Penarth weather in January

In January, Penarth sees average daytime highs of 7°C and overnight lows near 4°C, with 95 mm of precipitation across 14.5 wet days and about 8.1 hours of daylight. It is the 12th-warmest and 4th-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 14% of the time in January, and the air most often feels dry.

Daylight stretches from about 7 h 42 min at the start of January to 8 h 48 min by month's end. Set against the rest of the year, January is Penarth's 11th-clearest and 1st-windiest month. For the whole year in context, see Penarth's year-round climate.

Daytime high
12th warmest
Overnight low
2nd coldest
Precipitation
95 mm
14.5 wet days
Daylight
8 h 06 min
8:19 AM – 4:25 PM
Cloud cover
74%
11th clearest
Wind
20 km/h
1st windiest
Solar energy
0.8 kWh/m²
Travel score
1.0
out of 10

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

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

Temperature in January

Average highAverage lowShaded bands: 10–90% of days

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

A typical January day in Penarth reaches about 7°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 3°C and 11°C. Set against its neighbours, January runs on par with December and on par with February.

-5°10°15°151015202531
Avg high (°C)Avg low (°C)
184
284
384
484
584
684
784
884
984
1084
1184
1284
1384
1484
1584
1684
1784
1884
1974
2073
2173
2273
2373
2473
2573
2673
2773
2873
2973
3073
3173

How January really feels in Penarth

Once humidity and wind are folded in, January 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 January is cold — wind chill drags the overnight "feels like" below the raw low.

Penarth weather by month

How January compares with the rest of the year at a glance. January is the 12th-warmest and 4th-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 January

ClearMostly clearPartly cloudyMostly cloudyOvercast

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

Beyond those clear spells, partly cloudy skies cover about 14% of January, with mostly cloudy or overcast conditions the remaining 72%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
12872
22872
32872
42872
52872
62971
72971
82971
93070
103070
113070
123070
133070
143070
152971
162971
173070
183070
192971
202971
212971
222971
232872
242872
252773
262773
272773
282575
292674
302674
312674

Chance of precipitation in January

Any precipitationSnow

Penarth gets around 95 mm of rain and snow over 14.5 wet days in January. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 46% and peaks near 50% on the wettest days, and about 1 day brings snow. The odds ease toward the end of the month.

0%20%40%60%151015202531
Rain chance (%)Snow chance (%)
1483
2483
3493
4493
5503
6503
7503
8503
9503
10503
11503
12503
13493
14493
15482
16482
17472
18462
19462
20453
21443
22443
23433
24433
25423
26424
27414
28414
29414
30414
31415

Humidity in January

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, January 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 January

Winds average 20 km/h in January, the windiest month of the year.

Across January, 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
120light breeze
220light breeze
320light breeze
420light breeze
520light breeze
620light breeze
720light breeze
820light breeze
920light breeze
1020light breeze
1120light breeze
1220light breeze
1320light breeze
1420light breeze
1520light breeze
1620light breeze
1719light breeze
1819light breeze
1919light breeze
2019light breeze
2119light breeze
2219light breeze
2319light breeze
2419light breeze
2519light breeze
2619light breeze
2719light breeze
2819light breeze
2919light breeze
3019light breeze
3119light breeze

Sunrise & sunset in January

DaylightNight

Daylight runs from about 7 h 42 min at the start of January to 8 h 48 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 66 minutes over January. Sunrise moves from 8:25 AM to 8:03 AM, and sunset from 4:07 PM to 4:49 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
17.78:254:07
27.78:254:07
37.78:254:08
47.78:254:10
57.88:254:11
67.88:244:12
77.88:244:13
87.88:244:14
97.98:234:15
107.98:234:17
117.98:224:18
128.08:224:19
138.08:214:21
148.08:214:22
158.18:204:23
168.18:194:25
178.18:184:26
188.28:174:28
198.28:174:29
208.38:164:31
218.38:154:32
228.38:144:34
238.48:134:36
248.48:124:37
258.58:104:39
268.58:094:41
278.68:084:42
288.68:074:44
298.78:064:46
308.78:044:47
318.88:034:49

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 0.8 kWh/m².

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 — January's 0.8 kWh/m² sits near the bottom.

00.511.52151015202531
Solar energy (kWh/m²)Level
10.6Dim
20.7Dim
30.7Dim
40.7Dim
50.7Dim
60.7Dim
70.7Dim
80.7Dim
90.7Dim
100.7Dim
110.7Dim
120.7Dim
130.8Dim
140.8Dim
150.8Dim
160.8Dim
170.8Dim
180.8Dim
190.8Dim
200.9Dim
210.9Dim
220.9Dim
230.9Dim
240.9Dim
250.9Dim
261.0Dim
271.0Dim
281.0Dim
291.0Dim
301.1Dim
311.1Dim
Planning a trip in January

Is January a good time to visit Penarth?

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

1.0
Sightseeing
12th-best month of the year
0.0
Beach & pool
7th-best month of the year

January is a weaker month for outdoor sightseeing in Penarth.

What to pack for Penarth in January

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

In January, Penarth sees daytime highs around 7°C and nights near 4°C. Pack a warm layer and rain gear. Worth having: a heavy coat. About 15 days see rain.

a warm layerrain geara heavy coat

Sea temperature near Penarth in January

The nearest coast averages about 8°C in January — 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
Jun15Cool
Jul17Cool
Aug18Cool
Sep17Cool
Oct15Bracing
Nov12Bracing
Dec9Bracing

UV index in Penarth in January

LowModerateHighVery highExtreme

Clear-sky midday UV in January peaks around 1. The full-year curve, shaded by WHO exposure level, is below.

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

Penarth sits at 51.4°N, 3.2°W, 51 m above sea level, in United Kingdom. The nearest listed city is Cardiff, 5.0 km away.

Topography around Penarth

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

Within 3 km, the terrain around Penarth has only modest variations in elevation — a maximum elevation change of 95 m around an average of 16 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 Penarth is covered by water (43%) and artificial surfaces (24%) within 3 km, water (53%) within 16 km, and grassland (52%) within 80 km.

3 km
95 m
16 km
303 m
80 km
864 m
treesgrasslandcroplandartificial surfaceswater
January weather nearby: Cardiff 5.0 km · Barry 9.0 km · Caerphilly 15 km · Weston-super-Mare 17 km · Risca 19 km · Newport 21 km · Pontypridd 22 km · Clevedon 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 Penarth (51.4386°, -3.1734°, elevation 51 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).