São Geraldo do Araguaia weather in September

In September, São Geraldo do Araguaia sees average daytime highs of 34°C and overnight lows near 24°C, with 23 mm of rain across 4 wet days and about 12 hours of daylight. It is the 2nd-warmest and 9th-wettest month of the year here.

Day-to-day highs hold fairly steady near 34°C through the month. The sky is clear or mostly clear about 60% of the time in September, and the air most often feels oppressive.

Daylight stretches from about 11 h 54 min at the start of September to 12 hours by month's end. Set against the rest of the year, September is São Geraldo do Araguaia's 3rd-clearest and 4th-windiest month. For the whole year in context, see São Geraldo do Araguaia's year-round climate.

Daytime high
34°
2nd warmest
Overnight low
24°
11th coldest
Rainfall
23 mm
4 wet days
Daylight
12 hours
6:10 AM – 6:08 PM
Cloud cover
40%
3rd clearest
Wind
7 km/h
4th windiest
Solar energy
6.21 kWh/m²
Travel score
3.5
out of 10

São Geraldo do 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 34°C through the month.

A typical September day in São Geraldo do Araguaia reaches about 34°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 32°C and 36°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
23423
33423
43423
53423
63423
73423
83423
93423
103423
113424
123424
133424
143424
153424
163424
173424
183424
193424
203424
213424
223424
233424
243424
253424
263424
273424
283424
293324
303324

How September really feels in São Geraldo 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.

São Geraldo 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° / 23°26928.612.32.8
Feb30° / 23°27725.812.22.7
Mar30° / 23°28328.4122.7
Apr31° / 23°20023.811.93.0
May31° / 23°10114.111.73.9
Jun33° / 22°132.611.64.5
Jul33° / 22°5111.74.2
Aug34° / 23°5111.83.6
Sep34° / 24°234123.5
Oct33° / 24°7912.312.13.5
Nov31° / 23°16520.112.33.2
Dec30° / 23°21324.912.43.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 60% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 18% of September, with mostly cloudy or overcast conditions the remaining 22%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
18614
28614
38515
48515
58416
68416
78416
88317
98218
108218
118119
128119
138119
148020
158020
167822
177822
187723
197624
207525
217426
227426
237228
247228
257030
267030
276931
286832
296733
306634

Chance of precipitation in September

Any precipitation

São Geraldo do Araguaia gets around 23 mm of rain over 4 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 13% and peaks near 24% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%151015202530
Rain chance (%)
16
26
37
47
58
68
78
89
99
109
1110
1210
1310
1411
1511
1612
1713
1813
1914
2015
2116
2217
2318
2419
2520
2621
2722
2823
2923
3024

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the oppressive band about 45% of days. Sticky, muggy-or-worse air turns up on roughly 82% of them.

0%25%50%75%100%151015202530
Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
142647230
232647240
332646250
432645260
532644270
632543280
732542290
832542310
932441320
1032441330
1132340340
1232240360
1322139370
1422039390
1521839410
1621738420
1721638440
1821437470
1921336490
2021135520
2121034540
222933560
231832590
241730611
251629631
261527661
271526671
280425701
290324721
300323731

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
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
296calm
306calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 11 h 54 min at the start of September to 12 hours by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 6 minutes over September. Sunrise moves from 6:18 AM to 6:02 AM, and sunset from 6:10 PM to 6:05 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.96:186:10
211.96:176:10
311.96:176:10
411.96:166:10
511.96:166:10
611.96:156:09
711.96:156:09
811.96:146:09
911.96:136:09
1011.96:136:09
1111.96:126:08
1211.96:126:08
1311.96:116:08
1412.06:116:08
1512.06:106:08
1612.06:106:08
1712.06:096:07
1812.06:086:07
1912.06:086:07
2012.06:076:07
2112.06:076:07
2212.06:066:06
2312.06:066:06
2412.06:056:06
2512.06:056:06
2612.06:046:06
2712.06:046:05
2812.06:036:05
2912.06:036:05
3012.06:026:05

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 6.21 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 4.5 kWh/m² to a high of 6.21 kWh/m² in September across the year — September's 6.21 kWh/m² sits near the top of that range.

0246151015202530
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
156.2Intense
166.2Intense
176.2Intense
186.2Intense
196.2Intense
206.2Intense
216.2Intense
226.2Intense
236.2Intense
246.2Intense
256.2Intense
266.2Intense
276.2Intense
286.2Intense
296.2Intense
306.2Intense
Planning a trip in September

Hazard calendar for São Geraldo do Araguaia

In seasonPeak

None of São Geraldo 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.

São Geraldo 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 São Geraldo do Araguaia?

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

3.5
Sightseeing
5th-best month of the year
7.0
Beach & pool
4th-best month of the year

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

What to pack for São Geraldo do Araguaia in September

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

In September, São Geraldo do Araguaia sees daytime highs around 34°C and nights near 24°C. Pack light clothes and sun protection. About 4 days see rain.

light clothessun protection

UV index in São Geraldo do Araguaia in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September 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 São Geraldo do Araguaia peaks around March 12 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 12 at about 10 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highExtremeMar 12UV 15Jul 12UV 10
UV index (midday)Level
Jan13Extreme
Feb15Extreme
Mar15Extreme
Apr13Extreme
May11Extreme
Jun10Very high
Jul10Very high
Aug10Extreme
Sep12Extreme
Oct11Extreme
Nov11Extreme
Dec10Extreme

Air quality in São Geraldo 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 São Geraldo do Araguaia is worst in September — around 42 µg/m³ PM2.5 (poor), about 6.2× the cleanest month (July, 7 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModerateModerateSep 1839 µg/m³Jul 107 µg/m³
PM2.5 (µg/m³)Level
Jan12Moderate
Feb12Good
Mar12Good
Apr12Good
May9Good
Jun8Good
Jul7Good
Aug16Moderate
Sep42Poor
Oct26Moderate
Nov24Moderate
Dec17Moderate
Location & terrain

Where is São Geraldo do Araguaia?

São Geraldo do Araguaia sits at 6.4°S, 48.6°W, 131 m above sea level, in Brazil. The nearest listed city is Eldorado dos Carajás, 94 km away.

Topography around São Geraldo do Araguaia

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

Within 3 km, the terrain around São Geraldo do Araguaia has only modest variations in elevation — a maximum elevation change of 97 m around an average of 133 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 450 m; within 80 km, significant variations in elevation — a maximum elevation change of 492 m.

The land around São Geraldo do Araguaia is covered by grassland (38%) and water (30%) within 3 km, grassland (57%) and trees (36%) within 16 km, and grassland (64%) and trees (34%) within 80 km.

3 km
97 m
16 km
450 m
80 km
492 m
treesgrasslandartificial surfaceswater
September weather nearby: Eldorado dos Carajás 94 km · Araguaína 96 km · Araguatins 97 km · São Domingos do Araguaia 98 km · Curionópolis 120 km · Estreito 124 km · Tocantinópolis 126 km · Porto Franco 128 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 São Geraldo do Araguaia (-6.4006°, -48.555°, elevation 131 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).