Ilha Grande weather in January

In January, Ilha Grande sees average daytime highs of 28°C and overnight lows near 26°C, with 146 mm of rain across 21.3 wet days and about 12.1 hours of daylight. It is the 9th-warmest and 5th-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 21% of the time in January, and the air most often feels oppressive.

Daylight stretches from about 12 h 12 min at the start of January to 12 h 06 min by month's end. Set against the rest of the year, January is Ilha Grande's 9th-clearest and 7th-windiest month. For the whole year in context, see Ilha Grande's year-round climate.

Daytime high
28°
9th warmest
Overnight low
26°
7th coldest
Rainfall
146 mm
21.3 wet days
Daylight
12 h 06 min
5:52 AM – 6:01 PM
Cloud cover
66%
9th clearest
Wind
22 km/h
7th windiest
Solar energy
5.7 kWh/m²
Travel score
4.3
out of 10

Temperature in January

Average highAverage lowShaded bands: 10–90% of days

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

A typical January day in Ilha Grande reaches about 28°C in the afternoon and slips back to 26°C overnight — a 3°C spread between the day's warmth and the night's chill. On most days the high lands between 27°C and 29°C. Set against its neighbours, January runs on par with December and on par with February.

20°23°25°28°30°151015202531
Avg high (°C)Avg low (°C)
12926
22926
32926
42926
52926
62926
72826
82826
92826
102826
112826
122826
132826
142826
152826
162826
172826
182826
192826
202826
212826
222826
232826
242826
252826
262826
272826
282826
292826
302826
312826

How January really feels in Ilha Grande

Once humidity and wind are folded in, January averages 10 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
10
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

The story in January is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Ilha Grande weather by month

How January compares with the rest of the year at a glance. January is the 9th-warmest and 5th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan28° / 26°14621.312.14.3
Feb28° / 26°21123.712.13.9
Mar28° / 25°32328.3123.7
Apr28° / 26°34327.311.93.5
May29° / 26°17820.711.94.3
Jun29° / 26°5111.311.85.5
Jul29° / 26°224.311.96.5
Aug30° / 26°20.411.97.0
Sep29° / 26°10.2127.2
Oct29° / 26°60.812.17.1
Nov29° / 26°71.612.16.8
Dec29° / 26°347.712.25.9

Cloud cover in January

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 21% of the time in January.

Beyond those clear spells, partly cloudy skies cover about 18% of January, with mostly cloudy or overcast conditions the remaining 61%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14951
24753
34654
44654
54456
64456
74258
84258
94159
104060
114060
124060
133961
143862
153763
163763
173763
183763
193763
203763
213763
223763
233664
243664
253565
263565
273664
283664
293565
303565
313565

Chance of precipitation in January

Any precipitation

Ilha Grande gets around 146 mm of rain over 21.3 wet days in January. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 68% and peaks near 75% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%151015202531
Rain chance (%)
151
253
355
456
558
660
761
862
964
1065
1166
1268
1369
1470
1571
1672
1772
1873
1973
2074
2174
2274
2374
2475
2575
2675
2775
2875
2975
3075
3175

Humidity in January

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, January lands in the oppressive band about 75% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Oppressive (%)Miserable (%)
17624
27624
37624
47723
57723
67822
77822
87822
97822
107921
117921
127921
137921
147822
157822
167723
177624
187624
197525
207426
217327
227327
237327
247228
257228
267228
277129
287129
297030
307030
316931

Wind in January

Winds average 22 km/h in January.

Across January, daily wind ranges from about 21 km/h on the calmest days to 24 km/h at its breeziest. It stays fairly steady from day to day.

0102030151015202531
Wind speed (km/h)Feels
124breezy
224breezy
324breezy
423breezy
523breezy
623breezy
723breezy
823breezy
922breezy
1022breezy
1122breezy
1222breezy
1322breezy
1422breezy
1521breezy
1621breezy
1721breezy
1821breezy
1921breezy
2021breezy
2121breezy
2221breezy
2321breezy
2421breezy
2521breezy
2621breezy
2721breezy
2821breezy
2921breezy
3021breezy
3121breezy

Sunrise & sunset in January

DaylightNight

Daylight runs from about 12 h 12 min at the start of January to 12 h 06 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 6 minutes over January. Sunrise moves from 5:46 AM to 5:57 AM, and sunset from 5:55 PM to 6:04 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.25:465:55
212.25:465:56
312.25:465:56
412.25:475:57
512.25:475:57
612.25:485:57
712.25:485:58
812.25:495:58
912.25:495:59
1012.25:505:59
1112.25:505:59
1212.25:506:00
1312.25:516:00
1412.25:516:00
1512.15:526:01
1612.15:526:01
1712.15:526:01
1812.15:536:02
1912.15:536:02
2012.15:546:02
2112.15:546:02
2212.15:546:03
2312.15:556:03
2412.15:556:03
2512.15:556:03
2612.15:566:04
2712.15:566:04
2812.15:566:04
2912.15:566:04
3012.15:576:04
3112.15:576:04

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 5.7 kWh/m².

For context, solar energy here swings from a low near 4.98 kWh/m² to a high of 7.04 kWh/m² in October across the year — January's 5.7 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.9Bright
25.9Bright
35.8Bright
45.8Bright
55.8Bright
65.8Bright
75.8Bright
85.8Bright
95.7Bright
105.7Bright
115.7Bright
125.7Bright
135.7Bright
145.7Bright
155.7Bright
165.7Bright
175.7Bright
185.6Bright
195.6Bright
205.6Bright
215.6Bright
225.6Bright
235.6Bright
245.6Bright
255.6Bright
265.7Bright
275.7Bright
285.7Bright
295.7Bright
305.7Bright
315.7Bright
Planning a trip in January

Hazard calendar for Ilha Grande

In seasonPeak

None of Ilha Grande's seasonal hazards are active in January. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

Ilha Grande's monsoon runs February–May, when most of the year's rain falls.

Monsoon
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is January a good time to visit Ilha Grande?

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

4.3
Sightseeing
8th-best month of the year
5.2
Beach & pool
9th-best month of the year

January is a reasonable time to visit Ilha Grande for sightseeing.

What to pack for Ilha Grande in January

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

In January, Ilha Grande sees daytime highs around 28°C and nights near 26°C. Pack light clothes and rain gear. Worth having: sun protection and a windbreaker. About 21 days see rain.

light clothesrain gearsun protectiona windbreaker

Sea temperature near Ilha Grande in January

The nearest coast averages about 28°C in January — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 21 km away) is warmest in May at about 29°C and coldest in September near 27°C.

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

26°28°30°JanFebMarAprMayJunJulAugSepOctNovDecwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan28Tropical
Feb28Tropical
Mar29Tropical
Apr29Tropical
May29Tropical
Jun29Tropical
Jul28Warm
Aug27Warm
Sep27Warm
Oct27Warm
Nov28Warm
Dec28Tropical

UV index in Ilha Grande in January

LowModerateHighVery highExtreme

Clear-sky midday UV in January 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 Ilha Grande peaks around March 17 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 14 at about 10 (extreme).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeMar 17UV 15Jul 14UV 10
UV index (midday)Level
Jan13Extreme
Feb14Extreme
Mar16Extreme
Apr14Extreme
May12Extreme
Jun10Extreme
Jul10Extreme
Aug10Extreme
Sep12Extreme
Oct12Extreme
Nov11Extreme
Dec11Extreme

Air quality in Ilha Grande in January

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in Ilha Grande is worst in December — around 18 µg/m³ PM2.5 (moderate), about 3.0× the cleanest month (August, 6 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModerateDec 1217 µg/m³Aug 216 µg/m³
PM2.5 (µg/m³)Level
Jan12Moderate
Feb15Moderate
Mar13Moderate
Apr11Good
May8Good
Jun7Good
Jul9Good
Aug6Good
Sep7Good
Oct10Good
Nov16Moderate
Dec18Moderate
Location & terrain

Where is Ilha Grande?

Ilha Grande sits at 2.9°S, 41.8°W, 0 m above sea level, in Brazil. The nearest listed city is Parnaíba, 7.0 km away.

Topography around Ilha Grande

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

Within 3 km, the terrain around Ilha Grande has only modest variations in elevation — a maximum elevation change of 24 m around an average of 4 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 45 m; within 80 km, large variations in elevation — a maximum elevation change of 656 m.

The land around Ilha Grande is covered by grassland (49%) and trees (22%) within 3 km, grassland (32%) within 16 km, and trees (38%) and water (35%) within 80 km.

3 km
24 m
16 km
45 m
80 km
656 m
treesshrubsgrasslandartificial surfacesbare terrainwaterwetlandmangroves
January weather nearby: Parnaíba 7.0 km · Araioses 10 km · Luís Correia 17 km · Buriti dos Lopes 36 km · Tutóia 52 km · Cocal 75 km · Paulino Neves 81 km · São Bernardo 88 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 Ilha Grande (-2.8521°, -41.8169°, elevation 0 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).