Boiro weather in December

In December, Boiro sees average daytime highs of 13°C and overnight lows near 9°C, with 187 mm of rain across 15 wet days and about 8.9 hours of daylight. It is the 10th-warmest and 4th-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 24% of the time in December, and the air most often feels dry.

Daylight stretches from about 9 h 06 min at the start of December to 8 h 54 min by month's end. Set against the rest of the year, December is Boiro's 11th-clearest and 4th-windiest month. For the whole year in context, see Boiro's year-round climate.

Daytime high
13°
10th warmest
Overnight low
3rd coldest
Rainfall
187 mm
15 wet days
Daylight
8 h 54 min
9:05 AM – 5:58 PM
Cloud cover
66%
11th clearest
Wind
15 km/h
4th windiest
Solar energy
1.42 kWh/m²
Travel score
3.3
out of 10

Boiro is human settlement in Boiro, A Coruña Province, Galicia, 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 13°C through the month.

A typical December day in Boiro reaches about 13°C in the afternoon and slips back to 9°C overnight — a 5°C spread between the day's warmth and the night's chill. On most days the high lands between 11°C and 16°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)
1149
2149
3149
4149
5149
6149
7149
8149
9149
10139
11139
12139
13139
14139
15139
16139
17139
18138
19138
20138
21138
22138
23138
24138
25138
26138
27138
28138
29138
30138
31138

Boiro weather by month

How December compares with the rest of the year at a glance. December is the 10th-warmest and 4th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan13° / 19114.79.23.0
Feb13° / 12311.610.33.5
Mar15° / 13211.811.64.4
Apr16° / 10°12713.413.14.7
May18° / 12°11311.814.45.7
Jun21° / 14°60815.16.9
Jul23° / 16°365.414.87.9
Aug23° / 16°506.713.77.7
Sep22° / 15°828.612.36.9
Oct19° / 13°1921410.85.4
Nov15° / 10°19215.39.64.0
Dec13° / 187158.93.3

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 24% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 11% of December, with mostly cloudy or overcast conditions the remaining 64%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13664
23565
33466
43466
53466
63466
73466
83565
93565
103565
113565
123565
133664
143664
153565
163664
173664
183763
193763
203862
213862
223763
233664
243664
253664
263664
273466
283466
293466
303466
313466

Chance of precipitation in December

Any precipitation

Boiro gets around 187 mm of rain over 15 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 48% and peaks near 52% on the wettest days.

0%20%40%60%151015202531
Rain chance (%)
149
248
348
448
548
648
748
848
948
1048
1147
1247
1347
1447
1547
1647
1746
1846
1946
2047
2147
2248
2348
2449
2549
2650
2750
2851
2951
3052
3152

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 94% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)
1946
2946
3937
4937
5937
6937
7937
8937
9937
10937
11937
12937
13937
14937
15937
16937
17937
18946
19946
20946
21946
22946
23946
24946
25946
26946
27946
28946
29946
30955
31955

Wind in December

Winds average 15 km/h in December.

Across December, daily wind ranges from about 15 km/h on the calmest days to 16 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (km/h)Feels
115light breeze
215light breeze
315light breeze
415light 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
1816light breeze
1916light breeze
2016light breeze
2116light breeze
2216light breeze
2316light breeze
2416light breeze
2516light breeze
2616light breeze
2716light breeze
2816light breeze
2916light breeze
3016light breeze
3116light breeze

Sunrise & sunset in December

DaylightNight

Daylight runs from about 9 h 06 min at the start of December to 8 h 54 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 8:52 AM to 9:12 AM, and sunset from 5:58 PM to 6:06 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
19.18:525:58
29.18:535:58
39.18:545:58
49.08:555:58
59.08:565:57
69.08:575:57
79.08:585:57
89.08:595:57
99.09:005:57
108.99:015:57
118.99:025:57
128.99:025:57
138.99:035:58
148.99:045:58
158.99:055:58
168.99:055:58
178.99:065:58
188.99:075:59
198.99:075:59
208.99:085:59
218.99:086:00
228.99:096:00
238.99:096:01
248.99:106:01
258.99:106:02
268.99:106:03
278.99:116:03
288.99:116:04
298.99:116:04
308.99:116:05
318.99:126:06

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 1.42 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 1.42 kWh/m² to a high of 6.65 kWh/m² in June across the year — December's 1.42 kWh/m² sits near the bottom.

00.511.522.5151015202531
Solar energy (kWh/m²)Level
11.5Dim
21.5Dim
31.5Dim
41.5Dim
51.5Dim
61.5Dim
71.5Dim
81.5Dim
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

Hazard calendar for Boiro

In seasonPeak

In December, Boiro sits inside its rainy season season. The full year is below, with each hazard's peak months called out.

Boiro's rainy season runs October–May, when most of the year's rain falls.

Rainy season
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is December a good time to visit Boiro?

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

3.3
Sightseeing
11th-best month of the year
0.0
Beach & pool
11th-best month of the year

December is a weaker month for outdoor sightseeing in Boiro.

What to pack for Boiro in December

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

In December, Boiro sees daytime highs around 13°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 Boiro 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 20 km away) is warmest in August at about 17°C and coldest in February near 13°C.

The water stays below 20°C all year — cool enough that most swimmers want a wetsuit.

12°14°16°18°JanFebMarAprMayJunJulAugSepOctNovDecbracingcool
Sea temperature (°C)Comfort
Jan14Bracing
Feb13Bracing
Mar13Bracing
Apr14Bracing
May15Cool
Jun16Cool
Jul17Cool
Aug17Cool
Sep17Cool
Oct16Cool
Nov16Cool
Dec14Bracing

UV index in Boiro 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 Boiro peaks around July 15 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 15UV 8Dec 22UV 1
UV index (midday)Level
Jan2Low
Feb2Moderate
Mar5Moderate
Apr6High
May6High
Jun8Very high
Jul8Very high
Aug8Very high
Sep6High
Oct4Moderate
Nov2Low
Dec1Low
Location & terrain

Where is Boiro?

Boiro sits at 42.6°N, 8.9°W, 29 m above sea level, in Spain. The nearest listed city is Vilagarcía de Arousa, 11 km away.

Topography around Boiro

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

Within 3 km, the terrain around Boiro has significant variations in elevation — a maximum elevation change of 255 m around an average of 57 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 685 m; within 80 km, large variations in elevation — a maximum elevation change of 1,141 m.

The land around Boiro is covered by trees (46%), water (22%) and grassland (21%) within 3 km, trees (42%) and water (32%) within 16 km, and trees (44%) and water (33%) within 80 km.

3 km
255 m
16 km
685 m
80 km
1,141 m
treesshrubsgrasslandcroplandartificial surfaceswater
December weather nearby: Vilagarcía de Arousa 11 km · Santa Uxía de Ribeira 14 km · Poio 28 km · Sanxenxo 28 km · Pontevedra 31 km · Teo 32 km · Marín 32 km · A Estrada 33 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 Boiro (42.6472°, -8.8846°, 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).