Alcobaça weather in December

In December, Alcobaça sees average daytime highs of 28°C and overnight lows near 24°C, with 111 mm of rain across 12.8 wet days and about 13 hours of daylight. It is the 4th-warmest and 3rd-wettest month of the year here.

Day-to-day highs hold fairly steady near 28°C through the month. The sky is clear or mostly clear about 29% of the time in December, and the air most often feels oppressive.

Daylight stretches from about 13 hours at the start of December to 13 hours by month's end. Set against the rest of the year, December is Alcobaça's 11th-clearest and 3rd-windiest month. For the whole year in context, see Alcobaça's year-round climate.

Daytime high
28°
4th warmest
Overnight low
24°
9th coldest
Rainfall
111 mm
12.8 wet days
Daylight
13 hours
5:02 AM – 6:04 PM
Cloud cover
64%
11th clearest
Wind
17 km/h
3rd windiest
Solar energy
6.01 kWh/m²
Travel score
5.7
out of 10

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 28°C through the month.

A typical December day in Alcobaça reaches about 28°C in the afternoon and slips back to 24°C overnight — a 4°C spread between the day's warmth and the night's chill. On most days the high lands between 26°C and 29°C. Set against its neighbours, December runs about 1°C warmer than November and on par with January.

20°23°25°28°30°151015202531
Avg high (°C)Avg low (°C)
12724
22724
32724
42724
52824
62824
72824
82824
92824
102824
112824
122824
132824
142824
152824
162824
172824
182824
192824
202824
212824
222824
232824
242824
252824
262824
272824
282824
292824
302824
312824

How December really feels in Alcobaça

Once humidity and wind are folded in, December averages 0 days that feel above 32°C and 0 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
0
wind chill below the day's low

December sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Alcobaça weather by month

How December compares with the rest of the year at a glance. December is the 4th-warmest and 3rd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan28° / 24°7211.712.95.6
Feb29° / 24°5611.312.65.3
Mar29° / 24°11916.912.14.9
Apr28° / 24°9216.711.65.3
May27° / 23°801411.26.1
Jun26° / 21°5712.6116.5
Jul25° / 21°5313.911.16.6
Aug25° / 21°4210.311.47.0
Sep26° / 22°4810.111.96.9
Oct26° / 23°9912.812.46.3
Nov27° / 23°1581512.85.6
Dec28° / 24°11112.8135.7

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 29% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 13% of December, with mostly cloudy or overcast conditions the remaining 57%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13565
23664
33565
43565
53763
63763
73763
83763
93862
103961
114060
124060
134159
144258
154258
164357
174456
184456
194654
204654
214654
224654
234753
244753
254852
264852
274951
284852
294951
304852
314852

Chance of precipitation in December

Any precipitation

Alcobaça gets around 111 mm of rain over 12.8 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 41% and peaks near 52% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%151015202531
Rain chance (%)
152
252
351
450
549
648
746
845
944
1043
1142
1241
1341
1440
1540
1639
1739
1839
1939
2038
2138
2238
2337
2437
2536
2636
2736
2835
2935
3035
3135

Humidity in December

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, December lands in the oppressive band about 92% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1111862
2111862
3110872
419873
519873
618883
708893
808893
907903
1007903
1106922
1206922
1305932
1405932
1505932
1604942
1704942
1804942
1904951
2004951
2104942
2204942
2304942
2403952
2503952
2603952
2704942
2804942
2904942
3004942
3104942

Wind in December

Winds average 17 km/h in December.

Across December, daily wind ranges from about 16 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
3116light breeze

Sunrise & sunset in December

DaylightNight

Daylight runs from about 13 hours at the start of December to 13 hours by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 0 minutes over December. Sunrise moves from 4:57 AM to 5:09 AM, and sunset from 5:56 PM to 6:11 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.04:575:56
213.04:585:56
313.04:585:57
413.04:585:57
513.04:585:58
613.04:585:59
713.04:595:59
813.04:596:00
913.04:596:00
1013.05:006:01
1113.05:006:02
1213.05:006:02
1313.05:016:03
1413.05:016:03
1513.05:016:04
1613.05:026:04
1713.05:026:05
1813.05:026:05
1913.05:036:06
2013.05:036:06
2113.05:046:07
2213.05:046:07
2313.05:056:08
2413.05:056:08
2513.05:066:09
2613.05:066:09
2713.05:076:09
2813.05:076:10
2913.05:086:10
3013.05:086:11
3113.05:096:11

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 6.01 kWh/m².

For context, solar energy here swings from a low near 3.63 kWh/m² to a high of 6.42 kWh/m² in January across the year — December's 6.01 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.5Bright
25.5Bright
35.6Bright
45.6Bright
55.7Bright
65.7Bright
75.7Bright
85.8Bright
95.8Bright
105.8Bright
115.9Bright
125.9Bright
136.0Bright
146.0Intense
156.0Intense
166.1Intense
176.1Intense
186.1Intense
196.2Intense
206.2Intense
216.2Intense
226.2Intense
236.2Intense
246.3Intense
256.3Intense
266.3Intense
276.3Intense
286.3Intense
296.3Intense
306.4Intense
316.4Intense
Planning a trip in December

Is December a good time to visit Alcobaça?

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

5.7
Sightseeing
7th-best month of the year
6.3
Beach & pool
5th-best month of the year

December is a reasonable time to visit Alcobaça for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Alcobaça in December

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

In December, Alcobaça sees daytime highs around 28°C and nights near 24°C. Pack light clothes and sun protection. Worth having: rain gear. About 13 days see rain.

light clothessun protectionrain gear

Sea temperature near Alcobaça in December

The nearest coast averages about 26°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 14 km away) is warmest in April at about 27°C and coldest in August near 24°C.

The water stays above 20°C all year — warm enough for a swim any month.

22°24°26°28°JanFebMarAprMayJunJulAugSepOctNovDecrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan26Warm
Feb27Warm
Mar27Warm
Apr27Warm
May26Warm
Jun25Warm
Jul25Warm
Aug24Warm
Sep25Warm
Oct25Warm
Nov26Warm
Dec26Warm

UV index in Alcobaça in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 13 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Alcobaça peaks around February 14 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 21 at about 7 (very high).

The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highExtremeFeb 14UV 14Jun 21UV 7
UV index (midday)Level
Jan14Extreme
Feb15Extreme
Mar13Extreme
Apr10Extreme
May8Very high
Jun7High
Jul7Very high
Aug9Very high
Sep10Extreme
Oct12Extreme
Nov13Extreme
Dec13Extreme
Location & terrain

Where is Alcobaça?

Alcobaça sits at 17.5°S, 39.2°W, 5 m above sea level, in Brazil. The nearest listed city is Prado, 20 km away.

Topography around Alcobaça

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

Within 3 km, the terrain around Alcobaça has only modest variations in elevation — a maximum elevation change of 21 m around an average of 4 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 72 m; within 80 km, significant variations in elevation — a maximum elevation change of 592 m.

The land around Alcobaça is covered by water (43%) within 3 km, water (48%), trees (25%) and grassland (21%) within 16 km, and water (46%), trees (29%) and grassland (23%) within 80 km.

3 km
21 m
16 km
72 m
80 km
592 m
treesshrubsgrasslandartificial surfacesbare terrainwaterwetlandmangroves
December weather nearby: Prado 20 km · Nova Viçosa 45 km · Teixeira de Freitas 58 km · Itamaraju 64 km · Mucuri 73 km · Posto da Mata 81 km · Medeiros Neto 110 km · Itabela 112 km

Brazil travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type C / N
127 / 220 V · 60 Hz
Prices
≈ 46% of US
price level, 2025
GDP per capita
$10,713
2025
Happiness
6.6 / 10
World Happiness, 2025
Safe drinking water
89%
of population, 2024
Homicide rate
19.3
per 100k, 2023
Road deaths
16
per 100k/yr, 2019
Income group
Upper middle
World Bank
English
Low
EF EPI 482
Religion
Roman Catholic 57%Evangelical 27%none 9%other 4%

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 Alcobaça (-17.5194°, -39.1956°, elevation 5 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).