Ulianópolis weather in August

In August, Ulianópolis sees average daytime highs of 35°C and overnight lows near 22°C, with 6 mm of rain across 1.1 wet days and about 11.9 hours of daylight. It is the 2nd-warmest and 12th-wettest month of the year here.

Day-to-day highs hold fairly steady near 35°C through the month. The sky is clear or mostly clear about 63% of the time in August, and the air most often feels muggy.

Daylight stretches from about 11 h 48 min at the start of August to 11 h 54 min by month's end. Set against the rest of the year, August is Ulianópolis's 1st-clearest and 2nd-windiest month. For the whole year in context, see Ulianópolis's year-round climate.

Daytime high
35°
2nd warmest
Overnight low
22°
3rd coldest
Rainfall
6 mm
1.1 wet days
Daylight
11 h 54 min
6:18 AM – 6:10 PM
Cloud cover
37%
1st clearest
Wind
9 km/h
2nd windiest
Solar energy
5.81 kWh/m²
Travel score
3.4
out of 10

Temperature in August

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 35°C through the month.

A typical August day in Ulianópolis reaches about 35°C in the afternoon and slips back to 22°C overnight — a 12°C spread between the day's warmth and the night's chill. On most days the high lands between 33°C and 36°C. Set against its neighbours, August runs about 1°C warmer than July and on par with September.

20°25°30°35°40°151015202531
Avg high (°C)Avg low (°C)
13422
23422
33422
43422
53422
63422
73522
83522
93522
103522
113522
123522
133522
143522
153522
163522
173522
183522
193523
203523
213523
223523
233523
243523
253523
263523
273523
283523
293523
303523
313523

How August really feels in Ulianópolis

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.

Ulianópolis weather by month

How August compares with the rest of the year at a glance. August is the 2nd-warmest and 12th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan31° / 23°23925.812.22.7
Feb30° / 23°27325.712.12.7
Mar30° / 23°34829.2122.6
Apr30° / 23°2472711.92.7
May31° / 23°13119.611.83.4
Jun32° / 22°327.411.84.3
Jul33° / 22°163.611.83.9
Aug35° / 22°61.111.93.4
Sep35° / 23°112123.2
Oct35° / 24°255.612.13.0
Nov34° / 24°6710.212.23.0
Dec33° / 23°12916.812.23.0

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 63% of the time in August, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 25% of August, with mostly cloudy or overcast conditions the remaining 11%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
18911
28911
39010
49010
59010
69010
78911
88911
98911
108911
118911
128812
138812
148812
158812
168812
178911
188911
198911
208911
218911
228911
238911
248812
258911
268911
278911
288911
298911
308911
318812

Chance of precipitation in August

Any precipitation

Ulianópolis gets around 6 mm of rain over 1.1 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 3% and peaks near 4% on the wettest days.

0%10%20%30%151015202531
Rain chance (%)
14
24
34
44
54
64
73
84
94
104
114
124
134
143
153
163
173
183
193
203
213
223
233
243
253
263
273
283
294
304
314

Humidity in August

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, August lands in the muggy band about 49% of days. Sticky, muggy-or-worse air turns up on roughly 83% of them.

0%25%50%75%100%151015202531
Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
13224728
23224728
33214729
42214729
52204730
62204830
72194831
82194832
92184832
102184832
112184833
122184833
132174833
142174833
152174833
162164833
172164933
183154933
193155033
202145133
212135134
222125135
232115235
242105236
25295237
26285238
27175339
28165340
29165340
30155341
31145441

Wind in August

Winds average 9 km/h in August.

Across August, daily wind ranges from about 9 km/h on the calmest days to 9 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
19calm
29calm
39calm
49calm
59calm
69calm
79calm
89calm
99calm
109calm
119calm
129calm
139calm
149calm
159calm
169calm
179calm
189calm
199calm
209calm
219calm
229calm
239calm
249calm
259calm
269calm
279calm
289calm
299calm
309calm
319calm

Sunrise & sunset in August

DaylightNight

Daylight runs from about 11 h 48 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 6 minutes over August. Sunrise moves from 6:21 AM to 6:12 AM, and sunset from 6:11 PM to 6:08 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.86:216:11
211.86:216:11
311.86:216:11
411.86:216:11
511.86:206:11
611.86:206:11
711.96:206:11
811.96:206:11
911.96:206:11
1011.96:196:11
1111.96:196:11
1211.96:196:11
1311.96:196:11
1411.96:186:11
1511.96:186:10
1611.96:186:10
1711.96:176:10
1811.96:176:10
1911.96:176:10
2011.96:176:10
2111.96:166:10
2211.96:166:10
2311.96:156:09
2411.96:156:09
2511.96:156:09
2611.96:146:09
2711.96:146:09
2811.96:146:08
2911.96:136:08
3011.96:136:08
3111.96:126:08

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 5.81 kWh/m².

For context, solar energy here swings from a low near 4.18 kWh/m² to a high of 6.15 kWh/m² in October across the year — August's 5.81 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.6Bright
25.7Bright
35.7Bright
45.7Bright
55.7Bright
65.7Bright
75.7Bright
85.7Bright
95.7Bright
105.8Bright
115.8Bright
125.8Bright
135.8Bright
145.8Bright
155.8Bright
165.8Bright
175.8Bright
185.8Bright
195.8Bright
205.9Bright
215.9Bright
225.9Bright
235.9Bright
245.9Bright
255.9Bright
265.9Bright
275.9Bright
285.9Bright
296.0Bright
306.0Bright
316.0Bright
Planning a trip in August

Hazard calendar for Ulianópolis

In seasonPeak

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

Ulianópolis's monsoon runs January–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 Ulianópolis?

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

3.4
Sightseeing
3rd-best month of the year
7.1
Beach & pool
2nd-best month of the year

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

What to pack for Ulianópolis in August

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

In August, Ulianópolis sees daytime highs around 35°C and nights near 22°C. Pack light clothes. Worth having: sun protection.

light clothessun protection

UV index in Ulianópolis 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 Ulianópolis peaks around March 15 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 17 at about 10 (extreme).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeMar 15UV 15Jul 17UV 10
UV index (midday)Level
Jan13Extreme
Feb14Extreme
Mar15Extreme
Apr14Extreme
May11Extreme
Jun10Extreme
Jul10Extreme
Aug10Extreme
Sep12Extreme
Oct12Extreme
Nov11Extreme
Dec10Extreme

Air quality in Ulianópolis 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 Ulianópolis is worst in November — around 33 µg/m³ PM2.5 (moderate), about 3.7× the cleanest month (June, 9 µg/m³).

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModerateNov 2033 µg/m³Jun 139 µg/m³
PM2.5 (µg/m³)Level
Jan16Moderate
Feb16Moderate
Mar15Moderate
Apr12Moderate
May10Good
Jun9Good
Jul11Good
Aug13Moderate
Sep16Moderate
Oct21Moderate
Nov33Moderate
Dec30Moderate
Location & terrain

Where is Ulianópolis?

Ulianópolis sits at 3.7°S, 47.5°W, 119 m above sea level, in Brazil. The nearest listed city is Dom Eliseu, 60 km away.

Topography around Ulianópolis

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

Within 3 km, the terrain around Ulianópolis has only modest variations in elevation — a maximum elevation change of 47 m around an average of 113 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 152 m; within 80 km, significant variations in elevation — a maximum elevation change of 304 m.

The land around Ulianópolis is covered by grassland (62%) and trees (26%) within 3 km, grassland (51%) and trees (48%) within 16 km, and trees (65%) and grassland (33%) within 80 km.

3 km
47 m
16 km
152 m
80 km
304 m
treesgrasslandcroplandartificial surfacesbare terrain
August weather nearby: Dom Eliseu 60 km · Itinga do Maranhão 79 km · Paragominas 84 km · Bom Jesus das Selvas 109 km · Rondon do Pará 131 km · Ipixuna do Pará 132 km · Buriticupu 132 km · Açailândia 134 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 Ulianópolis (-3.7419°, -47.4947°, elevation 119 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).