Igarapé-Açu weather in May

In May, Igarapé-Açu sees average daytime highs of 31°C and overnight lows near 23°C, with 245 mm of rain across 27.2 wet days and about 11.9 hours of daylight. It is the 9th-warmest and 4th-wettest month of the year here.

Day-to-day highs hold fairly steady near 31°C through the month. The sky is clear or mostly clear about 7% of the time in May, and the air most often feels oppressive.

Daylight stretches from about 12 hours at the start of May to 11 h 54 min by month's end. Set against the rest of the year, May is Igarapé-Açu's 8th-clearest and 11th-windiest month. For the whole year in context, see Igarapé-Açu's year-round climate.

Daytime high
31°
9th warmest
Overnight low
23°
7th coldest
Rainfall
245 mm
27.2 wet days
Daylight
11 h 54 min
6:08 AM – 6:05 PM
Cloud cover
77%
8th clearest
Wind
7 km/h
11th windiest
Solar energy
4.22 kWh/m²
Travel score
2.8
out of 10

Igarapé-Açu 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

Day-to-day highs hold fairly steady near 31°C through the month.

A typical May day in Igarapé-Açu reaches about 31°C in the afternoon and slips back to 23°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 29°C and 32°C. Set against its neighbours, May runs on par with April and on par with June.

20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
13023
23023
33023
43023
53023
63023
73023
83023
93023
103023
113123
123123
133123
143123
153123
163123
173123
183123
193123
203123
213123
223123
233123
243123
253123
263123
273123
283123
293123
303123
313123

How May really feels in Igarapé-Açu

Once humidity and wind are folded in, May averages 31 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
31
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

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

Igarapé-Açu weather by month

How May compares with the rest of the year at a glance. May is the 9th-warmest and 4th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan31° / 23°21325.912.12.8
Feb30° / 23°28426.6122.7
Mar30° / 23°37330.2122.6
Apr30° / 23°34829.5122.6
May31° / 23°24527.211.92.8
Jun31° / 23°11421.111.93.3
Jul31° / 23°851811.93.7
Aug32° / 23°4312.4124.0
Sep33° / 23°277.7124.0
Oct33° / 24°225.5123.9
Nov33° / 24°336.612.13.7
Dec32° / 24°8014.512.13.3

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 7% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 18% of May, 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 (%)
11189
21189
31387
41486
51486
61585
71783
81783
91882
101981
112179
122179
132278
142476
152575
162674
172773
182773
192872
202872
213070
223070
233070
243268
253268
263466
273466
283664
293862
303862
314060

Chance of precipitation in May

Any precipitation

Igarapé-Açu gets around 245 mm of rain over 27.2 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 87% and peaks near 96% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%80%100%151015202531
Rain chance (%)
196
295
395
494
594
693
793
892
991
1091
1190
1289
1388
1488
1587
1686
1786
1885
1985
2084
2184
2284
2383
2483
2582
2682
2781
2880
2980
3079
3178

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, May lands in the oppressive band about 60% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Oppressive (%)Miserable (%)
15743
25644
35644
45545
55545
65545
75545
85446
95446
105446
115545
125545
135644
145644
155743
165842
175842
185941
196040
206139
216238
226337
236436
246535
256733
266832
276931
287129
297228
307327
317426

Wind in May

Winds average 7 km/h in May.

Across May, daily wind ranges from about 7 km/h on the calmest days to 7 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
17calm
27calm
37calm
47calm
57calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm
317calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 12 hours at the start of May to 11 h 54 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 6 minutes over May. Sunrise moves from 6:09 AM to 6:10 AM, and sunset from 6:07 PM to 6:06 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.06:096:07
212.06:096:06
312.06:096:06
412.06:096:06
512.06:086:06
612.06:086:06
712.06:086:06
812.06:086:06
912.06:086:06
1012.06:086:05
1112.06:086:05
1212.06:086:05
1312.06:086:05
1412.06:086:05
1511.96:086:05
1611.96:086:05
1711.96:086:05
1811.96:086:05
1911.96:086:05
2011.96:086:05
2111.96:096:05
2211.96:096:05
2311.96:096:05
2411.96:096:05
2511.96:096:05
2611.96:096:06
2711.96:096:06
2811.96:096:06
2911.96:096:06
3011.96:106:06
3111.96:106:06

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 4.22 kWh/m².

For context, solar energy here swings from a low near 3.82 kWh/m² to a high of 6 kWh/m² in October across the year — May's 4.22 kWh/m² falls in the middle.

024151015202531
Solar energy (kWh/m²)Level
13.9Moderate
23.9Moderate
33.9Moderate
44.0Moderate
54.0Moderate
64.0Bright
74.0Bright
84.1Bright
94.1Bright
104.1Bright
114.1Bright
124.2Bright
134.2Bright
144.2Bright
154.2Bright
164.3Bright
174.3Bright
184.3Bright
194.3Bright
204.3Bright
214.3Bright
224.4Bright
234.4Bright
244.4Bright
254.4Bright
264.4Bright
274.5Bright
284.5Bright
294.5Bright
304.5Bright
314.5Bright
Planning a trip in May

Hazard calendar for Igarapé-Açu

In seasonPeak

In May, Igarapé-Açu sits inside its monsoon season. The full year is below, with each hazard's peak months called out.

Igarapé-Açu's monsoon runs January–May, when most of the year's rain falls.

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

Is May a good time to visit Igarapé-Açu?

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

2.8
Sightseeing
8th-best month of the year
4.1
Beach & pool
9th-best month of the year

May is a weaker month for outdoor sightseeing in Igarapé-Açu.

What to pack for Igarapé-Açu in May

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

In May, Igarapé-Açu sees daytime highs around 31°C and nights near 23°C. Pack light clothes and rain gear. About 27 days see rain.

light clothesrain gear

Sea temperature near Igarapé-Açu in May

The nearest coast averages about 29°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 62 km away) is warmest in June at about 29°C and coldest in February near 28°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
Mar28Tropical
Apr28Tropical
May29Tropical
Jun29Tropical
Jul28Tropical
Aug28Tropical
Sep28Tropical
Oct28Tropical
Nov28Tropical
Dec28Tropical

UV index in Igarapé-Açu in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 12 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Igarapé-Açu peaks around March 16 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 18 at about 10 (extreme).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeMar 16UV 15Jul 18UV 10
UV index (midday)Level
Jan13Extreme
Feb14Extreme
Mar15Extreme
Apr14Extreme
May12Extreme
Jun11Extreme
Jul10Extreme
Aug11Extreme
Sep12Extreme
Oct12Extreme
Nov10Extreme
Dec11Extreme

Air quality in Igarapé-Açu 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 Igarapé-Açu is worst in November — around 21 µg/m³ PM2.5 (moderate), about 2.7× the cleanest month (July, 8 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModerateNov 2020 µg/m³Jul 128 µg/m³
PM2.5 (µg/m³)Level
Jan17Moderate
Feb20Moderate
Mar20Moderate
Apr15Moderate
May10Good
Jun8Good
Jul8Good
Aug9Good
Sep11Good
Oct13Moderate
Nov21Moderate
Dec19Moderate
Location & terrain

Where is Igarapé-Açu?

Igarapé-Açu sits at 1.1°S, 47.6°W, 39 m above sea level, in Brazil. The nearest listed city is Santa Maria do Pará, 25 km away.

Topography around Igarapé-Açu

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

Within 3 km, the terrain around Igarapé-Açu has only modest variations in elevation — a maximum elevation change of 49 m around an average of 44 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 70 m; within 80 km, only modest variations in elevation — a maximum elevation change of 112 m.

The land around Igarapé-Açu is covered by trees (53%) and grassland (37%) within 3 km, trees (64%) and grassland (36%) within 16 km, and trees (58%) and grassland (21%) within 80 km.

3 km
49 m
16 km
70 m
80 km
112 m
treesgrasslandartificial surfaceswaterwetlandmangroves
May weather nearby: Santa Maria do Pará 25 km · Castanhal 39 km · Maracanã 44 km · Marapanim 47 km · Capanema 49 km · Curuçá 51 km · Santo Antônio do Tauá 57 km · São Miguel do Guamá 57 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 Igarapé-Açu (-1.1289°, -47.62°, elevation 39 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).