Santa Maria das Barreiras weather in May

In May, Santa Maria das Barreiras sees average daytime highs of 32°C and overnight lows near 23°C, with 74 mm of rain across 11.4 wet days and about 11.6 hours of daylight. It is the 6th-warmest and 8th-wettest month of the year here.

Day-to-day highs hold fairly steady near 32°C through the month. The sky is clear or mostly clear about 28% of the time in May, and the air most often feels oppressive.

Daylight stretches from about 11 h 42 min at the start of May to 11 h 30 min by month's end. Set against the rest of the year, May is Santa Maria das Barreiras's 5th-clearest and 5th-windiest month. For the whole year in context, see Santa Maria das Barreiras's year-round climate.

Daytime high
32°
6th warmest
Overnight low
23°
6th coldest
Rainfall
74 mm
11.4 wet days
Daylight
11 h 36 min
6:27 AM – 6:03 PM
Cloud cover
61%
5th clearest
Wind
5 km/h
5th windiest
Solar energy
4.78 kWh/m²
Travel score
3.9
out of 10

Temperature in May

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 32°C through the month.

A typical May day in Santa Maria das Barreiras reaches about 32°C in the afternoon and slips back to 23°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 30°C and 34°C. Set against its neighbours, May runs about 1°C warmer than April and about 1°C cooler than June.

20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
13123
23123
33123
43123
53223
63223
73223
83223
93223
103223
113223
123223
133223
143223
153223
163223
173223
183223
193223
203223
213223
223223
233223
243223
253223
263223
273223
283223
293223
303223
313223

How May really feels in Santa Maria das Barreiras

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

Santa Maria das Barreiras weather by month

How May compares with the rest of the year at a glance. May is the 6th-warmest and 8th-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 May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 28% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 20% of May, with mostly cloudy or overcast conditions the remaining 52%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13367
23466
33466
43664
53664
63862
73961
83961
94159
104357
114357
124555
134555
144753
154753
164951
174951
185050
195149
205248
215347
225347
235446
245545
255644
265743
275842
286040
296139
306337
316535

Chance of precipitation in May

Any precipitation

Santa Maria das Barreiras gets around 74 mm of rain over 11.4 wet days in May. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 36% and peaks near 56% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%151015202531
Rain chance (%)
156
255
354
452
551
650
748
847
945
1043
1142
1240
1339
1437
1536
1635
1734
1833
1932
2031
2129
2228
2327
2426
2525
2623
2722
2820
2919
3017
3116

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, May lands in the oppressive band about 75% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1037720
2037720
3037720
4037819
5037819
6037918
7047818
8047917
9057817
10057916
11067915
12077815
13077914
14087913
15097912
160107911
170117910
18012799
19014779
20015778
21017767
22018766
23020755
24122725
25124714
26126703
27128683
28130672
29232642
30234631
31337591

Wind in May

Winds average 5 km/h in May.

Across May, 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
15calm
25calm
35calm
45calm
55calm
65calm
75calm
85calm
95calm
105calm
115calm
125calm
135calm
145calm
155calm
165calm
176calm
186calm
196calm
206calm
216calm
226calm
236calm
246calm
256calm
266calm
276calm
286calm
296calm
306calm
316calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 11 h 42 min at the start of May to 11 h 30 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 12 minutes over May. Sunrise moves from 6:25 AM to 6:30 AM, and sunset from 6:07 PM to 6:02 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.76:256:07
211.76:256:06
311.76:256:06
411.76:266:06
511.76:266:05
611.76:266:05
711.76:266:05
811.66:266:05
911.66:266:04
1011.66:266:04
1111.66:266:04
1211.66:276:04
1311.66:276:04
1411.66:276:03
1511.66:276:03
1611.66:276:03
1711.66:276:03
1811.66:286:03
1911.66:286:03
2011.66:286:02
2111.66:286:02
2211.66:286:02
2311.66:296:02
2411.66:296:02
2511.56:296:02
2611.56:296:02
2711.56:306:02
2811.56:306:02
2911.56:306:02
3011.56:306:02
3111.56:306:02

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 4.78 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 — May's 4.78 kWh/m² sits near the bottom.

024151015202531
Solar energy (kWh/m²)Level
14.7Bright
24.7Bright
34.7Bright
44.7Bright
54.7Bright
64.7Bright
74.8Bright
84.8Bright
94.8Bright
104.8Bright
114.8Bright
124.8Bright
134.8Bright
144.8Bright
154.8Bright
164.8Bright
174.8Bright
184.8Bright
194.8Bright
204.8Bright
214.8Bright
224.8Bright
234.8Bright
244.8Bright
254.8Bright
264.8Bright
274.8Bright
284.8Bright
294.9Bright
304.9Bright
314.9Bright
Planning a trip in May

Hazard calendar for Santa Maria das Barreiras

In seasonPeak

None of Santa Maria das Barreiras's seasonal hazards are active in May. 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 May a good time to visit Santa Maria das Barreiras?

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

3.9
Sightseeing
3rd-best month of the year
6.3
Beach & pool
5th-best month of the year

May is a weaker month for outdoor sightseeing in Santa Maria das Barreiras. The water and warmth also suit a beach or pool day.

What to pack for Santa Maria das Barreiras in May

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

In May, Santa Maria das Barreiras sees daytime highs around 32°C and nights near 23°C. Pack light clothes. Worth having: rain gear and sun protection. About 11 days see rain.

light clothesrain gearsun protection

UV index in Santa Maria das Barreiras in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 11 (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 May

GoodModeratePoorUnhealthyVery unhealthy

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