Itatiaia weather in May

In May, Itatiaia sees average daytime highs of 23°C and overnight lows near 14°C, with 77 mm of rain across 11.2 wet days and about 10.9 hours of daylight. It is the 10th-warmest and 9th-wettest month of the year here.

Highs ease over the month, from about 24°C in the first days to 22°C by the end. The sky is clear or mostly clear about 33% of the time in May, and the air most often feels comfortable.

Daylight stretches from about 11 h 12 min at the start of May to 10 h 42 min by month's end. Set against the rest of the year, May is Itatiaia's 4th-clearest and 8th-windiest month. For the whole year in context, see Itatiaia's year-round climate.

Daytime high
23°
10th warmest
Overnight low
14°
4th coldest
Rainfall
77 mm
11.2 wet days
Daylight
10 h 54 min
7:27 AM – 6:22 PM
Cloud cover
56%
4th clearest
Wind
4 km/h
8th windiest
Solar energy
3.7 kWh/m²
Travel score
6.7
out of 10

Itatiaia is human settlement in Brazil.

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

Temperature in May

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 24°C in the first days to 22°C by the end.

A typical May day in Itatiaia reaches about 23°C in the afternoon and slips back to 14°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 19°C and 26°C. Set against its neighbours, May runs about 2°C cooler than April and on par with June.

10°15°20°25°30°151015202531
Avg high (°C)Avg low (°C)
12415
22415
32415
42415
52415
62415
72314
82314
92314
102314
112314
122314
132314
142314
152314
162314
172314
182314
192314
202213
212213
222213
232213
242213
252213
262213
272213
282213
292213
302213
312213

Itatiaia weather by month

How May compares with the rest of the year at a glance. May is the 10th-warmest and 9th-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 May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 33% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 19% of May, with mostly cloudy or overcast conditions the remaining 48%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15743
25743
35743
45644
55644
65545
75545
85347
95248
105149
115050
124951
134951
144852
154852
164852
174753
184852
194852
204951
214951
224951
235050
245149
255149
265149
275248
285248
295347
305446
315446

Chance of precipitation in May

Any precipitation

Itatiaia gets around 77 mm of rain over 11.2 wet days in May. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 37% and peaks near 39% on the wettest days.

0%10%20%30%40%50%151015202531
Rain chance (%)
139
238
338
437
537
636
736
836
936
1036
1137
1237
1337
1437
1537
1637
1737
1837
1937
2037
2137
2237
2337
2437
2537
2636
2736
2836
2935
3035
3134

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, May lands in the comfortable band about 48% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
1940455
21042445
31142434
41243423
51344403
61445392
71545382
81546372
91646362
101747351
111747351
121847341
131948331
141948321
152048311
162148301
172149291
182249281
192350270
202351260
212451250
222451250
232551240
242651230
252751220
262752210
272852200
282952190
292952190
303052180
313052180

Wind in May

Winds average 4 km/h in May.

Across May, 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 May

DaylightNight

Daylight runs from about 11 h 12 min at the start of May to 10 h 42 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 30 minutes over May. Sunrise moves from 7:20 AM to 7:34 AM, and sunset from 6:31 PM to 6:18 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.27:206:31
211.27:206:30
311.17:216:29
411.17:216:29
511.17:226:28
611.17:226:28
711.17:236:27
811.17:236:26
911.07:246:26
1011.07:246:25
1111.07:246:25
1211.07:256:24
1311.07:256:24
1411.07:266:23
1510.97:266:23
1610.97:276:22
1710.97:276:22
1810.97:286:21
1910.97:286:21
2010.97:296:21
2110.97:296:20
2210.87:306:20
2310.87:306:20
2410.87:306:19
2510.87:316:19
2610.87:316:19
2710.87:326:18
2810.87:326:18
2910.87:336:18
3010.77:336:18
3110.77:346:18

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 3.7 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 — May's 3.7 kWh/m² sits near the bottom.

012345151015202531
Solar energy (kWh/m²)Level
14.1Bright
24.1Bright
34.0Bright
44.0Bright
54.0Moderate
63.9Moderate
73.9Moderate
83.9Moderate
93.8Moderate
103.8Moderate
113.8Moderate
123.7Moderate
133.7Moderate
143.7Moderate
153.6Moderate
163.6Moderate
173.6Moderate
183.6Moderate
193.6Moderate
203.5Moderate
213.5Moderate
223.5Moderate
233.5Moderate
243.5Moderate
253.5Moderate
263.5Moderate
273.5Moderate
283.5Moderate
293.5Moderate
303.5Moderate
313.5Moderate
Planning a trip in May

Hazard calendar for Itatiaia

In seasonPeak

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

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 May a good time to visit Itatiaia?

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

6.7
Sightseeing
4th-best month of the year
5.1
Beach & pool
6th-best month of the year

May is a reasonable time to visit Itatiaia for sightseeing.

What to pack for Itatiaia in May

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

In May, Itatiaia sees daytime highs around 23°C and nights near 14°C. Worth packing: light clothes and rain gear. About 11 days see rain.

light clothesrain gear

Sea temperature near Itatiaia in May

The nearest coast averages about 24°C in May — 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 May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 7 — enough to warrant sun protection. 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 May

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where May 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
May 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).