São Vicente weather in December

In December, São Vicente sees average daytime highs of 28°C and overnight lows near 22°C, with 235 mm of rain across 22.4 wet days and about 13.5 hours of daylight. It is the 4th-warmest and 4th-wettest month of the year here.

Highs climb over the month, from about 27°C in the first days to 29°C by the end. The sky is clear or mostly clear about 7% of the time in December, and the air most often feels oppressive.

Daylight stretches from about 13 h 24 min at the start of December to 13 h 30 min by month's end. Set against the rest of the year, December is São Vicente's 9th-clearest and 4th-windiest month. For the whole year in context, see São Vicente's year-round climate.

Daytime high
28°
4th warmest
Overnight low
22°
9th coldest
Rainfall
235 mm
22.4 wet days
Daylight
13 h 30 min
6:18 AM – 7:46 PM
Cloud cover
79%
9th clearest
Wind
8 km/h
4th windiest
Solar energy
5.91 kWh/m²
Travel score
4.2
out of 10

São Vicente is human settlement in 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 27°C in the first days to 29°C by the end.

A typical December day in São Vicente reaches about 28°C in the afternoon and slips back to 22°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between 24°C and 32°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)
12721
22721
32721
42721
52721
62721
72721
82721
92721
102721
112821
122821
132821
142821
152822
162822
172822
182822
192822
202822
212822
222822
232822
242922
252922
262922
272922
282922
292922
302922
312922

How December really feels in São Vicente

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.

São Vicente weather by month

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

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan29° / 23°33425.913.33.5
Feb29° / 23°30022.212.83.5
Mar28° / 22°27424.212.24.0
Apr27° / 20°13114.911.55.6
May25° / 18°10512.410.96.5
Jun24° / 16°779.110.57.1
Jul23° / 15°879.210.77.2
Aug24° / 16°719.311.27.1
Sep24° / 17°1251411.96.2
Oct25° / 19°15317.112.65.4
Nov26° / 20°19019.113.24.9
Dec28° / 22°23522.413.54.2

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 7% 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 82%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
11783
21783
31783
41783
51783
61783
71783
81783
91783
101783
111783
121981
131981
141981
151981
161981
171981
181981
192080
202080
212080
222080
232080
242080
252080
261981
271981
281981
291882
301783
311783

Chance of precipitation in December

Any precipitation

São Vicente gets around 235 mm of rain over 22.4 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 73% and peaks near 79% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%151015202531
Rain chance (%)
164
265
366
467
567
668
768
869
969
1070
1170
1271
1372
1472
1573
1673
1774
1874
1974
2075
2175
2275
2376
2476
2577
2677
2778
2878
2979
3079
3179

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 56% of days. Sticky, muggy-or-worse air turns up on roughly 92% of them.

0%25%50%75%100%151015202531
Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
121443401
221443411
311342431
411242441
511241451
611140461
711139481
811139491
911038501
1001037512
110937522
120936532
130936532
140835552
150834562
160833572
170732592
180731593
190731593
200730603
210629614
220628624
230627625
240527635
250526645
260525646
270424666
280424666
290423667
300423667
310423667

Wind in December

Winds average 8 km/h in December.

Across December, daily wind ranges from about 7 km/h on the calmest days to 8 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
18calm
28calm
38calm
48calm
58calm
68calm
78calm
88calm
98calm
108calm
118calm
128calm
138calm
148calm
158calm
168calm
178calm
188calm
198calm
208calm
218calm
228calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm
317calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 13 h 24 min at the start of December to 13 h 30 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 6:14 AM to 6:25 AM, and sunset from 7:37 PM to 7:53 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.46:147:37
213.46:147:37
313.46:147:38
413.46:147:39
513.46:157:39
613.46:157:40
713.46:157:41
813.46:157:41
913.46:157:42
1013.46:167:42
1113.56:167:43
1213.56:167:44
1313.56:177:44
1413.56:177:45
1513.56:177:45
1613.56:187:46
1713.56:187:46
1813.56:187:47
1913.56:197:48
2013.56:197:48
2113.56:207:49
2213.56:207:49
2313.56:217:49
2413.56:217:50
2513.56:227:50
2613.56:227:51
2713.56:237:51
2813.56:237:52
2913.56:247:52
3013.56:247:52
3113.56:257:53

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 5.91 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 3.13 kWh/m² to a high of 5.91 kWh/m² in December across the year — December's 5.91 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
305.9Bright
315.9Bright
Planning a trip in December

Hazard calendar for São Vicente

In seasonPeak

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

São Vicente's rainy season runs October–March, 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 São Vicente?

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

4.2
Sightseeing
9th-best month of the year
4.7
Beach & pool
9th-best month of the year

December is a reasonable time to visit São Vicente for sightseeing.

What to pack for São Vicente in December

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

In December, São Vicente sees daytime highs around 28°C and nights near 22°C. Pack light clothes and rain gear. Worth having: sun protection. About 22 days see rain.

light clothesrain gearsun protection

Sea temperature near São Vicente 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 27°C and coldest in August near 20°C.

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

20°25°JanFebMarAprMayJunJulAugSepOctNovDeccoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan27Warm
Feb27Warm
Mar27Warm
Apr26Warm
May24Refreshing
Jun22Refreshing
Jul21Refreshing
Aug20Refreshing
Sep21Refreshing
Oct22Refreshing
Nov23Refreshing
Dec25Warm

UV index in São Vicente 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 São Vicente peaks around February 10 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 12 at about 5 (moderate).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highHighHighVery highExtremeFeb 10UV 14Jul 12UV 5
UV index (midday)Level
Jan13Extreme
Feb14Extreme
Mar10Very high
Apr8Very high
May6High
Jun5High
Jul5Moderate
Aug7High
Sep7Very high
Oct10Extreme
Nov12Extreme
Dec13Extreme

Air quality in São Vicente in December

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where December falls, not just the annual average.

Air quality in São Vicente is worst in July — around 52 µg/m³ PM2.5 (poor), about 2.1× the cleanest month (February, 24 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

0204060JanFebMarAprMayJunJulAugSepOctNovDecModeratePoorModerateJul 1451 µg/m³Feb 1225 µg/m³
PM2.5 (µg/m³)Level
Jan25Moderate
Feb24Moderate
Mar26Moderate
Apr28Moderate
May36Poor
Jun49Poor
Jul52Poor
Aug47Poor
Sep41Poor
Oct31Moderate
Nov25Moderate
Dec26Moderate
Location & terrain

Where is São Vicente?

São Vicente sits at 24.0°S, 46.4°W, 10 m above sea level, in Brazil. The nearest listed city is Praia Grande, 5.0 km away.

Topography around São Vicente

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

Within 3 km, the terrain around São Vicente has only modest variations in elevation — a maximum elevation change of 225 m around an average of 13 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 941 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,434 m.

The land around São Vicente is covered by artificial surfaces (56%) and water (25%) within 3 km, trees (38%) and water (35%) within 16 km, and water (45%) and trees (39%) within 80 km.

3 km
225 m
16 km
941 m
80 km
1,434 m
treesgrasslandartificial surfacesbare terrainwaterwetlandmangroves
December weather nearby: Praia Grande 5.0 km · Santos 6.0 km · Cubatão 8.0 km · Guarujá 14 km · Rio Grande da Serra 24 km · Mongaguá 27 km · Ribeirão Pires 28 km · Bertioga 28 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 São Vicente (-23.9631°, -46.3919°, elevation 10 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. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).