Tonantins weather in August

In August, Tonantins sees average daytime highs of 31°C and overnight lows near 23°C, with 136 mm of rain across 22.9 wet days and about 11.9 hours of daylight. It is the 4th-warmest and 12th-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 15% of the time in August, and the air most often feels oppressive.

Daylight stretches from about 11 h 54 min at the start of August to 11 h 54 min by month's end. Set against the rest of the year, August is Tonantins's 1st-clearest and 11th-windiest month. For the whole year in context, see Tonantins's year-round climate.

Daytime high
31°
4th warmest
Overnight low
23°
3rd coldest
Rainfall
136 mm
22.9 wet days
Daylight
11 h 54 min
6:38 AM – 6:32 PM
Cloud cover
64%
1st clearest
Wind
4 km/h
11th windiest
Solar energy
4.72 kWh/m²
Travel score
3.3
out of 10

Tonantins is human settlement in Brazil.

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

Temperature in August

Average highAverage lowShaded bands: 10–90% of days

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

A typical August day in Tonantins reaches about 31°C in the afternoon and slips back to 23°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 28°C and 33°C. Set against its neighbours, August runs about 1°C warmer than July and about 1°C cooler than September.

20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
13022
23022
33022
43022
53022
63022
73022
83022
93022
103022
113022
123022
133023
143023
153123
163123
173123
183123
193123
203123
213123
223123
233123
243123
253123
263123
273123
283123
293123
303123
313123

How August really feels in Tonantins

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.

Tonantins weather by month

How August compares with the rest of the year at a glance. August is the 4th-warmest and 12th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan30° / 23°27627.612.12.8
Feb30° / 23°26925.312.12.7
Mar30° / 23°32128.5122.6
Apr30° / 23°32828.311.92.7
May29° / 23°31729.111.92.8
Jun29° / 23°21526.311.83.2
Jul30° / 22°16825.411.93.4
Aug31° / 23°13622.911.93.3
Sep31° / 23°14823.4122.9
Oct31° / 23°18525.412.12.7
Nov31° / 23°2102612.12.6
Dec31° / 23°25828.912.22.6

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 15% of the time in August, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 27% of August, with mostly cloudy or overcast conditions the remaining 58%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14753
24753
34753
44753
54654
64654
74555
84555
94456
104357
114357
124258
134159
144159
154159
164060
174060
184060
194060
204060
213961
223961
233961
244060
254060
263961
273961
283961
293961
303763
313763

Chance of precipitation in August

Any precipitation

Tonantins gets around 136 mm of rain over 22.9 wet days in August, the driest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 75% and peaks near 77% on the wettest days.

0%20%40%60%80%151015202531
Rain chance (%)
173
272
372
472
572
672
772
872
973
1073
1174
1274
1375
1475
1575
1675
1776
1876
1976
2076
2176
2276
2376
2476
2577
2677
2777
2877
2977
3077
3177

Humidity in August

DryComfortableHumidMuggyOppressiveMiserable

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

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

0%25%50%75%100%151015202531
Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1127225
2127126
3127126
4027127
5027028
6027028
7026929
8026929
9026830
10026830
11026731
12026731
13026731
14026632
15016633
16116533
17116434
18116335
19116236
20116137
21116038
22115939
23115840
24115741
25015841
26015742
27015643
28015643
29015544
30015445
31015445

Wind in August

Winds average 4 km/h in August.

Across August, 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 August

DaylightNight

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

Days grow by about 0 minutes over August. Sunrise moves from 6:41 AM to 6:33 AM, and sunset from 6:33 PM to 6:30 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.96:416:33
211.96:416:33
311.96:416:33
411.96:416:33
511.96:416:33
611.96:406:33
711.96:406:33
811.96:406:33
911.96:406:33
1011.96:406:33
1111.96:396:33
1211.96:396:33
1311.96:396:33
1411.96:396:33
1511.96:386:33
1611.96:386:32
1711.96:386:32
1811.96:386:32
1911.96:376:32
2011.96:376:32
2111.96:376:32
2211.96:366:31
2311.96:366:31
2411.96:366:31
2511.96:356:31
2611.96:356:31
2711.96:356:30
2811.96:346:30
2911.96:346:30
3011.96:336:30
3111.96:336:30

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 4.72 kWh/m².

For context, solar energy here swings from a low near 3.67 kWh/m² to a high of 5.18 kWh/m² in October across the year — August's 4.72 kWh/m² falls in the middle.

024151015202531
Solar energy (kWh/m²)Level
14.5Bright
24.5Bright
34.5Bright
44.5Bright
54.5Bright
64.6Bright
74.6Bright
84.6Bright
94.6Bright
104.6Bright
114.6Bright
124.6Bright
134.6Bright
144.6Bright
154.7Bright
164.7Bright
174.7Bright
184.7Bright
194.7Bright
204.8Bright
214.8Bright
224.8Bright
234.8Bright
244.8Bright
254.9Bright
264.9Bright
274.9Bright
284.9Bright
294.9Bright
305.0Bright
315.0Bright
Planning a trip in August

Is August a good time to visit Tonantins?

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

3.3
Sightseeing
2nd-best month of the year
4.7
Beach & pool
1st-best month of the year

August is a weaker month for outdoor sightseeing in Tonantins.

What to pack for Tonantins in August

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

In August, Tonantins sees daytime highs around 31°C and nights near 23°C. Pack light clothes and rain gear. Worth having: sun protection. About 23 days see rain.

light clothesrain gearsun protection

UV index in Tonantins 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 Tonantins peaks around February 22 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near August 16 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 highExtremeFeb 22UV 15Aug 16UV 10
UV index (midday)Level
Jan15Extreme
Feb15Extreme
Mar15Extreme
Apr14Extreme
May13Extreme
Jun11Extreme
Jul10Very high
Aug10Very high
Sep10Very high
Oct12Extreme
Nov13Extreme
Dec12Extreme

Air quality in Tonantins 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 Tonantins is worst in August — around 18 µg/m³ PM2.5 (moderate), about 1.8× the cleanest month (June, 10 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModerateAug 2217 µg/m³Jun 1110 µg/m³
PM2.5 (µg/m³)Level
Jan15Moderate
Feb15Moderate
Mar16Moderate
Apr14Moderate
May10Good
Jun10Good
Jul11Good
Aug18Moderate
Sep17Moderate
Oct13Moderate
Nov13Moderate
Dec13Moderate
Location & terrain

Where is Tonantins?

Tonantins sits at 2.9°S, 67.8°W, 55 m above sea level, in Brazil. The nearest listed city is Santo Antônio do Içá, 30 km away.

CarauariMaraãLeticiaTabatingaBenjamin Constant

Topography around Tonantins

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

Within 3 km, the terrain around Tonantins has only modest variations in elevation — a maximum elevation change of 69 m around an average of 67 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 80 m; within 80 km, only modest variations in elevation — a maximum elevation change of 92 m.

The land around Tonantins is covered by trees (73%) within 3 km, trees (86%) within 16 km, and trees (95%) within 80 km.

3 km
69 m
16 km
80 m
80 km
92 m
treesgrasslandartificial surfaceswater
August weather nearby: Santo Antônio do Içá 30 km · São Paulo de Olivença 131 km · Fonte Boa 194 km · Carauari 245 km · Maraã 272 km · Leticia 280 km · Tabatinga 281 km · Benjamin Constant 299 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 Tonantins (-2.8731°, -67.8022°, elevation 55 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).