Santo Antônio do Içá weather in May

In May, Santo Antônio do Içá sees average daytime highs of 30°C and overnight lows near 23°C, with 301 mm of rain across 28.8 wet days and about 11.9 hours of daylight. It is the 10th-warmest and 3rd-wettest month of the year here.

Day-to-day highs hold fairly steady near 30°C through the month. The sky is clear or mostly clear about 1% of the time in May, and the air most often feels miserable.

Daylight stretches from about 11 h 54 min at the start of May to 11 h 48 min by month's end. Set against the rest of the year, May is Santo Antônio do Içá's 8th-clearest and 3rd-windiest month. For the whole year in context, see Santo Antônio do Içá's year-round climate.

Daytime high
30°
10th warmest
Overnight low
23°
5th coldest
Rainfall
301 mm
28.8 wet days
Daylight
11 h 54 min
6:32 AM – 6:24 PM
Cloud cover
86%
8th clearest
Wind
4 km/h
3rd windiest
Solar energy
3.72 kWh/m²
Travel score
2.9
out of 10

Santo Antônio do Içá 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 30°C through the month.

A typical May day in Santo Antônio do Içá reaches about 30°C in the afternoon and slips back to 23°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between 27°C and 31°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
113023
122923
132923
142923
152923
162923
172923
182923
192923
202923
212923
222923
232923
242923
252923
262923
272923
282923
292923
302923
312923

How May really feels in Santo Antônio do Içá

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.

Santo Antônio do Içá weather by month

How May compares with the rest of the year at a glance. May is the 10th-warmest and 3rd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan30° / 24°27728.312.22.7
Feb30° / 24°27625.512.12.7
Mar30° / 24°32329.1122.6
Apr30° / 23°32628.211.92.7
May30° / 23°30128.811.92.9
Jun29° / 23°20626.111.83.2
Jul30° / 22°15424.811.83.4
Aug31° / 23°13023.311.93.3
Sep31° / 23°14323122.9
Oct31° / 24°18825.612.12.7
Nov31° / 24°21926.212.12.6
Dec31° / 24°26628.812.22.6

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 1% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 7% of May, with mostly cloudy or overcast conditions the remaining 92%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
1496
2496
3496
4496
5496
6595
7595
8595
9694
10694
11694
12694
13793
14793
15892
16892
17892
18892
19892
20892
21892
221090
231090
241090
251090
261090
271090
281090
291090
301288
311288

Chance of precipitation in May

Any precipitation

Santo Antônio do Içá gets around 301 mm of rain over 28.8 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 93% and peaks near 94% on the wettest days.

0%20%40%60%80%100%151015202531
Rain chance (%)
193
293
393
493
593
693
793
893
993
1093
1193
1293
1393
1493
1594
1694
1793
1893
1993
2093
2193
2293
2393
2492
2592
2692
2791
2891
2991
3090
3190

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, May lands in the miserable band about 63% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Muggy (%)Oppressive (%)Miserable (%)
112970
212970
313069
413069
513168
613168
713168
813267
913267
1013366
1113366
1213465
1313465
1413564
1513564
1613564
1713663
1813663
1913663
2013762
2113861
2213861
2313960
2414059
2514158
2614257
2714356
2814455
2914653
3014752
3114851

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 54 min at the start of May to 11 h 48 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 6:32 AM to 6:34 AM, and sunset from 6:26 PM to 6:24 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.96:326:26
211.96:326:26
311.96:326:25
411.96:326:25
511.96:326:25
611.96:326:25
711.96:326:25
811.96:326:25
911.96:326:24
1011.96:326:24
1111.96:326:24
1211.96:326:24
1311.96:326:24
1411.96:326:24
1511.96:326:24
1611.96:326:24
1711.96:326:24
1811.96:326:24
1911.96:326:24
2011.96:336:24
2111.96:336:24
2211.86:336:24
2311.86:336:24
2411.86:336:24
2511.86:336:24
2611.86:336:24
2711.86:336:24
2811.86:346:24
2911.86:346:24
3011.86:346:24
3111.86:346:24

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 3.72 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 3.72 kWh/m² to a high of 5.19 kWh/m² in October across the year — May's 3.72 kWh/m² sits near the bottom.

01234151015202531
Solar energy (kWh/m²)Level
13.9Moderate
23.9Moderate
33.9Moderate
43.8Moderate
53.8Moderate
63.8Moderate
73.8Moderate
83.8Moderate
93.8Moderate
103.8Moderate
113.7Moderate
123.7Moderate
133.7Moderate
143.7Moderate
153.7Moderate
163.7Moderate
173.7Moderate
183.7Moderate
193.7Moderate
203.7Moderate
213.7Moderate
223.7Moderate
233.7Moderate
243.7Moderate
253.7Moderate
263.7Moderate
273.7Moderate
283.7Moderate
293.7Moderate
303.7Moderate
313.7Moderate
Planning a trip in May

Is May a good time to visit Santo Antônio do Içá?

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

2.9
Sightseeing
4th-best month of the year
3.8
Beach & pool
7th-best month of the year

May is a weaker month for outdoor sightseeing in Santo Antônio do Içá.

What to pack for Santo Antônio do Içá in May

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

In May, Santo Antônio do Içá sees daytime highs around 30°C and nights near 23°C. Pack light clothes and rain gear. About 29 days see rain.

light clothesrain gear

UV index in Santo Antônio do Içá in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May 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 Santo Antônio do Içá peaks around March 10 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near September 9 at about 10 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highExtremeMar 10UV 15Sep 9UV 10
UV index (midday)Level
Jan15Extreme
Feb15Extreme
Mar15Extreme
Apr14Extreme
May13Extreme
Jun11Extreme
Jul10Very high
Aug10Very high
Sep10Very high
Oct12Extreme
Nov13Extreme
Dec12Extreme

Air quality in Santo Antônio do Içá 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 Santo Antônio do Içá is worst in August — around 18 µg/m³ PM2.5 (moderate), about 1.9× the cleanest month (June, 9 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModerateAug 2118 µg/m³Jun 1310 µg/m³
PM2.5 (µg/m³)Level
Jan14Moderate
Feb15Moderate
Mar16Moderate
Apr13Moderate
May10Good
Jun9Good
Jul11Good
Aug18Moderate
Sep16Moderate
Oct13Moderate
Nov13Moderate
Dec12Moderate
Location & terrain

Where is Santo Antônio do Içá?

Santo Antônio do Içá sits at 3.1°S, 67.9°W, 68 m above sea level, in Brazil. The nearest listed city is Tonantins, 30 km away.

LeticiaTabatingaBenjamin ConstantAtalaia do Norte

Topography around Santo Antônio do Içá

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Santo Antônio do Içá.

Within 3 km, the terrain around Santo Antônio do Içá has only modest variations in elevation — a maximum elevation change of 61 m around an average of 65 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 73 m; within 80 km, only modest variations in elevation — a maximum elevation change of 92 m.

The land around Santo Antônio do Içá is covered by trees (52%) and water (38%) within 3 km, trees (82%) within 16 km, and trees (96%) within 80 km.

3 km
61 m
16 km
73 m
80 km
92 m
treesgrasslandartificial surfaceswater
May weather nearby: Tonantins 30 km · São Paulo de Olivença 108 km · Fonte Boa 215 km · Carauari 229 km · Leticia 254 km · Tabatinga 255 km · Benjamin Constant 272 km · Atalaia do Norte 287 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 Santo Antônio do Içá (-3.1022°, -67.9397°, elevation 68 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. 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).