Ulianópolis weather in October

In October, Ulianópolis sees average daytime highs of 35°C and overnight lows near 24°C, with 25 mm of rain across 5.6 wet days and about 12.1 hours of daylight. It is the 3rd-warmest and 9th-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 31% of the time in October, and the air most often feels oppressive.

Daylight stretches from about 12 hours at the start of October to 12 h 06 min by month's end. Set against the rest of the year, October is Ulianópolis's 5th-clearest and 3rd-windiest month. For the whole year in context, see Ulianópolis's year-round climate.

Daytime high
35°
3rd warmest
Overnight low
24°
12th coldest
Rainfall
25 mm
5.6 wet days
Daylight
12 h 06 min
5:53 AM – 5:58 PM
Cloud cover
55%
5th clearest
Wind
9 km/h
3rd windiest
Solar energy
6.15 kWh/m²
Travel score
3.0
out of 10

Temperature in October

Average highAverage lowShaded bands: 10–90% of days

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

A typical October day in Ulianópolis reaches about 35°C in the afternoon and slips back to 24°C overnight — a 11°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, October runs on par with September and about 1°C warmer than November.

20°25°30°35°40°151015202531
Avg high (°C)Avg low (°C)
13524
23524
33524
43524
53524
63524
73524
83524
93524
103524
113524
123524
133524
143524
153524
163524
173524
183524
193524
203524
213524
223424
233424
243424
253424
263424
273424
283424
293424
303424
313424

How October really feels in Ulianópolis

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

Ulianópolis weather by month

How October compares with the rest of the year at a glance. October is the 3rd-warmest and 9th-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 October

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 31% of the time in October.

Beyond those clear spells, partly cloudy skies cover about 32% of October, with mostly cloudy or overcast conditions the remaining 37%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
17525
27327
37228
47228
57129
67030
76931
86931
96832
106733
116634
126535
136535
146436
156436
166436
176238
186238
196139
206139
216040
225941
235743
245743
255545
265545
275347
285347
295248
305149
314951

Chance of precipitation in October

Any precipitation

Ulianópolis gets around 25 mm of rain over 5.6 wet days in October. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 18% and peaks near 26% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%151015202531
Rain chance (%)
111
211
311
411
511
612
712
812
913
1014
1114
1215
1316
1417
1518
1618
1719
1820
1921
2021
2122
2223
2323
2424
2524
2624
2724
2825
2925
3025
3126

Humidity in October

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, October lands in the oppressive band about 55% of days. Sticky, muggy-or-worse air turns up on roughly 99% of them.

0%25%50%75%100%151015202531
Humid (%)Muggy (%)Oppressive (%)
115049
215049
305149
405149
505149
605149
705149
805149
905149
1005149
1105050
1214950
1314950
1414851
1514752
1614653
1714554
1814455
1914356
2014257
2114158
2224058
2323959
2423860
2523761
2623761
2723662
2823662
2923662
3013564
3113564

Wind in October

Winds average 9 km/h in October.

Across October, daily wind ranges from about 8 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
288calm
298calm
308calm
318calm

Sunrise & sunset in October

DaylightNight

Daylight runs from about 12 hours at the start of October to 12 h 06 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 6 minutes over October. Sunrise moves from 5:58 AM to 5:50 AM, and sunset from 6:00 PM to 5:57 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.05:586:00
212.05:586:00
312.05:576:00
412.05:575:59
512.05:565:59
612.05:565:59
712.15:565:59
812.15:555:59
912.15:555:58
1012.15:545:58
1112.15:545:58
1212.15:545:58
1312.15:535:58
1412.15:535:58
1512.15:535:58
1612.15:535:58
1712.15:525:57
1812.15:525:57
1912.15:525:57
2012.15:515:57
2112.15:515:57
2212.15:515:57
2312.15:515:57
2412.15:515:57
2512.15:505:57
2612.15:505:57
2712.15:505:57
2812.15:505:57
2912.15:505:57
3012.15:505:57
3112.15:505:57

Solar energy in October

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in October, about 6.15 kWh/m² — the sunniest month for solar.

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 — October's 6.15 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
16.2Intense
26.2Intense
36.2Intense
46.2Intense
56.2Intense
66.2Intense
76.2Intense
86.2Intense
96.2Intense
106.2Intense
116.2Intense
126.2Intense
136.2Intense
146.2Intense
156.1Intense
166.1Intense
176.1Intense
186.1Intense
196.1Intense
206.1Intense
216.1Intense
226.1Intense
236.1Intense
246.1Intense
256.1Intense
266.1Intense
276.0Intense
286.0Intense
296.0Intense
306.0Intense
316.0Intense
Planning a trip in October

Hazard calendar for Ulianópolis

In seasonPeak

None of Ulianópolis's seasonal hazards are active in October. 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 October a good time to visit Ulianópolis?

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

3.0
Sightseeing
6th-best month of the year
6.2
Beach & pool
5th-best month of the year

October 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 October

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

In October, Ulianópolis sees daytime highs around 35°C and nights near 24°C. Pack light clothes and sun protection. About 6 days see rain.

light clothessun protection

UV index in Ulianópolis in October

LowModerateHighVery highExtreme

Clear-sky midday UV in October peaks around 12 (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 October

GoodModeratePoorUnhealthyVery unhealthy

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