Bermeo weather in December

In December, Bermeo sees average daytime highs of 13°C and overnight lows near 11°C, with 141 mm of rain across 15.7 wet days and about 8.8 hours of daylight. It is the 9th-warmest and 2nd-wettest month of the year here.

Day-to-day highs hold fairly steady near 13°C through the month. The sky is clear or mostly clear about 17% of the time in December, and the air most often feels dry.

Daylight stretches from about 9 hours at the start of December to 8 h 48 min by month's end. Set against the rest of the year, December is Bermeo's 12th-clearest and 1st-windiest month. For the whole year in context, see Bermeo's year-round climate.

Daytime high
13°
9th warmest
Overnight low
11°
4th coldest
Rainfall
141 mm
15.7 wet days
Daylight
8 h 48 min
8:43 AM – 5:31 PM
Cloud cover
70%
12th clearest
Wind
23 km/h
1st windiest
Solar energy
1.39 kWh/m²
Travel score
3.1
out of 10

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 13°C through the month.

A typical December day in Bermeo reaches about 13°C in the afternoon and slips back to 11°C overnight — a 3°C spread between the day's warmth and the night's chill. On most days the high lands between 10°C and 16°C. Set against its neighbours, December runs about 2°C cooler than November and about 1°C warmer than January.

10°15°20°151015202531
Avg high (°C)Avg low (°C)
11411
21411
31411
41411
51311
61311
71311
81311
91311
101311
111311
121311
131311
141311
151311
161310
171310
181310
191310
201310
211310
221310
231310
241310
251310
261310
271310
281310
291310
301310
311310

Bermeo weather by month

How December compares with the rest of the year at a glance. December is the 9th-warmest and 2nd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan12° / 10°14115.89.12.8
Feb12° / 12414.410.22.6
Mar13° / 10°11013.411.63.2
Apr14° / 11°9513.913.23.6
May16° / 14°7012.314.54.7
Jun18° / 17°5710.215.26.0
Jul20° / 19°519.514.96.7
Aug21° / 20°5510.113.86.8
Sep20° / 18°7411.412.36.2
Oct18° / 16°1131410.85.4
Nov15° / 13°18016.99.53.8
Dec13° / 11°14115.78.83.1

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

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

Beyond those clear spells, partly cloudy skies cover about 15% of December, with mostly cloudy or overcast conditions the remaining 68%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13268
23268
33169
43169
53268
63268
73268
83169
93169
103268
113367
123367
133367
143367
153268
163169
173268
183268
193268
203268
213169
223169
233268
243268
253268
263268
273367
283367
293367
303367
313367

Chance of precipitation in December

Any precipitation

Bermeo gets around 141 mm of rain over 15.7 wet days in December. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 50% and peaks near 58% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%151015202531
Rain chance (%)
158
257
357
456
556
655
754
854
953
1052
1151
1250
1349
1449
1548
1647
1747
1847
1947
2047
2147
2247
2347
2447
2547
2647
2748
2848
2948
3048
3148

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 (%)Comfortable (%)
1991
2991
3991
4991
5991
6991
7991
8991
91000
101000
111000
121000
131000
141000
151000
161000
171000
181000
191000
201000
211000
221000
231000
241000
251000
261000
271000
281000
291000
301000
311000

Wind in December

Winds average 23 km/h in December, the windiest month of the year.

Across December, daily wind ranges from about 23 km/h on the calmest days to 23 km/h at its breeziest. It stays fairly steady from day to day.

0510152025151015202531
Wind speed (km/h)Feels
123breezy
223breezy
323breezy
423breezy
523breezy
623breezy
723breezy
823breezy
923breezy
1023breezy
1123breezy
1223breezy
1323breezy
1423breezy
1523breezy
1623breezy
1723breezy
1823breezy
1923breezy
2023breezy
2123breezy
2223breezy
2323breezy
2423breezy
2523breezy
2623breezy
2723breezy
2823breezy
2923breezy
3023breezy
3123breezy

Sunrise & sunset in December

DaylightNight

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

Days shrink by about 12 minutes over December. Sunrise moves from 8:30 AM to 8:50 AM, and sunset from 5:31 PM to 5:39 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
19.08:305:31
29.08:315:31
39.08:325:31
49.08:335:30
58.98:345:30
68.98:355:30
78.98:365:30
88.98:375:30
98.98:385:30
108.98:395:30
118.88:405:30
128.88:405:30
138.88:415:30
148.88:425:30
158.88:435:31
168.88:435:31
178.88:445:31
188.88:455:31
198.88:455:32
208.88:465:32
218.88:465:33
228.88:475:33
238.88:475:33
248.88:485:34
258.88:485:35
268.88:485:35
278.88:495:36
288.88:495:36
298.88:495:37
308.88:495:38
318.88:505:39

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 1.39 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 1.39 kWh/m² to a high of 6.15 kWh/m² in June across the year — December's 1.39 kWh/m² sits near the bottom.

00.511.52151015202531
Solar energy (kWh/m²)Level
11.5Dim
21.5Dim
31.5Dim
41.4Dim
51.4Dim
61.4Dim
71.4Dim
81.4Dim
91.4Dim
101.4Dim
111.4Dim
121.4Dim
131.4Dim
141.4Dim
151.4Dim
161.4Dim
171.4Dim
181.4Dim
191.4Dim
201.4Dim
211.4Dim
221.4Dim
231.4Dim
241.4Dim
251.4Dim
261.4Dim
271.4Dim
281.4Dim
291.4Dim
301.4Dim
311.4Dim
Planning a trip in December

Is December a good time to visit Bermeo?

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

3.1
Sightseeing
10th-best month of the year
0.0
Beach & pool
9th-best month of the year

December is a weaker month for outdoor sightseeing in Bermeo.

What to pack for Bermeo in December

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

In December, Bermeo sees daytime highs around 13°C and nights near 11°C. Pack rain gear. Worth having: a warm layer and a windbreaker. About 16 days see rain.

rain geara warm layera windbreaker

Sea temperature near Bermeo in December

The nearest coast averages about 14°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 24 km away) is warmest in August at about 22°C and coldest in February near 13°C.

It's comfortable for a long swim from Jul 7 to Sep 24 — about 2.6 months when the water holds above 20°C.

10°15°20°25°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmcomfortable to swim
Sea temperature (°C)Comfort
Jan13Bracing
Feb13Bracing
Mar13Bracing
Apr13Bracing
May15Cool
Jun18Cool
Jul21Refreshing
Aug22Refreshing
Sep21Refreshing
Oct18Cool
Nov16Cool
Dec14Bracing

UV index in Bermeo 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 Bermeo peaks around July 17 at about 8 (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 17UV 8Dec 22UV 1
UV index (midday)Level
Jan1Low
Feb2Low
Mar5Moderate
Apr6High
May6High
Jun8Very high
Jul8Very high
Aug8Very high
Sep5High
Oct4Moderate
Nov2Low
Dec1Low
Location & terrain

Where is Bermeo?

Bermeo sits at 43.4°N, 2.7°W, 29 m above sea level, in Spain. The nearest listed city is Gernika-Lumo, 12 km away.

Topography around Bermeo

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

Within 3 km, the terrain around Bermeo has significant variations in elevation — a maximum elevation change of 394 m around an average of 70 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 675 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,596 m.

The land around Bermeo is covered by water (47%) and trees (38%) within 3 km, water (52%) and trees (37%) within 16 km, and trees (41%) and water (37%) within 80 km.

3 km
394 m
16 km
675 m
80 km
1,596 m
treesgrasslandcroplandartificial surfaceswater
December weather nearby: Gernika-Lumo 12 km · Mungia 12 km · Amorebieta 23 km · Galdakao 23 km · Leioa 24 km · Bilbao 24 km · Basauri 24 km · Erandio 24 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 Bermeo (43.4209°, -2.7215°, elevation 29 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).