Risca weather in August

In August, Risca sees average daytime highs of 20°C and overnight lows near 14°C, with 75 mm of rain across 11.3 wet days and about 14.4 hours of daylight. It is the 2nd-warmest and 5th-wettest month of the year here.

Day-to-day highs hold fairly steady near 20°C through the month. The sky is clear or mostly clear about 14% 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 Risca's 3rd-clearest and 12th-windiest month. For the whole year in context, see Risca's year-round climate.

Daytime high
20°
2nd warmest
Overnight low
14°
11th coldest
Rainfall
75 mm
11.3 wet days
Daylight
14 h 24 min
5:04 AM – 7:29 PM
Cloud cover
69%
3rd clearest
Wind
14 km/h
12th windiest
Solar energy
4.06 kWh/m²
Travel score
5.9
out of 10

Risca is town in Caerphilly County Borough, Wales, UK.

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

Temperature in August

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 20°C through the month.

A typical August day in Risca reaches about 20°C in the afternoon and slips back to 14°C overnight — a 6°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 2°C warmer than September.

10°15°20°25°151015202531
Avg high (°C)Avg low (°C)
12114
22114
32114
42114
52014
62014
72014
82014
92014
102014
112014
122014
132014
142014
152014
162014
172014
182014
192014
202013
212013
222013
232013
241913
251913
261913
271913
281913
291913
301913
311913

How August really feels in Risca

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.

Risca weather by month

How August compares with the rest of the year at a glance. August is the 2nd-warmest and 5th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / 7713.40.78.11.1
Feb / 6010.50.89.61.2
Mar10° / 6010.90.511.52.1
Apr13° / 6411.20.213.63.3
May16° / 6811.8015.34.5
Jun18° / 12°6410.6016.35.6
Jul20° / 14°6311.2015.96.0
Aug20° / 14°7511.3014.45.9
Sep18° / 11°6310.1012.45.5
Oct14° / 8813.1010.43.8
Nov11° / 8413.70.18.62.2
Dec / 8613.10.57.71.3

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 14% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 19% of August, with mostly cloudy or overcast conditions the remaining 67%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13961
23763
33763
43763
53763
63664
73565
83565
93565
103565
113466
123466
133466
143367
153367
163169
173169
183169
193070
203070
213169
223169
233268
243268
253268
263169
273169
283268
293268
303169
313169

Chance of precipitation in August

Any precipitation

Risca gets around 75 mm of rain over 11.3 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 36% and peaks near 39% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%40%50%151015202531
Rain chance (%)
139
239
339
439
539
639
738
838
937
1037
1137
1237
1336
1436
1537
1637
1737
1837
1937
2037
2137
2236
2336
2435
2535
2634
2733
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 51% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
14248100
24247100
34346111
44345111
54443121
64542121
74641121
84740131
94739131
104838131
114838131
124937131
134937131
145037131
155037121
165037121
175037121
185137111
195138110
205238100
215337100
22543790
23543790
24563680
25563680
26583570
27583570
28593560
29603460
30603460
31623350

Wind in August

Winds average 14 km/h in August, the calmest month.

Across August, daily wind ranges from about 14 km/h on the calmest days to 14 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (km/h)Feels
114light breeze
214light breeze
314light breeze
414light breeze
514light breeze
614light breeze
714light 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
3014light breeze
3114light 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 5:29 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
215.24:427:55
315.24:437:53
415.14:457:52
515.14:467:50
615.04:487:48
714.94:497:46
814.94:517:45
914.84:537:43
1014.84:547:41
1114.74:567:39
1214.74:577:37
1314.64:597:35
1414.55:017:33
1514.55:027:31
1614.45:047:29
1714.45:067:27
1814.35:077:25
1914.25:097:23
2014.25:107:21
2114.15:127:19
2214.05:147:16
2314.05:157:14
2413.95:177:12
2513.95:197:10
2613.85:207:08
2713.75:227:05
2813.75:247:03
2913.65:257:01
3013.55:276:59
3113.55:296:56

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 4.06 kWh/m².

For context, solar energy here swings from a low near 0.64 kWh/m² to a high of 5.12 kWh/m² in June across the year — August's 4.06 kWh/m² falls in the middle.

024151015202531
Solar energy (kWh/m²)Level
14.5Bright
24.5Bright
34.5Bright
44.4Bright
54.4Bright
64.4Bright
74.4Bright
84.3Bright
94.3Bright
104.3Bright
114.2Bright
124.2Bright
134.2Bright
144.2Bright
154.1Bright
164.1Bright
174.0Bright
184.0Bright
194.0Moderate
203.9Moderate
213.9Moderate
223.9Moderate
233.8Moderate
243.8Moderate
253.8Moderate
263.7Moderate
273.7Moderate
283.7Moderate
293.6Moderate
303.6Moderate
313.6Moderate
Planning a trip in August

Is August a good time to visit Risca?

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

5.9
Sightseeing
2nd-best month of the year
3.1
Beach & pool
2nd-best month of the year

August is a reasonable time to visit Risca for sightseeing.

What to pack for Risca in August

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

In August, Risca sees daytime highs around 20°C and nights near 14°C. Worth packing: rain gear. About 11 days see rain.

rain gear

Sea temperature near Risca 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 26 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 Risca 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 Risca 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 Risca?

Risca sits at 51.6°N, 3.1°W, 49 m above sea level, in United Kingdom. The nearest listed city is Newport, 7.0 km away.

Topography around Risca

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

Within 3 km, the terrain around Risca has significant variations in elevation — a maximum elevation change of 385 m around an average of 154 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 550 m; within 80 km, large variations in elevation — a maximum elevation change of 864 m.

The land around Risca is covered by trees (51%) and grassland (38%) within 3 km, grassland (39%) and trees (35%) within 16 km, and grassland (52%) within 80 km.

3 km
385 m
16 km
550 m
80 km
864 m
treesgrasslandcroplandartificial surfaceswater
August weather nearby: Newport 7.0 km · Cwmbran 7.0 km · Caerphilly 9.0 km · Blackwood 10 km · Pontypool 11 km · Gelligaer 12 km · Cardiff 15 km · Pontypridd 17 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 Risca (51.608°, -3.1008°, elevation 49 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).