

Most of August feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, August lands in the dry band about 60% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)
152417
253407
352408
453398
554388
654379
755369
855369
956359
1057349
1157349
1257349
1358339
1458339
1558339
1658339
1758339
1859338
1960328
2060328
2161327
2262317
2363316
2464306
2566295
2666295
2768284
2869274
2970273
3071263
3171263

Wind in August

Winds average 12 km/h in August, the calmest month.

Across August, daily wind ranges from about 12 km/h on the calmest days to 13 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
112light breeze
212light breeze
312light breeze
412light breeze
512light breeze
612light breeze
712light breeze
812light breeze
912light breeze
1012light breeze
1112light breeze
1212light breeze
1312light breeze
1412light breeze
1512light breeze
1613light breeze
1713light breeze
1813light breeze
1913light breeze
2013light breeze
2113light breeze
2213light breeze
2313light breeze
2413light breeze
2512light breeze
2612light breeze
2712light breeze
2812light breeze
2912light breeze
3012light breeze
3112light breeze

Sunrise & sunset in August

DaylightNight

Daylight runs from about 15 h 18 min at the start of August to 13 h 30 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 108 minutes over August. Sunrise moves from 4:40 AM to 5:28 AM, and sunset from 7:57 PM to 6:56 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
115.34:407:57
215.24:417:55
315.24:437:53
415.14:447:52
515.14:467:50
615.04:477:48
715.04:497:46
814.94:517:44
914.84:527:43
1014.84:547:41
1114.74:557:39
1214.74:577:37
1314.64:597:35
1414.55:007:33
1514.55:027:31
1614.45:037:29
1714.45:057:27
1814.35:077:25
1914.25:087:23
2014.25:107:21
2114.15:127:18
2214.05:137:16
2314.05:157:14
2413.95:177:12
2513.95:187:10
2613.85:207:07
2713.75:227:05
2813.75:237:03
2913.65:257:01
3013.55:276:58
3113.55:286:56

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 4.11 kWh/m².

For context, solar energy here swings from a low near 0.63 kWh/m² to a high of 5.18 kWh/m² in June across the year — August's 4.11 kWh/m² falls in the middle.

024151015202531
Solar energy (kWh/m²)Level
14.6Bright
24.5Bright
34.5Bright
44.5Bright
54.5Bright
64.4Bright
74.4Bright
84.4Bright
94.4Bright
104.3Bright
114.3Bright
124.3Bright
134.2Bright
144.2Bright
154.2Bright
164.1Bright
174.1Bright
184.1Bright
194.0Bright
204.0Moderate
214.0Moderate
223.9Moderate
233.9Moderate
243.8Moderate
253.8Moderate
263.8Moderate
273.7Moderate
283.7Moderate
293.7Moderate
303.6Moderate
313.6Moderate
Planning a trip in August

Is August a good time to visit Cwmbran?

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

5.8
Sightseeing
2nd-best month of the year
2.8
Beach & pool
2nd-best month of the year

August is a reasonable time to visit Cwmbran for sightseeing.

What to pack for Cwmbran in August

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

In August, Cwmbran sees daytime highs around 20°C and nights near 12°C. Worth packing: rain gear. About 11 days see rain.

rain gear

Sea temperature near Cwmbran in August

The nearest coast averages about 18°C in August — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 32 km away) is warmest in August at about 18°C and coldest in February near 7°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
Feb7Bracing
Mar8Bracing
Apr9Bracing
May12Bracing
Jun15Cool
Jul17Cool
Aug18Cool
Sep17Cool
Oct15Bracing
Nov12Bracing
Dec9Bracing

UV index in Cwmbran in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August peaks around 7 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Cwmbran 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 Cwmbran?

Cwmbran sits at 51.7°N, 3.0°W, 66 m above sea level, in United Kingdom. The nearest listed city is Pontypool, 5.0 km away.

Topography around Cwmbran

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

Within 3 km, the terrain around Cwmbran has significant variations in elevation — a maximum elevation change of 422 m around an average of 114 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 576 m; within 80 km, large variations in elevation — a maximum elevation change of 864 m.

The land around Cwmbran is covered by trees (40%), grassland (35%) and artificial surfaces (23%) within 3 km, grassland (48%) and trees (34%) within 16 km, and grassland (52%) within 80 km.

3 km
422 m
16 km
576 m
80 km
864 m
treesgrasslandcroplandartificial surfaceswater
August weather nearby: Pontypool 5.0 km · Risca 7.0 km · Newport 8.0 km · Blackwood 13 km · Gelligaer 16 km · Caerphilly 16 km · Ebbw Vale 19 km · Cardiff 22 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 Cwmbran (51.6545°, -3.0228°, elevation 66 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).