Formoso do Araguaia weather in May

In May, Formoso do Araguaia sees average daytime highs of 33°C and overnight lows near 23°C, with 31 mm of rain across 4.9 wet days and about 11.5 hours of daylight. It is the 6th-warmest and 8th-wettest month of the year here.

Day-to-day highs hold fairly steady near 33°C through the month. The sky is clear or mostly clear about 42% of the time in May, and the air most often feels muggy.

Daylight stretches from about 11 h 36 min at the start of May to 11 h 24 min by month's end. Set against the rest of the year, May is Formoso do Araguaia's 5th-clearest and 5th-windiest month. For the whole year in context, see Formoso do Araguaia's year-round climate.

Daytime high
33°
6th warmest
Overnight low
23°
4th coldest
Rainfall
31 mm
4.9 wet days
Daylight
11 h 30 min
6:31 AM – 5:58 PM
Cloud cover
51%
5th clearest
Wind
7 km/h
5th windiest
Solar energy
4.96 kWh/m²
Travel score
4.1
out of 10

Temperature in May

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 33°C through the month.

A typical May day in Formoso do Araguaia reaches about 33°C in the afternoon and slips back to 23°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 30°C and 35°C. Set against its neighbours, May runs about 1°C warmer than April and on par with June.

20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
13223
23223
33223
43223
53223
63223
73223
83223
93323
103323
113323
123323
133323
143323
153323
163323
173323
183323
193323
203323
213323
223323
233323
243323
253323
263322
273322
283322
293322
303322
313322

How May really feels in Formoso do Araguaia

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.

Formoso do Araguaia weather by month

How May compares with the rest of the year at a glance. May is the 6th-warmest and 8th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan31° / 23°29126.412.62.9
Feb31° / 23°25623.612.42.8
Mar31° / 23°26325.512.12.9
Apr32° / 23°1501711.73.4
May33° / 23°314.911.54.1
Jun33° / 22°20.411.34.5
Jul34° / 21°0011.44.3
Aug35° / 23°10.311.63.2
Sep36° / 24°193.211.92.4
Oct34° / 24°10914.312.32.7
Nov32° / 23°21822.112.52.9
Dec31° / 23°26224.612.72.9

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 42% 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 39%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15347
25446
35446
45446
55446
65446
75446
85446
95446
105446
115545
125545
135644
145743
155743
165842
175941
186040
196238
206337
216436
226535
236733
246733
256832
267030
277129
287327
297426
307624
317624

Chance of precipitation in May

Any precipitation

Formoso do Araguaia gets around 31 mm of rain over 4.9 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 16% and peaks near 30% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%40%151015202531
Rain chance (%)
130
229
327
426
525
623
722
821
921
1020
1119
1219
1318
1417
1517
1616
1715
1815
1914
2013
2113
2212
2312
2411
2510
269
279
288
297
307
316

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, May lands in the muggy band about 42% of days. Sticky, muggy-or-worse air turns up on roughly 82% of them.

0%25%50%75%100%151015202531
Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
10429634
20531604
30532594
40633574
50734554
60836533
70937513
80938503
901039482
1001140472
1101241452
1201242441
1301343431
1401444411
1501445391
1601546381
1711647360
1811648350
1911748340
2011848330
2111948310
2222147300
2322247290
2422446270
2532646260
2632845240
2733044220
2843244210
2943443190
3053642170
3153841160

Wind in May

Winds average 7 km/h in May.

Across May, daily wind ranges from about 6 km/h on the calmest days to 8 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
16calm
26calm
37calm
47calm
57calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
197calm
207calm
217calm
227calm
238calm
248calm
258calm
268calm
278calm
288calm
298calm
308calm
318calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 11 h 36 min at the start of May to 11 h 24 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 12 minutes over May. Sunrise moves from 6:28 AM to 6:35 AM, and sunset from 6:03 PM to 5:56 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.66:286:03
211.66:286:03
311.66:286:02
411.66:286:02
511.66:286:01
611.56:296:01
711.56:296:01
811.56:296:00
911.56:296:00
1011.56:296:00
1111.56:295:59
1211.56:305:59
1311.56:305:59
1411.56:305:59
1511.56:305:58
1611.56:315:58
1711.56:315:58
1811.46:315:58
1911.46:315:58
2011.46:325:57
2111.46:325:57
2211.46:325:57
2311.46:325:57
2411.46:335:57
2511.46:335:57
2611.46:335:57
2711.46:335:57
2811.46:345:57
2911.46:345:56
3011.46:345:56
3111.46:355:56

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 4.96 kWh/m².

For context, solar energy here swings from a low near 4.88 kWh/m² to a high of 6.06 kWh/m² in September across the year — May's 4.96 kWh/m² sits near the bottom.

0246151015202531
Solar energy (kWh/m²)Level
15.0Bright
25.0Bright
35.0Bright
45.0Bright
55.0Bright
65.0Bright
75.0Bright
85.0Bright
95.0Bright
105.0Bright
115.0Bright
125.0Bright
135.0Bright
145.0Bright
155.0Bright
165.0Bright
175.0Bright
185.0Bright
194.9Bright
204.9Bright
214.9Bright
224.9Bright
234.9Bright
244.9Bright
254.9Bright
264.9Bright
274.9Bright
284.9Bright
294.9Bright
304.9Bright
314.9Bright
Planning a trip in May

Hazard calendar for Formoso do Araguaia

In seasonPeak

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

Formoso do Araguaia's monsoon runs November–April, 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 Formoso do Araguaia?

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

4.1
Sightseeing
3rd-best month of the year
7.1
Beach & pool
3rd-best month of the year

May is a reasonable time to visit Formoso do Araguaia for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Formoso do Araguaia in May

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

In May, Formoso do Araguaia sees daytime highs around 33°C and nights near 23°C. Pack light clothes. Worth having: sun protection. About 5 days see rain.

light clothessun protection

UV index in Formoso do Araguaia in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 10 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Formoso do Araguaia peaks around February 14 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 22 at about 8 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highExtremeFeb 14UV 15Jun 22UV 8
UV index (midday)Level
Jan14Extreme
Feb15Extreme
Mar14Extreme
Apr12Extreme
May10Very high
Jun8Very high
Jul9Very high
Aug10Very high
Sep12Extreme
Oct10Extreme
Nov12Extreme
Dec12Extreme

Air quality in Formoso do Araguaia 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 Formoso do Araguaia is worst in September — around 27 µg/m³ PM2.5 (moderate), about 6.9× the cleanest month (June, 4 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodSep 2327 µg/m³Jun 224 µg/m³
PM2.5 (µg/m³)Level
Jan9Good
Feb8Good
Mar9Good
Apr8Good
May8Good
Jun4Good
Jul5Good
Aug8Good
Sep27Moderate
Oct26Moderate
Nov11Good
Dec9Good
Location & terrain

Where is Formoso do Araguaia?

Formoso do Araguaia sits at 11.8°S, 49.5°W, 247 m above sea level, in Brazil. The nearest listed city is Gurupi, 51 km away.

Topography around Formoso do Araguaia

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

Within 3 km, the terrain around Formoso do Araguaia has only modest variations in elevation — a maximum elevation change of 62 m around an average of 252 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 103 m; within 80 km, significant variations in elevation — a maximum elevation change of 398 m.

The land around Formoso do Araguaia is covered by grassland (42%) and trees (33%) within 3 km, grassland (44%) and trees (40%) within 16 km, and grassland (46%) and trees (43%) within 80 km.

3 km
62 m
16 km
103 m
80 km
398 m
treesshrubsgrasslandcroplandartificial surfaceswaterwetland
May weather nearby: Gurupi 51 km · Lagoa da Confusão 112 km · Porto Nacional 171 km · São Miguel do Araguaia 178 km · Porangatu 187 km · Paraíso do Tocantins 194 km · Palmas 224 km · Minaçu 240 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 Formoso do Araguaia (-11.7967°, -49.5289°, elevation 247 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).