Alto Araguaia weather in September

In September, Alto Araguaia sees average daytime highs of 32°C and overnight lows near 19°C, with 52 mm of rain across 7.7 wet days and about 11.9 hours of daylight. It is the 1st-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 50% of the time in September, and the air most often feels dry.

Daylight stretches from about 11 h 42 min at the start of September to 12 h 06 min by month's end. Set against the rest of the year, September is Alto Araguaia's 4th-clearest and 3rd-windiest month. For the whole year in context, see Alto Araguaia's year-round climate.

Daytime high
32°
1st warmest
Overnight low
19°
5th coldest
Rainfall
52 mm
7.7 wet days
Daylight
11 h 54 min
6:30 AM – 6:24 PM
Cloud cover
43%
4th clearest
Wind
9 km/h
3rd windiest
Solar energy
5.83 kWh/m²
Travel score
4.5
out of 10

Alto Araguaia is human settlement in Brazil.

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

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

A typical September day in Alto Araguaia reaches about 32°C in the afternoon and slips back to 19°C overnight — a 13°C spread between the day's warmth and the night's chill. On most days the high lands between 27°C and 35°C. Set against its neighbours, September runs about 1°C warmer than August and about 1°C warmer than October.

15°20°25°30°35°40°151015202530
Avg high (°C)Avg low (°C)
13218
23218
33218
43218
53218
63219
73219
83219
93219
103219
113219
123219
133219
143219
153219
163219
173219
183219
193220
203220
213220
223220
233220
243220
253220
263220
273220
283120
293120
303120

How September really feels in Alto Araguaia

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

September sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Alto Araguaia weather by month

How September compares with the rest of the year at a glance. September is the 1st-warmest and 8th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan29° / 21°27025.712.93.5
Feb29° / 21°22222.512.63.6
Mar29° / 20°19223.512.13.7
Apr29° / 19°7412.411.65.1
May28° / 17°264.311.26.7
Jun28° / 16°111.5117.4
Jul29° / 15°60.911.17.4
Aug31° / 17°91.711.45.9
Sep32° / 19°527.711.94.5
Oct31° / 20°12517.812.43.7
Nov29° / 20°19222.712.83.6
Dec29° / 20°24926.2133.5

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 50% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 19% of September, with mostly cloudy or overcast conditions the remaining 31%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
17822
27822
37723
47723
57723
67624
77624
87525
97426
107426
117327
127228
137129
147129
157030
166931
176931
186832
196832
206733
216535
226436
236436
246337
256139
266040
275941
285941
295842
305743

Chance of precipitation in September

Any precipitation

Alto Araguaia gets around 52 mm of rain over 7.7 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 26% and peaks near 45% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
113
214
315
415
516
616
717
818
918
1019
1120
1221
1321
1422
1523
1624
1725
1826
1928
2029
2130
2232
2334
2435
2537
2639
2741
2842
2944
3045

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the dry band about 30% of days. Sticky, muggy-or-worse air turns up on roughly 22% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
15323168
25223178
35123179
451221710
549221811
648221812
746231913
845231913
943232014
1041242115
1139242115
1237252216
1335252317
1432252418
1530252519
1628262620
1726262721
1824262822
1922252924
2020252925
2119243027
2217243029
2316233131
2415223133
2513203135
2612193137
2711183040
2811173042
2910162944
309162846

Wind in September

Winds average 9 km/h in September.

Across September, 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.

051015151015202530
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
238calm
248calm
258calm
268calm
278calm
288calm
298calm
308calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 11 h 42 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 24 minutes over September. Sunrise moves from 6:43 AM to 6:18 AM, and sunset from 6:22 PM to 6:26 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.76:436:22
211.76:426:22
311.76:416:23
411.76:406:23
511.76:406:23
611.76:396:23
711.86:386:23
811.86:376:23
911.86:366:23
1011.86:356:24
1111.86:346:24
1211.86:346:24
1311.96:336:24
1411.96:326:24
1511.96:316:24
1611.96:306:24
1711.96:296:24
1811.96:286:25
1912.06:276:25
2012.06:276:25
2112.06:266:25
2212.06:256:25
2312.06:246:25
2412.06:236:25
2512.16:226:26
2612.16:216:26
2712.16:216:26
2812.16:206:26
2912.16:196:26
3012.16:186:26

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.83 kWh/m².

For context, solar energy here swings from a low near 4.4 kWh/m² to a high of 5.98 kWh/m² in October across the year — September's 5.83 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
15.6Bright
25.6Bright
35.7Bright
45.7Bright
55.7Bright
65.7Bright
75.7Bright
85.7Bright
95.8Bright
105.8Bright
115.8Bright
125.8Bright
135.8Bright
145.8Bright
155.8Bright
165.8Bright
175.8Bright
185.8Bright
195.8Bright
205.8Bright
215.9Bright
225.9Bright
235.9Bright
245.9Bright
255.9Bright
265.9Bright
275.9Bright
285.9Bright
295.9Bright
306.0Bright
Planning a trip in September

Hazard calendar for Alto Araguaia

In seasonPeak

None of Alto 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.

Alto Araguaia's monsoon runs October–March, 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 Alto Araguaia?

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

4.5
Sightseeing
6th-best month of the year
7.0
Beach & pool
5th-best month of the year

September is a reasonable time to visit Alto Araguaia for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Alto Araguaia in September

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

In September, Alto Araguaia sees daytime highs around 32°C and nights near 19°C. Pack light clothes. Worth having: sun protection. About 8 days see rain.

light clothessun protection

UV index in Alto Araguaia in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September 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 Alto Araguaia peaks around January 20 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 22 at about 8 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highExtremeJan 20UV 15Jun 22UV 8
UV index (midday)Level
Jan16Extreme
Feb15Extreme
Mar14Extreme
Apr12Extreme
May9Very high
Jun8Very high
Jul8Very high
Aug9Very high
Sep10Extreme
Oct11Extreme
Nov14Extreme
Dec14Extreme

Air quality in Alto 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 Alto Araguaia is worst in September — around 25 µg/m³ PM2.5 (moderate), about 5.9× the cleanest month (June, 4 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodSep 1823 µg/m³Jun 194 µg/m³
PM2.5 (µg/m³)Level
Jan7Good
Feb7Good
Mar7Good
Apr6Good
May6Good
Jun4Good
Jul5Good
Aug8Good
Sep25Moderate
Oct16Moderate
Nov7Good
Dec7Good
Location & terrain

Where is Alto Araguaia?

Alto Araguaia sits at 17.3°S, 53.2°W, 672 m above sea level, in Brazil. The nearest listed city is Mineiros, 76 km away.

Topography around Alto Araguaia

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

Within 3 km, the terrain around Alto Araguaia has only modest variations in elevation — a maximum elevation change of 115 m around an average of 694 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 240 m; within 80 km, large variations in elevation — a maximum elevation change of 658 m.

The land around Alto Araguaia is covered by grassland (46%) and trees (29%) within 3 km, grassland (44%) and trees (35%) within 16 km, and trees (33%), grassland (33%) and cropland (25%) within 80 km.

3 km
115 m
16 km
240 m
80 km
658 m
treesshrubsgrasslandcroplandartificial surfaces
September weather nearby: Mineiros 76 km · Costa Rica 137 km · Pedra Preta 154 km · Caiapônia 155 km · Jataí 170 km · Chapadão do Sul 176 km · Rondonópolis 178 km · Aragarças 188 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 Alto Araguaia (-17.3147°, -53.2153°, elevation 672 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).