Chapadão do Sul weather in September

In September, Chapadão do Sul sees average daytime highs of 31°C and overnight lows near 19°C, with 85 mm of rain across 9.5 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 31°C through the month. The sky is clear or mostly clear about 47% of the time in September, and the air most often feels dry.

Daylight stretches from about 11 h 36 min at the start of September to 12 h 12 min by month's end. Set against the rest of the year, September is Chapadão do Sul's 4th-clearest and 3rd-windiest month. For the whole year in context, see Chapadão do Sul's year-round climate.

Daytime high
31°
1st warmest
Overnight low
19°
6th coldest
Rainfall
85 mm
9.5 wet days
Daylight
11 h 54 min
6:28 AM – 6:22 PM
Cloud cover
45%
4th clearest
Wind
9 km/h
3rd windiest
Solar energy
5.67 kWh/m²
Travel score
4.8
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 31°C through the month.

A typical September day in Chapadão do Sul reaches about 31°C in the afternoon and slips back to 19°C overnight — a 12°C spread between the day's warmth and the night's chill. On most days the high lands between 26°C and 35°C. Set against its neighbours, September runs about 1°C warmer than August and on par with October.

15°20°25°30°35°40°151015202530
Avg high (°C)Avg low (°C)
13118
23119
33119
43119
53119
63119
73119
83119
93119
103119
113119
123119
133119
143119
153119
163119
173119
183119
193119
203119
213119
223120
233120
243120
253120
263120
273120
283120
293120
303120

Chapadão do Sul 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°28525.8133.4
Feb29° / 21°25022.812.63.4
Mar29° / 20°2352412.13.7
Apr29° / 19°9712.711.65.3
May27° / 17°466.311.17.2
Jun27° / 16°152.310.98.0
Jul27° / 16°101.6118.1
Aug30° / 17°232.911.46.5
Sep31° / 19°859.511.94.8
Oct30° / 20°16019.612.43.7
Nov29° / 20°23022.912.93.6
Dec29° / 21°27626.313.13.4

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 47% 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 35%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
17723
27723
37525
47525
57525
67525
77426
87327
97327
107129
117030
127030
136931
146832
156733
166634
176634
186535
196436
206337
216139
226040
235842
245743
255545
265545
275347
285149
295149
304951

Chance of precipitation in September

Any precipitation

Chapadão do Sul gets around 85 mm of rain over 9.5 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 32% and peaks near 52% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
117
218
319
419
520
621
721
822
923
1024
1125
1226
1327
1428
1529
1630
1732
1833
1935
2036
2138
2240
2341
2443
2545
2646
2748
2849
2950
3052

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 36% of days. Sticky, muggy-or-worse air turns up on roughly 17% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
15821174
25721184
35521195
45421205
55420206
65220217
75120227
84921228
94721239
1046212310
1144222410
1242222511
1340222512
1439232613
1537232714
1635232715
1733232816
1832232817
1930232918
2028232919
2127233021
2225233022
2323223024
2422213026
2521213028
2620203030
2719193033
2818182935
2917172937
3016162939

Wind in September

Winds average 9 km/h in September.

Across September, daily wind ranges from about 9 km/h on the calmest days to 10 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
110calm
210calm
310calm
410calm
510calm
610calm
710calm
810calm
910calm
1010calm
1110calm
1210calm
1310calm
1410calm
159calm
169calm
179calm
189calm
199calm
209calm
219calm
229calm
239calm
249calm
259calm
269calm
279calm
289calm
299calm
309calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 11 h 36 min at the start of September to 12 h 12 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 36 minutes over September. Sunrise moves from 6:41 AM to 6:15 AM, and sunset from 6:19 PM to 6:24 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.66:416:19
211.66:416:19
311.76:406:19
411.76:396:20
511.76:386:20
611.76:376:20
711.76:366:20
811.76:356:20
911.86:346:20
1011.86:336:21
1111.86:336:21
1211.86:326:21
1311.86:316:21
1411.96:306:21
1511.96:296:21
1611.96:286:22
1711.96:276:22
1811.96:266:22
1911.96:256:22
2012.06:246:22
2112.06:236:23
2212.06:226:23
2312.06:226:23
2412.06:216:23
2512.16:206:23
2612.16:196:23
2712.16:186:24
2812.16:176:24
2912.16:166:24
3012.26:156:24

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.67 kWh/m².

For context, solar energy here swings from a low near 4.13 kWh/m² to a high of 5.91 kWh/m² in October across the year — September's 5.67 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
15.5Bright
25.5Bright
35.5Bright
45.5Bright
55.5Bright
65.5Bright
75.6Bright
85.6Bright
95.6Bright
105.6Bright
115.6Bright
125.6Bright
135.6Bright
145.6Bright
155.7Bright
165.7Bright
175.7Bright
185.7Bright
195.7Bright
205.7Bright
215.7Bright
225.7Bright
235.8Bright
245.8Bright
255.8Bright
265.8Bright
275.8Bright
285.8Bright
295.8Bright
305.8Bright
Planning a trip in September

Hazard calendar for Chapadão do Sul

In seasonPeak

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

Chapadão do Sul'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 Chapadão do Sul?

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

4.8
Sightseeing
6th-best month of the year
6.9
Beach & pool
5th-best month of the year

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

What to pack for Chapadão do Sul in September

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

In September, Chapadão do Sul sees daytime highs around 31°C and nights near 19°C. Pack light clothes. Worth having: rain gear and sun protection. About 10 days see rain.

light clothesrain gearsun protection

UV index in Chapadão do Sul in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 8 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Chapadão do Sul peaks around January 22 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 22 at about 7 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highExtremeJan 22UV 15Jun 22UV 7
UV index (midday)Level
Jan15Extreme
Feb15Extreme
Mar13Extreme
Apr11Extreme
May8Very high
Jun7Very high
Jul7Very high
Aug9Very high
Sep8Very high
Oct11Extreme
Nov14Extreme
Dec14Extreme

Air quality in Chapadão do Sul 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 Chapadão do Sul is worst in September — around 16 µg/m³ PM2.5 (moderate), about 4.1× the cleanest month (June, 4 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodSep 1816 µg/m³Jun 184 µg/m³
PM2.5 (µg/m³)Level
Jan6Good
Feb6Good
Mar6Good
Apr5Good
May5Good
Jun4Good
Jul5Good
Aug9Good
Sep16Moderate
Oct12Good
Nov5Good
Dec6Good
Location & terrain

Where is Chapadão do Sul?

Chapadão do Sul sits at 18.8°S, 52.6°W, 812 m above sea level, in Brazil. The nearest listed city is Costa Rica, 60 km away.

Topography around Chapadão do Sul

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

Within 3 km, the terrain around Chapadão do Sul has only modest variations in elevation — a maximum elevation change of 45 m around an average of 808 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 240 m; within 80 km, significant variations in elevation — a maximum elevation change of 517 m.

The land around Chapadão do Sul is covered by cropland (65%) and artificial surfaces (23%) within 3 km, cropland (76%) within 16 km, and cropland (49%) and grassland (28%) within 80 km.

3 km
45 m
16 km
240 m
80 km
517 m
treesshrubsgrasslandcroplandartificial surfacesbare terrain
September weather nearby: Costa Rica 60 km · Cassilândia 100 km · Mineiros 136 km · Jataí 139 km · Alto Araguaia 176 km · Paranaíba 180 km · Água Clara 186 km · Rio Verde 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 Chapadão do Sul (-18.7942°, -52.6228°, elevation 812 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).