Castro-Urdiales weather in January

In January, Castro-Urdiales sees average daytime highs of 12°C and overnight lows near 9°C, with 119 mm of precipitation across 15 wet days and about 9.2 hours of daylight. It is the 11th-warmest and 2nd-wettest month of the year here.

Day-to-day highs hold fairly steady near 12°C through the month. The sky is clear or mostly clear about 17% of the time in January, and the air most often feels dry.

Daylight stretches from about 8 h 48 min at the start of January to 9 h 36 min by month's end. Set against the rest of the year, January is Castro-Urdiales's 12th-clearest and 3rd-windiest month. For the whole year in context, see Castro-Urdiales's year-round climate.

Daytime high
12°
11th warmest
Overnight low
2nd coldest
Precipitation
119 mm
15 wet days
Daylight
9 h 06 min
8:49 AM – 5:56 PM
Cloud cover
70%
12th clearest
Wind
17 km/h
3rd windiest
Solar energy
1.58 kWh/m²
Travel score
2.9
out of 10

Castro-Urdiales is capital of Castro-Urdiales Municipality, Spain.

Air quality
Good
PM10 15.1 µg/m³ · 2019

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 12°C through the month.

A typical January day in Castro-Urdiales reaches about 12°C in the afternoon and slips back to 9°C overnight — a 4°C spread between the day's warmth and the night's chill. On most days the high lands between 9°C and 16°C. Set against its neighbours, January runs about 1°C cooler than December and on par with February.

10°15°20°151015202531
Avg high (°C)Avg low (°C)
1139
2139
3139
4139
5139
6139
7139
8139
9139
10139
11139
12139
13129
14129
15129
16129
17129
18129
19129
20129
21129
22129
23129
24128
25128
26128
27128
28128
29128
30128
31128

Castro-Urdiales weather by month

How January compares with the rest of the year at a glance. January is the 11th-warmest and 2nd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan12° / 119159.22.9
Feb12° / 10313.510.22.9
Mar14° / 10°9813.211.63.7
Apr15° / 11°8913.813.24.0
May17° / 13°6912.714.55.1
Jun20° / 16°569.915.26.2
Jul22° / 18°469.114.96.9
Aug23° / 19°499.413.87.0
Sep21° / 17°6610.912.36.4
Oct19° / 15°10313.810.85.5
Nov15° / 12°15216.19.53.9
Dec13° / 10°11714.98.83.3

Cloud cover in January

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 17% of the time in January, the cloudiest month of the year.

Beyond those clear spells, partly cloudy skies cover about 15% of January, with mostly cloudy or overcast conditions the remaining 69%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13367
23367
33268
43268
53367
63367
73367
83367
93367
103367
113268
123367
133367
143268
153268
163268
173169
183169
193070
203070
213070
223070
233070
243070
252971
262971
272971
283070
293169
303169
313268

Chance of precipitation in January

Any precipitation

Castro-Urdiales gets around 119 mm of rain and snow over 15 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 48% and peaks near 50% on the wettest days, and about 0 day brings snow.

0%20%40%60%151015202531
Rain chance (%)
146
247
347
447
547
647
747
847
947
1047
1147
1248
1348
1448
1548
1649
1749
1849
1949
2050
2150
2250
2350
2450
2550
2650
2750
2850
2949
3049
3149

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 17 km/h in January.

Across January, daily wind ranges from about 17 km/h on the calmest days to 17 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (km/h)Feels
117light breeze
217light breeze
317light breeze
417light breeze
517light breeze
617light breeze
717light breeze
817light breeze
917light breeze
1017light breeze
1117light breeze
1217light breeze
1317light breeze
1417light breeze
1517light breeze
1617light breeze
1717light breeze
1817light breeze
1917light breeze
2017light breeze
2117light breeze
2217light breeze
2317light breeze
2417light breeze
2517light breeze
2617light breeze
2717light breeze
2817light breeze
2917light breeze
3017light breeze
3117light breeze

Sunrise & sunset in January

DaylightNight

Daylight runs from about 8 h 48 min at the start of January to 9 h 36 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 48 minutes over January. Sunrise moves from 8:51 AM to 8:38 AM, and sunset from 5:41 PM to 6:14 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
18.88:515:41
28.88:515:42
38.98:515:43
48.98:515:43
58.98:515:44
68.98:515:45
78.98:515:46
88.98:515:47
99.08:515:48
109.08:515:49
119.08:505:50
129.08:505:51
139.08:505:52
149.18:495:53
159.18:495:55
169.18:495:56
179.18:485:57
189.28:485:58
199.28:475:59
209.28:476:00
219.38:466:02
229.38:456:03
239.38:456:04
249.48:446:05
259.48:436:07
269.48:436:08
279.58:426:09
289.58:416:10
299.58:406:12
309.68:396:13
319.68:386:14

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 1.58 kWh/m².

For context, solar energy here swings from a low near 1.4 kWh/m² to a high of 6.12 kWh/m² in June across the year — January's 1.58 kWh/m² sits near the bottom.

00.511.522.5151015202531
Solar energy (kWh/m²)Level
11.4Dim
21.4Dim
31.4Dim
41.5Dim
51.5Dim
61.5Dim
71.5Dim
81.5Dim
91.5Dim
101.5Dim
111.5Dim
121.5Dim
131.5Dim
141.6Dim
151.6Dim
161.6Dim
171.6Dim
181.6Dim
191.6Dim
201.6Dim
211.6Dim
221.7Dim
231.7Dim
241.7Dim
251.7Dim
261.8Dim
271.8Dim
281.8Dim
291.9Dim
301.9Dim
311.9Dim
Planning a trip in January

Is January a good time to visit Castro-Urdiales?

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

2.9
Sightseeing
11th-best month of the year
0.0
Beach & pool
9th-best month of the year

January is a weaker month for outdoor sightseeing in Castro-Urdiales.

What to pack for Castro-Urdiales in January

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

In January, Castro-Urdiales sees daytime highs around 12°C and nights near 9°C. Pack rain gear. Worth having: a warm layer. About 15 days see rain.

rain geara warm layer

Sea temperature near Castro-Urdiales in January

The nearest coast averages about 13°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 22°C and coldest in February near 13°C.

It's comfortable for a long swim from Jul 11 to Sep 21 — about 2.4 months when the water holds above 20°C.

10°15°20°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingcomfortable to swim
Sea temperature (°C)Comfort
Jan13Bracing
Feb13Bracing
Mar13Bracing
Apr13Bracing
May15Cool
Jun18Cool
Jul21Refreshing
Aug22Refreshing
Sep20Refreshing
Oct18Cool
Nov16Cool
Dec14Bracing

UV index in Castro-Urdiales in January

LowModerateHighVery highExtreme

Clear-sky midday UV in January peaks around 2. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Castro-Urdiales peaks around July 15 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 at about 1 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highHighModerateLowJul 15UV 9Dec 22UV 1
UV index (midday)Level
Jan2Low
Feb2Low
Mar5Moderate
Apr6High
May6High
Jun8Very high
Jul9Very high
Aug8Very high
Sep5High
Oct4Moderate
Nov2Low
Dec1Low
Location & terrain

Where is Castro-Urdiales?

Castro-Urdiales sits at 43.4°N, 3.2°W, 18 m above sea level, in Spain. The nearest listed city is Santurtzi, 16 km away.

Topography around Castro-Urdiales

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

Within 3 km, the terrain around Castro-Urdiales has significant variations in elevation — a maximum elevation change of 455 m around an average of 60 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 851 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,676 m.

The land around Castro-Urdiales is covered by water (46%) and trees (30%) within 3 km, water (50%) and trees (35%) within 16 km, and trees (37%), water (35%) and grassland (20%) within 80 km.

3 km
455 m
16 km
851 m
80 km
1,676 m
treesgrasslandcroplandartificial surfaceswater
January weather nearby: Santurtzi 16 km · Getxo 17 km · Algorta 17 km · Portugalete 18 km · Sestao 19 km · Leioa 20 km · Barakaldo 21 km · Erandio 22 km

Spain travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type C / F
230 V · 50 Hz
Prices
≈ 65% of US
price level, 2025
GDP per capita
$38,627
2025
Happiness
6.5 / 10
World Happiness, 2025
Safe drinking water
99%
of population, 2024
Homicide rate
0.7
per 100k, 2023
Road deaths
3.9
per 100k/yr, 2019
Income group
High
World Bank
English
Moderate
EF EPI 540
Religion
Roman Catholic 58%atheist 16%agnostic 11%non-believer 11%

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 Castro-Urdiales (43.3828°, -3.2204°, elevation 18 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).