Ilhabela weather in December

In December, Ilhabela sees average daytime highs of 25°C and overnight lows near 23°C, with 154 mm of rain across 14.1 wet days and about 13.4 hours of daylight. It is the 4th-warmest and 4th-wettest month of the year here.

Highs climb over the month, from about 24°C in the first days to 25°C by the end. The sky is clear or mostly clear about 23% 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 24 min by month's end. Set against the rest of the year, December is Ilhabela's 9th-clearest and 8th-windiest month. For the whole year in context, see Ilhabela's year-round climate.

Daytime high
25°
4th warmest
Overnight low
23°
9th coldest
Rainfall
154 mm
14.1 wet days
Daylight
13 h 30 min
6:14 AM – 7:41 PM
Cloud cover
66%
9th clearest
Wind
13 km/h
8th windiest
Solar energy
5.95 kWh/m²
Travel score
6.1
out of 10

Ilhabela 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 24°C in the first days to 25°C by the end.

A typical December day in Ilhabela reaches about 25°C in the afternoon and slips back to 23°C overnight — a 2°C spread between the day's warmth and the night's chill. On most days the high lands between 22°C and 27°C. Set against its neighbours, December runs about 2°C warmer than November and about 1°C cooler than January.

20°23°25°28°30°151015202531
Avg high (°C)Avg low (°C)
12422
22422
32422
42422
52422
62422
72422
82422
92422
102423
112423
122423
132423
142423
152523
162523
172523
182523
192523
202523
212523
222523
232523
242523
252524
262524
272524
282524
292524
302524
312524

Ilhabela 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
Jan26° / 24°1841613.35.7
Feb26° / 25°13812.512.86.1
Mar26° / 24°17315.312.26.0
Apr24° / 23°11712.611.56.7
May23° / 21°12112.410.96.6
Jun22° / 20°919.810.66.9
Jul21° / 19°102910.76.9
Aug21° / 19°809.411.26.8
Sep21° / 20°13413.911.96.0
Oct22° / 20°1371412.65.9
Nov23° / 21°16215.513.15.8
Dec25° / 23°15414.113.46.1

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 23% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 15% of December, with mostly cloudy or overcast conditions the remaining 62%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13961
23862
33862
43862
53763
63664
73664
83664
93664
103763
113763
123763
133763
143763
153862
163862
173862
183961
193961
204060
213961
224060
234060
243961
253961
263961
273862
283763
293664
303664
313664

Chance of precipitation in December

Any precipitation

Ilhabela gets around 154 mm of rain over 14.1 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 46% and peaks near 48% on the wettest days.

0%20%40%60%151015202531
Rain chance (%)
148
247
348
448
548
648
748
848
947
1047
1147
1247
1346
1446
1545
1645
1745
1844
1944
2043
2143
2243
2343
2444
2544
2645
2746
2846
2947
3047
3148

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 57% of days. Sticky, muggy-or-worse air turns up on roughly 91% of them.

0%25%50%75%100%151015202531
Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
131243401
231243421
321142431
421141451
521140461
621039481
711038491
811037511
911036521
101935541
111934551
121833562
131832572
141830592
151729603
161728613
170727624
180726625
190725635
200724636
210624646
220623647
230622648
240622639
250521659
2605216410
2705206411
2805206411
2905206312
3005206213
3104206313

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 14 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (km/h)Feels
114light breeze
214light breeze
314light breeze
414light breeze
514light breeze
614light breeze
714light breeze
814light breeze
914light breeze
1014light breeze
1114light breeze
1214light breeze
1314light breeze
1413light breeze
1513light breeze
1613light breeze
1713light breeze
1813light breeze
1913light breeze
2013light breeze
2113light breeze
2213light breeze
2313light breeze
2413light breeze
2513light breeze
2613light breeze
2712light breeze
2812light breeze
2912light breeze
3012light breeze
3112light breeze

Sunrise & sunset in December

DaylightNight

Daylight runs from about 13 h 24 min at the start of December to 13 h 24 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 0 minutes over December. Sunrise moves from 6:10 AM to 6:21 AM, and sunset from 7:32 PM to 7:48 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.46:107:32
213.46:107:33
313.46:117:33
413.46:117:34
513.46:117:35
613.46:117:35
713.46:117:36
813.46:117:37
913.46:127:37
1013.46:127:38
1113.46:127:38
1213.46:127:39
1313.46:137:40
1413.56:137:40
1513.56:137:41
1613.56:147:41
1713.56:147:42
1813.56:157:42
1913.56:157:43
2013.56:157:43
2113.56:167:44
2213.56:167:44
2313.56:177:45
2413.56:177:45
2513.56:187:46
2613.56:187:46
2713.56:197:47
2813.56:197:47
2913.56:207:47
3013.56:217:48
3113.46:217:48

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 5.95 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 3.25 kWh/m² to a high of 5.95 kWh/m² in December across the year — December's 5.95 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.9Bright
25.9Bright
35.9Bright
45.9Bright
55.9Bright
65.9Bright
75.9Bright
85.9Bright
95.9Bright
105.9Bright
115.9Bright
125.9Bright
135.9Bright
145.9Bright
155.9Bright
165.9Bright
175.9Bright
185.9Bright
196.0Bright
206.0Bright
216.0Bright
226.0Bright
236.0Bright
246.0Bright
255.9Bright
265.9Bright
275.9Bright
285.9Bright
295.9Bright
305.9Bright
315.9Bright
Planning a trip in December

Is December a good time to visit Ilhabela?

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

6.1
Sightseeing
6th-best month of the year
5.4
Beach & pool
5th-best month of the year

December is a reasonable time to visit Ilhabela for sightseeing.

What to pack for Ilhabela in December

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

In December, Ilhabela sees daytime highs around 25°C and nights near 23°C. Pack rain gear. Worth having: light clothes and sun protection. About 14 days see rain.

rain gearlight clothessun protection

Sea temperature near Ilhabela 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 26 km away) 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°22°24°26°28°JanFebMarAprMayJunJulAugSepOctNovDeccoolrefreshingwarmcomfortable to swim
Sea temperature (°C)Comfort
Jan26Warm
Feb27Warm
Mar26Warm
Apr25Warm
May24Refreshing
Jun22Refreshing
Jul21Refreshing
Aug21Refreshing
Sep21Refreshing
Oct22Refreshing
Nov23Refreshing
Dec25Warm

UV index in Ilhabela in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 14 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Ilhabela peaks around January 24 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 11 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 highExtremeJan 24UV 14Jul 11UV 5
UV index (midday)Level
Jan14Extreme
Feb14Extreme
Mar11Extreme
Apr9Very high
May7High
Jun6High
Jul5High
Aug8Very high
Sep8Very high
Oct11Extreme
Nov13Extreme
Dec14Extreme
Location & terrain

Where is Ilhabela?

Ilhabela sits at 23.8°S, 45.4°W, 7 m above sea level, in Brazil. The nearest listed city is São Sebastião, 6.0 km away.

Topography around Ilhabela

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

Within 3 km, the terrain around Ilhabela has large variations in elevation — a maximum elevation change of 991 m around an average of 145 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,359 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,647 m.

The land around Ilhabela is covered by water (52%) and trees (41%) within 3 km, trees (50%) and water (45%) within 16 km, and water (54%) and trees (33%) within 80 km.

3 km
991 m
16 km
1,359 m
80 km
1,647 m
treesgrasslandartificial surfaceswater
December weather nearby: São Sebastião 6.0 km · Caraguatatuba 18 km · Ubatuba 48 km · Paraibuna 53 km · Salesópolis 57 km · Biritiba Mirim 73 km · Bertioga 80 km · Guararema 80 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 Ilhabela (-23.7781°, -45.3581°, elevation 7 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).