Porto Belo weather in December

In December, Porto Belo sees average daytime highs of 27°C and overnight lows near 21°C, with 126 mm of rain across 15.1 wet days and about 13.7 hours of daylight. It is the 4th-warmest and 5th-wettest month of the year here.

Highs climb over the month, from about 26°C in the first days to 28°C by the end. The sky is clear or mostly clear about 16% of the time in December, and the air most often feels muggy.

Daylight stretches from about 13 h 36 min at the start of December to 13 h 42 min by month's end. Set against the rest of the year, December is Porto Belo's 9th-clearest and 3rd-windiest month. For the whole year in context, see Porto Belo's year-round climate.

Daytime high
27°
4th warmest
Overnight low
21°
9th coldest
Rainfall
126 mm
15.1 wet days
Daylight
13 h 42 min
6:19 AM – 8:01 PM
Cloud cover
70%
9th clearest
Wind
13 km/h
3rd windiest
Solar energy
5.88 kWh/m²
Travel score
5.6
out of 10

Porto Belo is human settlement in Santa Catarina, Brazil.

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 26°C in the first days to 28°C by the end.

A typical December day in Porto Belo reaches about 27°C in the afternoon and slips back to 21°C overnight — a 5°C spread between the day's warmth and the night's chill. On most days the high lands between 24°C and 30°C. Set against its neighbours, December runs about 2°C warmer than November and about 1°C cooler than January.

15°20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
12620
22621
32621
42621
52621
62621
72621
82621
92621
102621
112621
122721
132721
142721
152721
162721
172722
182722
192722
202722
212722
222722
232722
242722
252722
262722
272722
282822
292822
302822
312822

Porto Belo weather by month

How December compares with the rest of the year at a glance. December is the 4th-warmest and 5th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan28° / 23°18619.313.54.9
Feb28° / 23°16417.8134.8
Mar27° / 22°12717.612.25.4
Apr25° / 20°8710.911.46.6
May23° / 17°10710.510.76.7
Jun21° / 15°949.310.36.5
Jul20° / 14°869.110.56.4
Aug21° / 15°879116.5
Sep21° / 16°13112.311.86.0
Oct23° / 18°11913.312.76.0
Nov25° / 20°1131413.36.1
Dec27° / 21°12615.113.75.6

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 16% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 18% of December, with mostly cloudy or overcast conditions the remaining 66%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13763
23862
33862
43763
53664
63664
73565
83565
93466
103367
113367
123268
133268
143268
153367
163268
173268
183367
193367
203268
213367
223367
233367
243466
253466
263466
273367
283466
293466
303466
313466

Chance of precipitation in December

Any precipitation

Porto Belo gets around 126 mm of rain over 15.1 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 55% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%151015202531
Rain chance (%)
148
248
348
447
547
647
747
847
947
1047
1147
1248
1348
1448
1549
1649
1750
1850
1950
2051
2151
2251
2351
2452
2552
2653
2753
2854
2954
3055
3155

Humidity in December

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, December lands in the muggy band about 37% of days. Sticky, muggy-or-worse air turns up on roughly 73% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
11142541190
21132541200
31122541200
41122541210
51112541220
61112540230
71102540240
81102539260
9192539270
10182439280
11182339290
12082239300
13072139320
14072039330
15071938341
16071938361
17061837371
18061737382
19061736392
20061635402
21051635413
22051534424
23051534424
24041433435
25041433445
26041432446
27041332456
28031331457
29031331467
30031330467
31031330478

Wind in December

Winds average 13 km/h in December.

Across December, daily wind ranges from about 12 km/h on the calmest days to 13 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (km/h)Feels
113light breeze
213light breeze
313light breeze
413light breeze
513light breeze
613light breeze
713light breeze
813light breeze
913light breeze
1013light breeze
1113light breeze
1213light breeze
1313light breeze
1413light breeze
1513light breeze
1613light breeze
1713light breeze
1813light breeze
1913light breeze
2013light breeze
2113light breeze
2213light breeze
2312light breeze
2412light breeze
2512light breeze
2612light breeze
2712light breeze
2812light breeze
2912light breeze
3012light breeze
3112light breeze

Sunrise & sunset in December

DaylightNight

Daylight runs from about 13 h 36 min at the start of December to 13 h 42 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 6 minutes over December. Sunrise moves from 6:16 AM to 6:27 AM, and sunset from 7:52 PM to 8:08 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.66:167:52
213.66:167:52
313.66:167:53
413.66:167:54
513.66:177:54
613.66:177:55
713.66:177:56
813.76:177:57
913.76:177:57
1013.76:177:58
1113.76:187:58
1213.76:187:59
1313.76:188:00
1413.76:198:00
1513.76:198:01
1613.76:198:01
1713.76:208:02
1813.76:208:03
1913.76:208:03
2013.76:218:04
2113.76:218:04
2213.76:228:05
2313.76:228:05
2413.76:238:05
2513.76:238:06
2613.76:248:06
2713.76:248:07
2813.76:258:07
2913.76:258:07
3013.76:268:08
3113.76:278:08

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 5.88 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 2.62 kWh/m² to a high of 5.88 kWh/m² in December across the year — December's 5.88 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.8Bright
25.8Bright
35.8Bright
45.8Bright
55.8Bright
65.8Bright
75.8Bright
85.8Bright
95.8Bright
105.8Bright
115.8Bright
125.8Bright
135.8Bright
145.8Bright
155.8Bright
165.9Bright
175.9Bright
185.9Bright
195.9Bright
205.9Bright
215.9Bright
225.9Bright
235.9Bright
245.9Bright
255.9Bright
265.9Bright
275.9Bright
285.9Bright
295.9Bright
305.8Bright
315.8Bright
Planning a trip in December

Is December a good time to visit Porto Belo?

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

5.6
Sightseeing
9th-best month of the year
5.6
Beach & pool
2nd-best month of the year

December is a reasonable time to visit Porto Belo for sightseeing.

What to pack for Porto Belo in December

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

In December, Porto Belo sees daytime highs around 27°C and nights near 21°C. Pack rain gear. Worth having: light clothes and sun protection. About 15 days see rain.

rain gearlight clothessun protection

Sea temperature near Porto Belo in December

The nearest coast averages about 25°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 18 km away) is warmest in February at about 26°C and coldest in August near 18°C.

It's comfortable for a long swim from Oct 4 to Jun 11 — about 8.3 months when the water holds above 20°C.

15°20°25°JanFebMarAprMayJunJulAugSepOctNovDeccoolrefreshingwarmtropicalcomfortable to swimcomfortable to swim
Sea temperature (°C)Comfort
Jan26Warm
Feb26Warm
Mar26Warm
Apr24Warm
May22Refreshing
Jun20Cool
Jul18Cool
Aug18Cool
Sep19Cool
Oct21Refreshing
Nov23Refreshing
Dec25Warm

UV index in Porto Belo 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 Porto Belo peaks around January 19 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 11 at about 5 (moderate).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highHighModerateHighVery highExtremeJan 19UV 14Jul 11UV 5
UV index (midday)Level
Jan14Extreme
Feb13Extreme
Mar11Extreme
Apr8Very high
May5High
Jun5Moderate
Jul5Moderate
Aug6High
Sep8Very high
Oct9Very high
Nov12Extreme
Dec13Extreme
Location & terrain

Where is Porto Belo?

Porto Belo sits at 27.2°S, 48.6°W, 3 m above sea level, in Brazil. The nearest listed city is Bombinhas, 6.0 km away.

Topography around Porto Belo

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

Within 3 km, the terrain around Porto Belo has significant variations in elevation — a maximum elevation change of 330 m around an average of 56 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 665 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,273 m.

The land around Porto Belo is covered by trees (48%) and water (33%) within 3 km, water (60%) and trees (25%) within 16 km, and trees (48%) and water (39%) within 80 km.

3 km
330 m
16 km
665 m
80 km
1,273 m
treesgrasslandcroplandartificial surfacesbare terrainwaterwetland
December weather nearby: Bombinhas 6.0 km · Itapema 9.0 km · Tijucas 12 km · Governador Celso Ramos 17 km · Camboriú 18 km · Balneário Camboriú 20 km · Itajaí 30 km · Navegantes 30 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 Porto Belo (-27.1578°, -48.5531°, elevation 3 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).