Itatiaia weather in January

In January, Itatiaia sees average daytime highs of 27°C and overnight lows near 19°C, with 404 mm of rain across 24.9 wet days and about 13.2 hours of daylight. It is the 2nd-warmest and 1st-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 13% of the time in January, and the air most often feels muggy.

Daylight stretches from about 13 h 24 min at the start of January to 13 hours by month's end. Set against the rest of the year, January is Itatiaia's 11th-clearest and 8th-windiest month. For the whole year in context, see Itatiaia's year-round climate.

Daytime high
27°
2nd warmest
Overnight low
19°
12th coldest
Rainfall
404 mm
24.9 wet days
Daylight
13 h 12 min
6:30 AM – 7:45 PM
Cloud cover
77%
11th clearest
Wind
4 km/h
8th windiest
Solar energy
5.29 kWh/m²
Travel score
4.2
out of 10

Itatiaia is human settlement in Brazil.

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

Temperature in January

Average highAverage lowShaded bands: 10–90% of days

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

A typical January day in Itatiaia reaches about 27°C in the afternoon and slips back to 19°C overnight — a 8°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, January runs on par with December and on par with February.

15°20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
12719
22719
32719
42719
52719
62719
72719
82719
92719
102719
112719
122719
132719
142719
152719
162719
172719
182719
192719
202719
212719
222719
232719
242719
252719
262719
272719
282719
292719
302719
312719

Itatiaia weather by month

How January compares with the rest of the year at a glance. January is the 2nd-warmest and 1st-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan27° / 19°40424.913.24.2
Feb27° / 18°3072012.84.6
Mar26° / 18°30722.712.24.7
Apr25° / 16°13215.111.56.0
May23° / 14°7711.210.96.7
Jun22° / 12°457.710.67.3
Jul22° / 12°457.410.87.3
Aug23° / 12°477.511.27.5
Sep24° / 14°11513.711.96.4
Oct25° / 16°19419.112.55.3
Nov25° / 17°31022.613.14.6
Dec26° / 18°38025.213.44.2

Cloud cover in January

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 13% of the time in January.

Beyond those clear spells, partly cloudy skies cover about 12% of January, with mostly cloudy or overcast conditions the remaining 75%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
12278
22377
32476
42377
52377
62377
72476
82476
92476
102476
112476
122575
132575
142674
152674
162674
172575
182575
192575
202476
212476
222575
232575
242575
252575
262773
272773
282773
292872
303070
313070

Chance of precipitation in January

Any precipitation

Itatiaia gets around 404 mm of rain over 24.9 wet days in January, the wettest month. 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 84% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%80%151015202531
Rain chance (%)
184
284
383
483
582
682
781
881
980
1080
1179
1279
1379
1479
1579
1680
1780
1880
1980
2080
2180
2280
2380
2479
2579
2678
2778
2877
2976
3075
3175

Humidity in January

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, January lands in the muggy band about 69% of days. Sticky, muggy-or-worse air turns up on roughly 70% of them.

0%25%50%75%100%151015202531
Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1229690
2229690
3229690
4229690
5229690
6129700
7129700
8130690
9130690
10130690
11131680
12131680
13131680
14131680
15130690
16130690
17130690
18129700
19229690
20228700
21228700
22227710
23227710
24227710
25226720
26226711
27226711
28226711
29227701
30227701
31228691

Wind in January

Winds average 4 km/h in January.

Across January, daily wind ranges from about 4 km/h on the calmest days to 4 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
14calm
24calm
34calm
44calm
54calm
64calm
74calm
84calm
94calm
104calm
114calm
124calm
134calm
144calm
154calm
164calm
174calm
184calm
194calm
204calm
214calm
224calm
234calm
244calm
254calm
264calm
274calm
284calm
294calm
304calm
314calm

Sunrise & sunset in January

DaylightNight

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

Days shrink by about 24 minutes over January. Sunrise moves from 6:21 AM to 6:40 AM, and sunset from 7:42 PM to 7:43 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.46:217:42
213.46:217:42
313.36:227:43
413.36:237:43
513.36:237:43
613.36:247:43
713.36:247:44
813.36:257:44
913.36:267:44
1013.36:267:44
1113.36:277:44
1213.36:287:44
1313.36:287:45
1413.36:297:45
1513.26:307:45
1613.26:307:45
1713.26:317:45
1813.26:327:45
1913.26:327:45
2013.26:337:45
2113.26:347:45
2213.26:347:44
2313.26:357:44
2413.16:367:44
2513.16:367:44
2613.16:377:44
2713.16:387:44
2813.16:387:43
2913.16:397:43
3013.16:407:43
3113.06:407:43

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 5.29 kWh/m².

For context, solar energy here swings from a low near 3.55 kWh/m² to a high of 5.52 kWh/m² in February across the year — January's 5.29 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.3Bright
25.3Bright
35.3Bright
45.3Bright
55.3Bright
65.3Bright
75.3Bright
85.3Bright
95.3Bright
105.3Bright
115.3Bright
125.3Bright
135.3Bright
145.3Bright
155.3Bright
165.4Bright
175.4Bright
185.4Bright
195.4Bright
205.4Bright
215.4Bright
225.4Bright
235.4Bright
245.4Bright
255.4Bright
265.4Bright
275.5Bright
285.5Bright
295.5Bright
305.5Bright
315.5Bright
Planning a trip in January

Hazard calendar for Itatiaia

In seasonPeak

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

Itatiaia'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 January a good time to visit Itatiaia?

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

4.2
Sightseeing
11th-best month of the year
4.3
Beach & pool
10th-best month of the year

January is a reasonable time to visit Itatiaia for sightseeing.

What to pack for Itatiaia in January

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

In January, Itatiaia sees daytime highs around 27°C and nights near 19°C. Pack light clothes and rain gear. Worth having: sun protection. About 25 days see rain.

light clothesrain gearsun protection

Sea temperature near Itatiaia in January

The nearest coast averages about 27°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 70 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°JanFebMarAprMayJunJulAugSepOctNovDeccoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan27Warm
Feb27Warm
Mar27Warm
Apr26Warm
May24Warm
Jun23Refreshing
Jul22Refreshing
Aug21Refreshing
Sep22Refreshing
Oct23Refreshing
Nov23Refreshing
Dec25Warm

UV index in Itatiaia in January

LowModerateHighVery highExtreme

Clear-sky midday UV in January peaks around 15 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Itatiaia peaks around February 9 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 11 at about 6 (high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highHighVery highExtremeFeb 9UV 15Jul 11UV 6
UV index (midday)Level
Jan15Extreme
Feb15Extreme
Mar13Extreme
Apr10Very high
May7Very high
Jun6High
Jul6High
Aug8Very high
Sep7Very high
Oct12Extreme
Nov14Extreme
Dec14Extreme

Air quality in Itatiaia 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 Itatiaia is worst in September — around 33 µg/m³ PM2.5 (moderate), about 2.1× the cleanest month (December, 15 µg/m³).

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecModerateSep 1332 µg/m³Dec 2115 µg/m³
PM2.5 (µg/m³)Level
Jan16Moderate
Feb16Moderate
Mar17Moderate
Apr19Moderate
May24Moderate
Jun29Moderate
Jul31Moderate
Aug27Moderate
Sep33Moderate
Oct20Moderate
Nov17Moderate
Dec15Moderate
Location & terrain

Where is Itatiaia?

Itatiaia sits at 22.5°S, 44.6°W, 406 m above sea level, in Brazil. The nearest listed city is Resende, 12 km away.

Topography around Itatiaia

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

Within 3 km, the terrain around Itatiaia has significant variations in elevation — a maximum elevation change of 253 m around an average of 452 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 2,300 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,761 m.

The land around Itatiaia is covered by grassland (51%) and trees (30%) within 3 km, trees (49%) and grassland (44%) within 16 km, and trees (50%) and grassland (42%) within 80 km.

3 km
253 m
16 km
2,300 m
80 km
2,761 m
treesgrasslandcroplandartificial surfacesbare terrainwater
January weather nearby: Resende 12 km · Porto Real 29 km · Barra Mansa 41 km · Cruzeiro 43 km · Passa Quatro 43 km · Itanhandu 44 km · Volta Redonda 47 km · Cachoeira Paulista 50 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 Itatiaia (-22.4961°, -44.5633°, elevation 406 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).