Formoso do Araguaia weather in August

In August, Formoso do Araguaia sees average daytime highs of 35°C and overnight lows near 23°C, with 1 mm of rain across 0.3 wet days and about 11.6 hours of daylight. It is the 2nd-warmest and 11th-wettest month of the year here.

Highs climb over the month, from about 34°C in the first days to 36°C by the end. The sky is clear or mostly clear about 70% of the time in August, and the air most often feels comfortable.

Daylight stretches from about 11 h 30 min at the start of August to 11 h 48 min by month's end. Set against the rest of the year, August is Formoso do Araguaia's 2nd-clearest and 1st-windiest month. For the whole year in context, see Formoso do Araguaia's year-round climate.

Daytime high
35°
2nd warmest
Overnight low
23°
4th coldest
Rainfall
1 mm
0.3 wet days
Daylight
11 h 36 min
6:34 AM – 6:10 PM
Cloud cover
29%
2nd clearest
Wind
10 km/h
1st windiest
Solar energy
5.72 kWh/m²
Travel score
3.2
out of 10

Temperature in August

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 34°C in the first days to 36°C by the end.

A typical August day in Formoso do Araguaia reaches about 35°C in the afternoon and slips back to 23°C overnight — a 13°C spread between the day's warmth and the night's chill. On most days the high lands between 33°C and 37°C. Set against its neighbours, August runs about 2°C warmer than July and on par with September.

15°20°25°30°35°40°151015202531
Avg high (°C)Avg low (°C)
13422
23422
33422
43422
53522
63522
73522
83522
93522
103522
113522
123522
133522
143522
153523
163523
173523
183523
193523
203523
213623
223623
233623
243623
253623
263623
273623
283623
293624
303624
313624

How August really feels in Formoso do Araguaia

Once humidity and wind are folded in, August 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 August is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Formoso do Araguaia weather by month

How August compares with the rest of the year at a glance. August is the 2nd-warmest and 11th-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 August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 70% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 15% of August, with mostly cloudy or overcast conditions the remaining 15%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
18911
28812
38812
48812
58713
68614
78614
88614
98515
108515
118515
128416
138416
148416
158416
168416
178416
188416
198416
208416
218416
228416
238416
248416
258416
268416
278416
288416
298416
308317
318218

Chance of precipitation in August

Any precipitation

Formoso do Araguaia gets around 1 mm of rain over 0.3 wet days in August. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 1% and peaks near 3% on the wettest days.

0%10%20%30%151015202531
Rain chance (%)
10
20
30
40
50
60
71
81
91
101
111
121
131
141
151
161
171
181
191
201
211
221
231
241
252
262
272
282
292
303
313

Humidity in August

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, August lands in the comfortable band about 43% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
134511410
235511310
335521210
435521210
536511210
636521110
736511120
837501120
937491120
1038481120
1138471130
1239461230
1340451230
1440441230
1541431230
1641421340
1741421340
1841411340
1941411440
2041401440
2141391540
2241391650
2341381650
2440371750
2540371760
2640361860
2740351870
2840341980
2939321981
3039311991
31393020101

Wind in August

Winds average 10 km/h in August, the windiest month of the year.

Across August, daily wind ranges from about 10 km/h on the calmest days to 10 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
110calm
210calm
310calm
410calm
510calm
610calm
710calm
810calm
910calm
1010calm
1110calm
1210calm
1310calm
1410calm
1510calm
1610calm
1710calm
1810calm
1910calm
2010calm
2110calm
2210calm
2310calm
2410calm
2510calm
2610calm
2710calm
2810calm
2910calm
3010calm
3110calm

Sunrise & sunset in August

DaylightNight

Daylight runs from about 11 h 30 min at the start of August to 11 h 48 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 18 minutes over August. Sunrise moves from 6:40 AM to 6:25 AM, and sunset from 6:08 PM to 6:11 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.56:406:08
211.56:406:09
311.56:396:09
411.56:396:09
511.56:396:09
611.56:386:09
711.56:386:09
811.56:386:10
911.56:376:10
1011.66:376:10
1111.66:366:10
1211.66:366:10
1311.66:356:10
1411.66:356:10
1511.66:356:10
1611.66:346:10
1711.66:346:10
1811.66:336:11
1911.66:326:11
2011.66:326:11
2111.76:316:11
2211.76:316:11
2311.76:306:11
2411.76:306:11
2511.76:296:11
2611.76:286:11
2711.76:286:11
2811.76:276:11
2911.76:276:11
3011.76:266:11
3111.86:256:11

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 5.72 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 — August's 5.72 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.5Bright
25.5Bright
35.5Bright
45.5Bright
55.5Bright
65.6Bright
75.6Bright
85.6Bright
95.6Bright
105.7Bright
115.7Bright
125.7Bright
135.7Bright
145.7Bright
155.7Bright
165.8Bright
175.8Bright
185.8Bright
195.8Bright
205.8Bright
215.8Bright
225.8Bright
235.8Bright
245.8Bright
255.8Bright
265.9Bright
275.9Bright
285.9Bright
295.9Bright
305.9Bright
315.9Bright
Planning a trip in August

Hazard calendar for Formoso do Araguaia

In seasonPeak

None of Formoso do Araguaia's seasonal hazards are active in August. 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 August a good time to visit Formoso do Araguaia?

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

3.2
Sightseeing
5th-best month of the year
6.9
Beach & pool
4th-best month of the year

August is a weaker month for outdoor sightseeing in Formoso do Araguaia. The water and warmth also suit a beach or pool day.

What to pack for Formoso do Araguaia in August

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

In August, Formoso do Araguaia sees daytime highs around 35°C and nights near 23°C. Pack light clothes. Worth having: sun protection.

light clothessun protection

UV index in Formoso do Araguaia in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August 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 August

GoodModeratePoorUnhealthyVery unhealthy

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