Santana do Araguaia weather in September

In September, Santana do Araguaia sees average daytime highs of 35°C and overnight lows near 23°C, with 36 mm of rain across 4.8 wet days and about 11.9 hours of daylight. It is the 2nd-warmest and 9th-wettest month of the year here.

Highs ease over the month, from about 35°C in the first days to 34°C by the end. The sky is clear or mostly clear about 52% of the time in September, and the air most often feels muggy.

Daylight stretches from about 11 h 48 min at the start of September to 12 h 06 min by month's end. Set against the rest of the year, September is Santana do Araguaia's 4th-clearest and 4th-windiest month. For the whole year in context, see Santana do Araguaia's year-round climate.

Daytime high
35°
2nd warmest
Overnight low
23°
12th coldest
Rainfall
36 mm
4.8 wet days
Daylight
11 h 54 min
6:17 AM – 6:14 PM
Cloud cover
45%
4th clearest
Wind
7 km/h
4th windiest
Solar energy
5.99 kWh/m²
Travel score
3.0
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 35°C in the first days to 34°C by the end.

A typical September day in Santana do Araguaia reaches about 35°C in the afternoon and slips back to 23°C overnight — a 12°C spread between the day's warmth and the night's chill. On most days the high lands between 32°C and 37°C. Set against its neighbours, September runs on par with August and about 2°C warmer than October.

20°25°30°35°40°151015202530
Avg high (°C)Avg low (°C)
13523
23523
33523
43523
53523
63523
73523
83523
93523
103523
113523
123523
133523
143523
153523
163523
173523
183523
193523
203523
213423
223423
233423
243423
253423
263423
273423
283423
293423
303423

How September really feels in Santana do Araguaia

Once humidity and wind are folded in, September averages 30 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
30
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

The story in September is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Santana do Araguaia weather by month

How September compares with the rest of the year at a glance. September is the 2nd-warmest and 9th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan30° / 22°31628.412.52.8
Feb30° / 22°27826.112.32.8
Mar30° / 23°29328.612.12.8
Apr31° / 23°21122.611.83.2
May32° / 22°8010.911.64.1
Jun33° / 22°51.111.54.6
Jul34° / 21°10.211.54.3
Aug35° / 22°40.811.73.3
Sep35° / 23°364.811.93.0
Oct32° / 23°13016.512.23.1
Nov31° / 23°2262412.42.9
Dec30° / 23°27426.912.52.9

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 52% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 16% of September, with mostly cloudy or overcast conditions the remaining 32%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
17921
27822
37723
47723
57624
67624
77525
87525
97426
107426
117327
127327
137129
147129
157030
166931
176832
186733
196634
206535
216535
226436
236337
246139
256139
265941
275842
285743
295644
305545

Chance of precipitation in September

Any precipitation

Santana do Araguaia gets around 36 mm of rain over 4.8 wet days in September. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 17% and peaks near 36% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%50%151015202530
Rain chance (%)
15
26
36
46
57
67
78
88
99
109
1110
1211
1312
1413
1514
1615
1716
1817
1919
2020
2122
2223
2325
2426
2528
2630
2731
2833
2934
3036

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the muggy band about 33% of days. Sticky, muggy-or-worse air turns up on roughly 67% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
12213233120
22203233130
32193233140
42193233150
52183133160
62173133160
72163133170
82153133180
92153133190
102143033200
112133033210
122122934230
132112834240
142102735260
15292635270
16282535290
17282336310
18272136330
19262036361
20261836381
21151636411
22151435441
23141234471
24141133502
25131032522
2603930562
2702829583
2802728603
2901626643
3001625653

Wind in September

Winds average 7 km/h in September.

Across September, daily wind ranges from about 6 km/h on the calmest days to 7 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
17calm
27calm
37calm
47calm
57calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
197calm
206calm
216calm
226calm
236calm
246calm
256calm
266calm
276calm
286calm
296calm
306calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 11 h 48 min at the start of September to 12 h 06 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 18 minutes over September. Sunrise moves from 6:27 AM to 6:09 AM, and sunset from 6:16 PM to 6:13 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.86:276:16
211.86:266:16
311.86:256:16
411.86:256:15
511.96:246:15
611.96:246:15
711.96:236:15
811.96:226:15
911.96:226:15
1011.96:216:15
1111.96:206:15
1211.96:206:15
1311.96:196:15
1411.96:196:14
1511.96:186:14
1611.96:176:14
1712.06:176:14
1812.06:166:14
1912.06:156:14
2012.06:156:14
2112.06:146:14
2212.06:136:14
2312.06:136:13
2412.06:126:13
2512.06:126:13
2612.06:116:13
2712.06:106:13
2812.16:106:13
2912.16:096:13
3012.16:096:13

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.99 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 4.68 kWh/m² to a high of 5.99 kWh/m² in September across the year — September's 5.99 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
15.9Bright
25.9Bright
35.9Bright
46.0Bright
56.0Bright
66.0Bright
76.0Bright
86.0Bright
96.0Intense
106.0Intense
116.0Intense
126.0Intense
136.0Intense
146.0Intense
156.0Intense
166.0Intense
176.0Intense
186.0Intense
196.0Intense
206.0Bright
216.0Bright
226.0Bright
236.0Bright
246.0Bright
256.0Bright
266.0Bright
276.0Bright
286.0Bright
296.0Bright
306.0Bright
Planning a trip in September

Hazard calendar for Santana do Araguaia

In seasonPeak

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

Santana do Araguaia'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 September a good time to visit Santana do Araguaia?

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

3.0
Sightseeing
7th-best month of the year
6.4
Beach & pool
5th-best month of the year

September is a weaker month for outdoor sightseeing in Santana do Araguaia. The water and warmth also suit a beach or pool day.

What to pack for Santana do Araguaia in September

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

In September, Santana do Araguaia sees daytime highs around 35°C and nights near 23°C. Pack light clothes. Worth having: sun protection. About 5 days see rain.

light clothessun protection

UV index in Santana do Araguaia in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September 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 Santana do Araguaia peaks around February 20 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 highExtremeFeb 20UV 15Jun 21UV 9
UV index (midday)Level
Jan14Extreme
Feb15Extreme
Mar15Extreme
Apr13Extreme
May10Extreme
Jun9Very high
Jul9Very high
Aug10Very high
Sep11Extreme
Oct10Extreme
Nov12Extreme
Dec11Extreme

Air quality in Santana do Araguaia in September

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where September falls, not just the annual average.

Air quality in Santana do Araguaia is worst in September — around 128 µg/m³ PM2.5 (unhealthy), about 11.2× the cleanest month (February, 11 µg/m³).

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

0306090120JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateUnhealthyModerateSep 16117 µg/m³Feb 1212 µg/m³
PM2.5 (µg/m³)Level
Jan12Good
Feb11Good
Mar13Moderate
Apr12Moderate
May14Moderate
Jun16Moderate
Jul15Moderate
Aug44Poor
Sep128Unhealthy
Oct34Moderate
Nov19Moderate
Dec16Moderate
Location & terrain

Where is Santana do Araguaia?

Santana do Araguaia sits at 9.3°S, 50.4°W, 178 m above sea level, in Brazil. The nearest listed city is Santa Maria das Barreiras, 87 km away.

Topography around Santana do Araguaia

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

Within 3 km, the terrain around Santana do Araguaia has only modest variations in elevation — a maximum elevation change of 34 m around an average of 174 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 75 m; within 80 km, significant variations in elevation — a maximum elevation change of 574 m.

The land around Santana do Araguaia is covered by grassland (54%) within 3 km, grassland (61%) and trees (24%) within 16 km, and grassland (47%) and trees (45%) within 80 km.

3 km
34 m
16 km
75 m
80 km
574 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Santa Maria das Barreiras 87 km · Vila Rica 113 km · Redenção 149 km · Conceição do Araguaia 168 km · Lagoa da Confusão 181 km · Paraíso do Tocantins 188 km · Confresa 197 km · Guaraí 210 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 Santana do Araguaia (-9.335°, -50.35°, elevation 178 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).