Barry weather in December

In December, Barry sees average daytime highs of 8°C and overnight lows near 4°C, with 107 mm of precipitation across 13.7 wet days and about 7.7 hours of daylight. It is the 10th-warmest and 1st-wettest month of the year here.

Day-to-day highs hold fairly steady near 8°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 8 hours at the start of December to 7 h 42 min by month's end. Set against the rest of the year, December is Barry's 8th-clearest and 2nd-windiest month. For the whole year in context, see Barry's year-round climate.

Daytime high
10th warmest
Overnight low
3rd coldest
Precipitation
107 mm
13.7 wet days
Daylight
7 h 36 min
8:20 AM – 3:59 PM
Cloud cover
73%
8th clearest
Wind
19 km/h
2nd windiest
Solar energy
0.65 kWh/m²
Travel score
1.2
out of 10

Barry is town and community in the Vale of Glamorgan, Wales.

Founded
1884

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 8°C through the month.

A typical December day in Barry reaches about 8°C in the afternoon and slips back to 4°C overnight — a 4°C spread between the day's warmth and the night's chill. On most days the high lands between 4°C and 12°C. Set against its neighbours, December runs about 2°C cooler than November and on par with January.

-5°10°15°151015202531
Avg high (°C)Avg low (°C)
195
295
395
495
595
695
784
884
984
1084
1184
1284
1384
1484
1584
1684
1784
1884
1984
2084
2184
2284
2384
2484
2584
2684
2784
2884
2984
3084
3184

How December really feels in Barry

Once humidity and wind are folded in, December averages 0 days that feel above 32°C and 17 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
17
wind chill below the day's low

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

Barry weather by month

How December compares with the rest of the year at a glance. December is the 10th-warmest and 1st-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / 9514.50.98.11.0
Feb / 7411.20.99.61.1
Mar / 6811.70.511.51.9
Apr12° / 7011.60.113.53.0
May15° / 7312.3015.34.2
Jun17° / 12°7111016.35.3
Jul19° / 13°7411.7015.95.8
Aug19° / 13°8712.3014.45.7
Sep17° / 11°7411012.45.2
Oct14° / 10614010.43.5
Nov10° / 10214.50.18.62.1
Dec / 10713.70.67.71.2

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 73%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13070
23070
33070
43070
53070
63070
73070
83070
93070
102872
112872
122872
132773
142773
152674
162674
172575
182476
192476
202476
212575
222575
232575
242575
252575
262575
272674
282674
292773
302773
312773

Chance of precipitation in December

Any precipitationSnow

Barry gets around 107 mm of rain and snow over 13.7 wet days in December, the wettest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 44% and peaks near 47% on the wettest days, and about 1 day brings snow.

0%20%40%60%151015202531
Rain chance (%)Snow chance (%)
1451
2441
3441
4441
5441
6431
7431
8431
9431
10431
11431
12431
13432
14432
15432
16442
17442
18442
19442
20442
21442
22452
23452
24452
25452
26452
27462
28462
29462
30472
31473

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 19 km/h in December.

Across December, daily wind ranges from about 19 km/h on the calmest days to 20 km/h at its breeziest. It stays fairly steady from day to day.

0510152025151015202531
Wind speed (km/h)Feels
119light breeze
219light breeze
319light breeze
419light breeze
519light breeze
619light breeze
719light breeze
819light breeze
919light breeze
1019light breeze
1119light breeze
1219light breeze
1319light breeze
1419light breeze
1519light breeze
1619light breeze
1719light breeze
1819light breeze
1919light breeze
2019light breeze
2119light breeze
2219light breeze
2319light breeze
2419light breeze
2519light breeze
2619light breeze
2719light breeze
2820light breeze
2920light breeze
3020light breeze
3120light breeze

Sunrise & sunset in December

DaylightNight

Daylight runs from about 8 hours at the start of December to 7 h 42 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 4:02 PM to 4:07 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
18.08:044:02
27.98:054:01
37.98:074:01
47.98:084:00
57.88:094:00
67.88:103:59
77.88:113:59
87.88:133:59
97.88:143:59
107.78:153:59
117.78:163:58
127.78:173:58
137.78:183:58
147.78:183:58
157.78:193:58
167.68:203:59
177.68:213:59
187.68:213:59
197.68:223:59
207.68:234:00
217.68:234:00
227.68:244:01
237.68:244:01
247.68:254:02
257.68:254:02
267.68:254:03
277.68:254:03
287.68:264:04
297.78:264:05
307.78:264:06
317.78:264:07

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 0.65 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 0.65 kWh/m² to a high of 5.28 kWh/m² in June across the year — December's 0.65 kWh/m² sits near the bottom.

00.511.52151015202531
Solar energy (kWh/m²)Level
10.8Dim
20.7Dim
30.7Dim
40.7Dim
50.7Dim
60.7Dim
70.7Dim
80.7Dim
90.7Dim
100.7Dim
110.7Dim
120.7Dim
130.7Dim
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 Barry?

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

1.2
Sightseeing
10th-best month of the year
0.0
Beach & pool
7th-best month of the year

December is a weaker month for outdoor sightseeing in Barry.

What to pack for Barry in December

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

In December, Barry sees daytime highs around 8°C and nights near 4°C. Pack a warm layer. Worth having: a heavy coat and rain gear. About 14 days see rain.

a warm layera heavy coatrain gear

Sea temperature near Barry 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 offshore 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
Jun15Bracing
Jul17Cool
Aug18Cool
Sep17Cool
Oct15Bracing
Nov12Bracing
Dec9Bracing

UV index in Barry 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 Barry peaks around August 14 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 14UV 6Jan 1UV 1
UV index (midday)Level
Jan1Low
Feb1Low
Mar3Moderate
Apr4Moderate
May6High
Jun6High
Jul6High
Aug7High
Sep4Moderate
Oct2Moderate
Nov1Low
Dec1Low
Location & terrain

Where is Barry?

Barry sits at 51.4°N, 3.3°W, 25 m above sea level, in United Kingdom. The nearest listed city is Penarth, 9.0 km away.

Topography around Barry

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

Within 3 km, the terrain around Barry has only modest variations in elevation — a maximum elevation change of 99 m around an average of 29 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 303 m; within 80 km, large variations in elevation — a maximum elevation change of 864 m.

The land around Barry is covered by water (33%), artificial surfaces (24%) and trees (20%) within 3 km, water (55%) and grassland (20%) within 16 km, and grassland (51%) within 80 km.

3 km
99 m
16 km
303 m
80 km
864 m
treesgrasslandcroplandartificial surfacesbare terrainwater
December weather nearby: Penarth 9.0 km · Cardiff 11 km · Caerphilly 20 km · Weston-super-Mare 22 km · Pontypridd 23 km · Coity 23 km · Bridgend 23 km · Risca 26 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 Barry (51.3998°, -3.2838°, elevation 25 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).