Cwmbran weather in December

In December, Cwmbran sees average daytime highs of 7°C and overnight lows near 3°C, with 87 mm of precipitation across 12.5 wet days and about 7.7 hours of daylight. It is the 10th-warmest and 2nd-wettest month of the year here.

Day-to-day highs hold fairly steady near 7°C through the month. The sky is clear or mostly clear about 15% of the time in December, and the air most often feels dry.

Daylight stretches from about 7 h 54 min at the start of December to 7 h 36 min by month's end. Set against the rest of the year, December is Cwmbran's 7th-clearest and 3rd-windiest month. For the whole year in context, see Cwmbran's year-round climate.

Daytime high
10th warmest
Overnight low
3rd coldest
Precipitation
87 mm
12.5 wet days
Daylight
7 h 36 min
8:20 AM – 3:56 PM
Cloud cover
74%
7th clearest
Wind
16 km/h
3rd windiest
Solar energy
0.63 kWh/m²
Travel score
1.0
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 December

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 7°C through the month.

A typical December day in Cwmbran reaches about 7°C in the afternoon and slips back to 3°C overnight — a 5°C spread between the day's warmth and the night's chill. On most days the high lands between 3°C and 11°C. Set against its neighbours, December runs about 3°C cooler than November and on par with January.

-5°10°15°151015202531
Avg high (°C)Avg low (°C)
183
283
383
483
583
683
783
883
983
1083
1183
1283
1373
1473
1573
1673
1773
1873
1973
2073
2172
2272
2372
2472
2572
2672
2772
2872
2972
3072
3172

How December really feels in Cwmbran

Once humidity and wind are folded in, December averages 0 days that feel above 32°C and 31 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
31
wind chill below the day's low

The story in December is cold — wind chill drags the overnight "feels like" below the raw low.

Cwmbran weather by month

How December compares with the rest of the year at a glance. December is the 10th-warmest and 2nd-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 December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 15% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 12% of December, with mostly cloudy or overcast conditions the remaining 74%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
12872
22971
33070
43070
53169
63169
73070
83070
92971
102872
112872
122773
132674
142575
152575
162377
172377
182377
192377
202377
212476
222476
232476
242575
252674
262674
272674
282773
292773
302872
312872

Chance of precipitation in December

Any precipitationSnow

Cwmbran gets around 87 mm of rain and snow over 12.5 wet days in December. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 41% and peaks near 44% on the wettest days, and about 1 day brings snow.

0%10%20%30%40%50%151015202531
Rain chance (%)Snow chance (%)
1391
2381
3382
4382
5382
6372
7372
8382
9382
10382
11393
12393
13403
14403
15403
16414
17414
18414
19424
20424
21424
22425
23435
24435
25435
26435
27435
28435
29445
30445
31445

Humidity in December

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, December 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%151015202531
Dry (%)
1100
2100
3100
4100
5100
6100
7100
8100
9100
10100
11100
12100
13100
14100
15100
16100
17100
18100
19100
20100
21100
22100
23100
24100
25100
26100
27100
28100
29100
30100
31100

Wind in December

Winds average 16 km/h in December.

Across December, daily wind ranges from about 15 km/h on the calmest days to 16 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202531
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
2216light breeze
2316light breeze
2416light breeze
2516light breeze
2616light breeze
2716light breeze
2816light breeze
2916light breeze
3016light breeze
3116light breeze

Sunrise & sunset in December

DaylightNight

Daylight runs from about 7 h 54 min at the start of December to 7 h 36 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 18 minutes over December. Sunrise moves from 8:04 AM to 8:26 AM, and sunset from 4:00 PM to 4:04 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
17.98:044:00
27.98:063:59
37.98:073:58
47.88:083:58
57.88:093:58
67.88:113:57
77.88:123:57
87.78:133:57
97.78:143:56
107.78:153:56
117.78:163:56
127.78:173:56
137.68:183:56
147.68:193:56
157.68:203:56
167.68:203:56
177.68:213:56
187.68:223:57
197.68:223:57
207.68:233:57
217.68:243:58
227.68:243:58
237.68:243:59
247.68:253:59
257.68:254:00
267.68:254:00
277.68:264:01
287.68:264:02
297.68:264:03
307.68:264:03
317.68:264:04

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 0.63 kWh/m² — the year's lowest.

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 — December's 0.63 kWh/m² sits near the bottom.

00.511.52151015202531
Solar energy (kWh/m²)Level
10.7Dim
20.7Dim
30.7Dim
40.7Dim
50.7Dim
60.7Dim
70.7Dim
80.7Dim
90.7Dim
100.7Dim
110.6Dim
120.6Dim
130.6Dim
140.6Dim
150.6Dim
160.6Dim
170.6Dim
180.6Dim
190.6Dim
200.6Dim
210.6Dim
220.6Dim
230.6Dim
240.6Dim
250.6Dim
260.6Dim
270.6Dim
280.6Dim
290.6Dim
300.6Dim
310.6Dim
Planning a trip in December

Is December a good time to visit Cwmbran?

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

1.0
Sightseeing
10th-best month of the year
0.0
Beach & pool
8th-best month of the year

December is a weaker month for outdoor sightseeing in Cwmbran.

What to pack for Cwmbran in December

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

In December, Cwmbran sees daytime highs around 7°C and nights near 3°C. Pack a warm layer. Worth having: a heavy coat and rain gear. About 13 days see rain.

a warm layera heavy coatrain gear

Sea temperature near Cwmbran in December

The nearest coast averages about 9°C in December — 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 December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 1. 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
December 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).