Ermua weather in December

In December, Ermua sees average daytime highs of 12°C and overnight lows near 7°C, with 124 mm of precipitation across 14.5 wet days and about 8.9 hours of daylight. It is the 10th-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 18% 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 Ermua's 11th-clearest and 1st-windiest month. For the whole year in context, see Ermua's year-round climate.

Daytime high
12°
10th warmest
Overnight low
3rd coldest
Precipitation
124 mm
14.5 wet days
Daylight
8 h 48 min
8:42 AM – 5:31 PM
Cloud cover
69%
11th clearest
Wind
15 km/h
1st windiest
Solar energy
1.39 kWh/m²
Travel score
2.7
out of 10

Ermua is capital of Ermua Municipality, Spain.

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 12°C through the month.

A typical December day in Ermua reaches about 12°C in the afternoon and slips back to 7°C overnight — a 4°C spread between the day's warmth and the night's chill. On most days the high lands between 8°C and 15°C. Set against its neighbours, December runs about 2°C cooler than November and on par with January.

10°15°20°151015202531
Avg high (°C)Avg low (°C)
1128
2128
3128
4128
5128
6128
7128
8128
9128
10127
11127
12127
13127
14127
15127
16127
17127
18127
19127
20127
21127
22127
23127
24127
25117
26117
27117
28117
29117
30117
31117

Ermua 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
Jan11° / 12415.30.89.22.4
Feb11° / 11013.71.410.22.6
Mar13° / 10513.30.511.63.5
Apr15° / 10915.30.113.13.8
May17° / 12°9314.3014.45.0
Jun20° / 14°7311.7015.16.0
Jul22° / 16°6610.8014.96.6
Aug23° / 17°6511.1013.86.8
Sep21° / 15°7511.6012.36.2
Oct18° / 13°11013.6010.85.4
Nov14° / 15715.80.19.53.5
Dec12° / 12414.50.58.92.7

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 18% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 14% of December, with mostly cloudy or overcast conditions the remaining 68%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13070
23070
33070
43070
53169
63268
73169
83169
93268
103268
113268
123169
133268
143268
153367
163367
173367
183268
193169
203169
213169
223169
233268
243169
253268
263268
273268
283268
293268
303268
313367

Chance of precipitation in December

Any precipitationSnow

Ermua gets around 124 mm of rain and snow over 14.5 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 46% and peaks near 54% 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 (%)
1541
2531
3531
4521
5511
6501
7491
8491
9481
10472
11472
12462
13452
14452
15442
16442
17442
18442
19442
20442
21442
22442
23442
24442
25442
26441
27441
28441
29441
30452
31452

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 15 km/h in December, the windiest month of the year.

Across December, daily wind ranges from about 14 km/h on the calmest days to 15 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (km/h)Feels
114light breeze
214light breeze
314light breeze
414light 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
2215light breeze
2315light breeze
2415light breeze
2515light breeze
2615light breeze
2715light breeze
2815light breeze
2915light breeze
3015light breeze
3115light breeze

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 8:29 AM to 8:48 AM, and sunset from 5:31 PM to 5:38 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
19.08:295:31
29.08:305:31
39.08:315:30
49.08:325:30
59.08:335:30
68.98:345:30
78.98:345:30
88.98:355:30
98.98:365:30
108.98:375:30
118.98:385:30
128.98:395:30
138.88:395:30
148.88:405:30
158.88:415:30
168.88:425:31
178.88:425:31
188.88:435:31
198.88:435:32
208.88:445:32
218.88:455:32
228.88:455:33
238.88:455:33
248.88:465:34
258.88:465:34
268.88:475:35
278.88:475:36
288.88:475:36
298.88:475:37
308.88:485:38
318.88:485:38

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 5.86 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
31.4Dim
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 Ermua?

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

2.7
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 Ermua.

What to pack for Ermua in December

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

In December, Ermua sees daytime highs around 12°C and nights near 7°C. Pack a warm layer and rain gear. About 15 days see rain.

a warm layerrain gear

Sea temperature near Ermua 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 23 km away) is warmest in August at about 22°C and coldest in February near 12°C.

It's comfortable for a long swim from Jul 3 to Sep 25 — about 2.8 months when the water holds above 20°C.

10°15°20°25°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmcomfortable to swim
Sea temperature (°C)Comfort
Jan13Bracing
Feb12Bracing
Mar13Bracing
Apr14Bracing
May16Cool
Jun19Cool
Jul21Refreshing
Aug22Refreshing
Sep21Refreshing
Oct18Cool
Nov16Cool
Dec14Bracing

UV index in Ermua 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 Ermua peaks around July 15 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 20 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 20UV 1
UV index (midday)Level
Jan2Low
Feb2Low
Mar5Moderate
Apr6High
May6High
Jun8Very high
Jul9Very high
Aug8Very high
Sep5High
Oct4Moderate
Nov2Low
Dec1Low
Location & terrain

Where is Ermua?

Ermua sits at 43.2°N, 2.5°W, 181 m above sea level, in Spain. The nearest listed city is Eibar, 3.0 km away.

Topography around Ermua

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

Within 3 km, the terrain around Ermua has large variations in elevation — a maximum elevation change of 661 m around an average of 352 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,295 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,497 m.

The land around Ermua is covered by trees (73%) within 3 km, trees (76%) and grassland (21%) within 16 km, and trees (44%) and water (27%) within 80 km.

3 km
661 m
16 km
1,295 m
80 km
1,497 m
treesshrubsgrasslandcroplandartificial surfaceswater
December weather nearby: Eibar 3.0 km · Durango 11 km · Arrasate / Mondragón 14 km · Amorebieta 19 km · Gernika-Lumo 21 km · Galdakao 28 km · Zarautz 29 km · Bermeo 31 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 Ermua (43.1872°, -2.5026°, elevation 181 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).