Bertioga weather in December

In December, Bertioga sees average daytime highs of 27°C and overnight lows near 20°C, with 302 mm of rain across 24.8 wet days and about 13.4 hours of daylight. It is the 4th-warmest and 4th-wettest month of the year here.

Day-to-day highs hold fairly steady near 27°C through the month. The sky is clear or mostly clear about 8% of the time in December, and the air most often feels muggy.

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 Bertioga's 9th-clearest and 4th-windiest month. For the whole year in context, see Bertioga's year-round climate.

Daytime high
27°
4th warmest
Overnight low
20°
9th coldest
Rainfall
302 mm
24.8 wet days
Daylight
13 h 30 min
6:17 AM – 7:45 PM
Cloud cover
79%
9th clearest
Wind
7 km/h
4th windiest
Solar energy
5.85 kWh/m²
Travel score
4.2
out of 10

Bertioga 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

Day-to-day highs hold fairly steady near 27°C through the month.

A typical December day in Bertioga reaches about 27°C in the afternoon and slips back to 20°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 23°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)
12619
22619
32619
42619
52619
62619
72619
82619
92619
102619
112619
122619
132619
142720
152720
162720
172720
182720
192720
202720
212720
222720
232720
242720
252720
262720
272720
282720
292720
302720
312720

Bertioga 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
Jan28° / 21°40527.313.33.8
Feb28° / 21°3402412.83.9
Mar27° / 20°32925.812.24.2
Apr26° / 18°14616.811.55.6
May23° / 16°11113.210.96.3
Jun23° / 15°829.410.66.9
Jul22° / 14°949.210.76.9
Aug23° / 14°819.811.26.9
Sep23° / 16°14614.811.96.0
Oct24° / 17°1801812.65.4
Nov25° / 18°24321.313.24.8
Dec27° / 20°30224.813.44.2

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 8% 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 80%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
11981
21981
31882
41882
51882
61882
71882
81981
91981
101981
111981
122080
132179
142179
152179
162179
172179
182179
192278
202179
212278
222278
232179
242179
252080
262080
271981
281981
291981
301882
311882

Chance of precipitation in December

Any precipitation

Bertioga gets around 302 mm of rain over 24.8 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 80% and peaks near 86% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%100%151015202531
Rain chance (%)
172
273
373
474
575
675
776
877
977
1078
1179
1279
1380
1480
1581
1681
1782
1882
1982
2083
2183
2283
2383
2484
2584
2684
2785
2885
2985
3086
3186

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 61% of days. Sticky, muggy-or-worse air turns up on roughly 81% of them.

0%25%50%75%100%151015202531
Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1526618
2525619
3424639
44236310
54236211
64226212
73226312
83216313
93216214
103206314
113206215
122196415
132186416
142186317
152176318
162176219
172166220
182166121
192156122
202156023
212155924
221146025
231145926
241135927
251135828
261125829
271125730
281125631
291125532
301125532
311115533

Wind in December

Winds average 7 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
177calm
187calm
197calm
207calm
217calm
227calm
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 6:13 AM to 6:24 AM, and sunset from 7:35 PM to 7:51 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.46:137:35
213.46:137:36
313.46:137:37
413.46:147:37
513.46:147:38
613.46:147:39
713.46:147:39
813.46:147:40
913.46:157:41
1013.46:157:41
1113.46:157:42
1213.46:157:42
1313.56:167:43
1413.56:167:44
1513.56:167:44
1613.56:177:45
1713.56:177:45
1813.56:187:46
1913.56:187:46
2013.56:187:47
2113.56:197:47
2213.56:197:48
2313.56:207:48
2413.56:207:49
2513.56:217:49
2613.56:217:49
2713.56:227:50
2813.56:227:50
2913.56:237:51
3013.56:247:51
3113.56:247:51

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 5.85 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 3.21 kWh/m² to a high of 5.85 kWh/m² in December across the year — December's 5.85 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
165.8Bright
175.8Bright
185.8Bright
195.8Bright
205.9Bright
215.9Bright
225.9Bright
235.9Bright
245.9Bright
255.9Bright
265.8Bright
275.8Bright
285.8Bright
295.8Bright
305.8Bright
315.8Bright
Planning a trip in December

Hazard calendar for Bertioga

In seasonPeak

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

Bertioga's rainy season runs November–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 Bertioga?

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
4.2
Beach & pool
10th-best month of the year

December is a reasonable time to visit Bertioga for sightseeing.

What to pack for Bertioga in December

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

In December, Bertioga sees daytime highs around 27°C and nights near 20°C. Pack rain gear. Worth having: light clothes and sun protection. About 25 days see rain.

rain gearlight clothessun protection

Sea temperature near Bertioga 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 offshore is warmest in February at about 27°C and coldest in August near 21°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
Aug21Refreshing
Sep21Refreshing
Oct22Refreshing
Nov23Refreshing
Dec25Warm

UV index in Bertioga 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 Bertioga 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 (high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highHighVery highExtremeFeb 10UV 14Jul 12UV 5
UV index (midday)Level
Jan13Extreme
Feb14Extreme
Mar10Very high
Apr9Very high
May6High
Jun5High
Jul5Moderate
Aug7High
Sep7Very high
Oct10Extreme
Nov13Extreme
Dec13Extreme

Air quality in Bertioga 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 Bertioga 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 Bertioga?

Bertioga sits at 23.9°S, 46.1°W, 8 m above sea level, in Brazil. The nearest listed city is Guarujá, 20 km away.

Topography around Bertioga

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

Within 3 km, the terrain around Bertioga has significant variations in elevation — a maximum elevation change of 272 m around an average of 16 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 1,178 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,434 m.

The land around Bertioga is covered by water (43%) and trees (26%) within 3 km, trees (53%) and water (39%) within 16 km, and water (45%) and trees (36%) within 80 km.

3 km
272 m
16 km
1,178 m
80 km
1,434 m
treesgrasslandartificial surfacesbare terrainwatermangroves
December weather nearby: Guarujá 20 km · Santos 23 km · São Vicente 28 km · Rio Grande da Serra 29 km · Cubatão 29 km · Praia Grande 32 km · Ribeirão Pires 32 km · Biritiba Mirim 33 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 Bertioga (-23.8544°, -46.1386°, elevation 8 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).