Santa Maria das Barreiras weather in October

In October, Santa Maria das Barreiras sees average daytime highs of 33°C and overnight lows near 24°C, with 129 mm of rain across 16.7 wet days and about 12.2 hours of daylight. It is the 5th-warmest and 7th-wettest month of the year here.

Highs ease over the month, from about 33°C in the first days to 32°C by the end. The sky is clear or mostly clear about 23% of the time in October, and the air most often feels oppressive.

Daylight stretches from about 12 h 06 min at the start of October to 12 h 18 min by month's end. Set against the rest of the year, October is Santa Maria das Barreiras's 6th-clearest and 6th-windiest month. For the whole year in context, see Santa Maria das Barreiras's year-round climate.

Daytime high
33°
5th warmest
Overnight low
24°
12th coldest
Rainfall
129 mm
16.7 wet days
Daylight
12 h 12 min
5:58 AM – 6:10 PM
Cloud cover
66%
6th clearest
Wind
5 km/h
6th windiest
Solar energy
5.84 kWh/m²
Travel score
3.1
out of 10

Temperature in October

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 33°C in the first days to 32°C by the end.

A typical October day in Santa Maria das Barreiras reaches about 33°C in the afternoon and slips back to 24°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 29°C and 35°C. Set against its neighbours, October runs about 2°C cooler than September and about 2°C warmer than November.

20°25°30°35°40°151015202531
Avg high (°C)Avg low (°C)
13424
23324
33324
43324
53324
63324
73324
83324
93324
103324
113324
123324
133324
143324
153324
163324
173324
183224
193224
203224
213224
223224
233224
243223
253223
263223
273223
283223
293223
303223
313223

How October really feels in Santa Maria das Barreiras

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.

Santa Maria das Barreiras weather by month

How October compares with the rest of the year at a glance. October is the 5th-warmest and 7th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan30° / 23°31128.412.52.7
Feb30° / 23°28425.812.32.7
Mar30° / 23°28528.312.12.7
Apr31° / 23°19421.911.83.1
May32° / 23°7411.411.63.9
Jun33° / 22°51.111.54.4
Jul34° / 22°10.411.54.0
Aug35° / 23°4111.73.2
Sep35° / 24°375.611.93.0
Oct33° / 24°12916.712.23.1
Nov31° / 23°21622.812.42.9
Dec31° / 23°25426.112.52.8

Cloud cover in October

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 23% of the time in October.

Beyond those clear spells, partly cloudy skies cover about 17% of October, with mostly cloudy or overcast conditions the remaining 60%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15446
25347
35248
45248
55149
65050
75050
84951
94852
104852
114654
124555
134456
144456
154258
164159
174060
183961
193664
203664
213565
223466
233169
243169
253070
262872
272872
282872
292773
302773
312674

Chance of precipitation in October

Any precipitation

Santa Maria das Barreiras gets around 129 mm of rain over 16.7 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 53% and peaks near 70% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%151015202531
Rain chance (%)
139
239
340
441
541
642
742
843
944
1044
1145
1246
1347
1448
1550
1651
1753
1854
1956
2058
2160
2261
2363
2465
2566
2667
2768
2869
2969
3069
3170

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 81% of days. Sticky, muggy-or-worse air turns up on roughly 99% of them.

0%25%50%75%100%151015202531
Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
11421704
21320724
30319744
40219754
50218755
60217765
70217765
80216775
90115795
100115795
110114805
120114796
130113806
140112816
150111826
160111817
170110827
18019837
19018838
20017848
21016849
22005869
23005869
240048610
250038710
260038611
270028711
280028612
290028612
300018613
310018613

Wind in October

Winds average 5 km/h in October.

Across October, daily wind ranges from about 5 km/h on the calmest days to 6 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
16calm
26calm
36calm
46calm
56calm
66calm
76calm
86calm
96calm
106calm
116calm
126calm
136calm
145calm
155calm
165calm
175calm
185calm
195calm
205calm
215calm
225calm
235calm
245calm
255calm
265calm
275calm
285calm
295calm
305calm
315calm

Sunrise & sunset in October

DaylightNight

Daylight runs from about 12 h 06 min at the start of October to 12 h 18 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 12 minutes over October. Sunrise moves from 6:06 AM to 5:53 AM, and sunset from 6:10 PM to 6:12 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.16:066:10
212.16:056:10
312.16:046:10
412.16:046:10
512.16:036:10
612.16:036:10
712.16:026:10
812.16:026:10
912.16:016:10
1012.26:016:10
1112.26:006:10
1212.26:006:10
1312.25:596:10
1412.25:596:10
1512.25:586:10
1612.25:586:10
1712.25:576:10
1812.25:576:10
1912.25:576:10
2012.25:566:10
2112.25:566:10
2212.25:566:10
2312.35:556:10
2412.35:556:11
2512.35:556:11
2612.35:546:11
2712.35:546:11
2812.35:546:11
2912.35:536:11
3012.35:536:12
3112.35:536:12

Solar energy in October

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in October, about 5.84 kWh/m².

For context, solar energy here swings from a low near 4.68 kWh/m² to a high of 5.98 kWh/m² in September across the year — October's 5.84 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.9Bright
25.9Bright
36.0Bright
46.0Bright
56.0Bright
66.0Bright
76.0Bright
86.0Bright
96.0Bright
105.9Bright
115.9Bright
125.9Bright
135.9Bright
145.9Bright
155.9Bright
165.9Bright
175.9Bright
185.8Bright
195.8Bright
205.8Bright
215.8Bright
225.8Bright
235.7Bright
245.7Bright
255.7Bright
265.7Bright
275.7Bright
285.6Bright
295.6Bright
305.6Bright
315.6Bright
Planning a trip in October

Hazard calendar for Santa Maria das Barreiras

In seasonPeak

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

Santa Maria das Barreiras'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 October a good time to visit Santa Maria das Barreiras?

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

3.1
Sightseeing
5th-best month of the year
5.3
Beach & pool
6th-best month of the year

October is a weaker month for outdoor sightseeing in Santa Maria das Barreiras.

What to pack for Santa Maria das Barreiras in October

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

In October, Santa Maria das Barreiras sees daytime highs around 33°C and nights near 24°C. Pack light clothes and rain gear. Worth having: sun protection. About 17 days see rain.

light clothesrain gearsun protection

UV index in Santa Maria das Barreiras in October

LowModerateHighVery highExtreme

Clear-sky midday UV in October 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 Santa Maria das Barreiras peaks around February 21 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 21 at about 9 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highExtremeExtremeFeb 21UV 15Jun 21UV 9
UV index (midday)Level
Jan13Extreme
Feb15Extreme
Mar15Extreme
Apr13Extreme
May11Extreme
Jun9Very high
Jul9Very high
Aug10Extreme
Sep12Extreme
Oct10Very high
Nov12Extreme
Dec11Extreme

Air quality in Santa Maria das Barreiras 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 Santa Maria das Barreiras is worst in September — around 81 µg/m³ PM2.5 (unhealthy), about 7.2× the cleanest month (February, 11 µg/m³).

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

020406080JanFebMarAprMayJunJulAugSepOctNovDecGoodGoodModerateUnhealthyModerateSep 1675 µg/m³Feb 1411 µg/m³
PM2.5 (µg/m³)Level
Jan12Good
Feb11Good
Mar12Moderate
Apr12Good
May13Moderate
Jun14Moderate
Jul14Moderate
Aug34Moderate
Sep81Unhealthy
Oct32Moderate
Nov18Moderate
Dec16Moderate
Location & terrain

Where is Santa Maria das Barreiras?

Santa Maria das Barreiras sits at 8.9°S, 49.7°W, 165 m above sea level, in Brazil. The nearest listed city is Conceição do Araguaia, 83 km away.

Topography around Santa Maria das Barreiras

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Santa Maria das Barreiras.

Within 3 km, the terrain around Santa Maria das Barreiras has only modest variations in elevation — a maximum elevation change of 21 m around an average of 158 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 293 m; within 80 km, significant variations in elevation — a maximum elevation change of 368 m.

The land around Santa Maria das Barreiras is covered by trees (34%), water (31%) and grassland (24%) within 3 km, trees (53%) and grassland (33%) within 16 km, and grassland (52%) and trees (40%) within 80 km.

3 km
21 m
16 km
293 m
80 km
368 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
October weather nearby: Conceição do Araguaia 83 km · Santana do Araguaia 87 km · Redenção 100 km · Guaraí 132 km · Floresta do Araguaia 147 km · Colinas do Tocantins 163 km · Miracema do Tocantins 164 km · Paraíso do Tocantins 172 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 Santa Maria das Barreiras (-8.8717°, -49.7128°, elevation 165 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).