Rondonópolis weather in September

In September, Rondonópolis sees average daytime highs of 34°C and overnight lows near 22°C, with 43 mm of rain across 6.4 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 34°C through the month. The sky is clear or mostly clear about 56% of the time in September, and the air most often feels muggy.

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 Rondonópolis's 4th-clearest and 3rd-windiest month. For the whole year in context, see Rondonópolis's year-round climate.

Daytime high
34°
1st warmest
Overnight low
22°
5th coldest
Rainfall
43 mm
6.4 wet days
Daylight
11 h 54 min
6:36 AM – 6:30 PM
Cloud cover
41%
4th clearest
Wind
7 km/h
3rd windiest
Solar energy
5.87 kWh/m²
Travel score
3.5
out of 10

Rondonópolis 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 Rondonópolis reaches about 34°C in the afternoon and slips back to 22°C overnight — a 12°C spread between the day's warmth and the night's chill. On most days the high lands between 29°C and 37°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)
13420
23420
33421
43421
53421
63421
73421
83421
93421
103421
113421
123421
133422
143422
153422
163422
173422
183422
193422
203422
213422
223422
233422
243422
253422
263422
273422
283422
293422
303422

How September really feels in Rondonópolis

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.

Rondonópolis 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
Jan31° / 23°26724.612.92.9
Feb31° / 23°22322.312.62.9
Mar31° / 23°17722.412.13.1
Apr31° / 22°6911.211.64.3
May30° / 20°24411.25.7
Jun30° / 18°101.3116.3
Jul30° / 17°60.711.16.3
Aug33° / 19°81.611.44.8
Sep34° / 22°436.411.93.5
Oct33° / 23°11316.412.43.0
Nov32° / 23°1802112.83.0
Dec31° / 23°25024.9132.9

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 56% 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 28%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
18317
28218
38218
48119
58020
67921
77921
87723
97723
107624
117525
127525
137426
147327
157228
167327
177228
187228
197129
207129
216931
226832
236832
246634
256535
266337
276337
286139
296040
305941

Chance of precipitation in September

Any precipitation

Rondonópolis gets around 43 mm of rain over 6.4 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 22% and peaks near 38% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%50%151015202530
Rain chance (%)
113
213
313
414
514
614
714
815
915
1015
1116
1217
1317
1418
1519
1620
1721
1822
1923
2024
2125
2227
2328
2430
2532
2633
2734
2836
2937
3038

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 34% of days. Sticky, muggy-or-worse air turns up on roughly 51% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1143030233
2142930234
3142830244
4142730245
5132630256
6132530256
7132430267
8122330278
9122229289
101121292910
111120293011
121019293112
13918293213
14817293314
15716283415
16715283515
17614283616
18612273718
19511273819
20510263920
2149254021
2249244023
2348234125
2437224127
2537204129
2636194131
2736184133
2825174135
2925154136
3025144038

Wind in September

Winds average 7 km/h in September.

Across September, daily wind ranges from about 7 km/h on the calmest days to 8 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
18calm
28calm
38calm
48calm
58calm
68calm
77calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm

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 6:48 AM to 6:24 AM, and sunset from 6:28 PM to 6:32 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.76:486:28
211.76:476:29
311.76:466:29
411.76:466:29
511.76:456:29
611.86:446:29
711.86:436:29
811.86:426:29
911.86:426:29
1011.86:416:30
1111.86:406:30
1211.86:396:30
1311.96:386:30
1411.96:376:30
1511.96:366:30
1611.96:366:30
1711.96:356:30
1811.96:346:30
1912.06:336:30
2012.06:326:31
2112.06:316:31
2212.06:316:31
2312.06:306:31
2412.06:296:31
2512.16:286:31
2612.16:276:31
2712.16:266:31
2812.16:266:32
2912.16:256:32
3012.16:246:32

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.87 kWh/m².

For context, solar energy here swings from a low near 4.44 kWh/m² to a high of 6.1 kWh/m² in October across the year — September's 5.87 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
15.7Bright
25.7Bright
35.7Bright
45.7Bright
55.8Bright
65.8Bright
75.8Bright
85.8Bright
95.8Bright
105.8Bright
115.8Bright
125.8Bright
135.8Bright
145.8Bright
155.9Bright
165.9Bright
175.9Bright
185.9Bright
195.9Bright
205.9Bright
215.9Bright
225.9Bright
235.9Bright
245.9Bright
256.0Bright
266.0Bright
276.0Bright
286.0Bright
296.0Bright
306.0Intense
Planning a trip in September

Hazard calendar for Rondonópolis

In seasonPeak

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

Rondonópolis's monsoon runs November–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 Rondonópolis?

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

3.5
Sightseeing
6th-best month of the year
6.8
Beach & pool
5th-best month of the year

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

What to pack for Rondonópolis in September

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

In September, Rondonópolis sees daytime highs around 34°C and nights near 22°C. Pack light clothes. Worth having: sun protection. About 6 days see rain.

light clothessun protection

UV index in Rondonópolis 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 Rondonópolis peaks around January 21 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 21 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 21UV 15Jun 21UV 8
UV index (midday)Level
Jan15Extreme
Feb15Extreme
Mar14Extreme
Apr12Extreme
May9Very high
Jun8Very high
Jul8Very high
Aug9Very high
Sep8Very high
Oct11Extreme
Nov13Extreme
Dec13Extreme

Air quality in Rondonópolis 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 Rondonópolis is worst in September — around 31 µg/m³ PM2.5 (moderate), about 6.2× the cleanest month (July, 5 µg/m³).

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodSep 1630 µg/m³Jul 105 µg/m³
PM2.5 (µg/m³)Level
Jan9Good
Feb9Good
Mar8Good
Apr7Good
May6Good
Jun6Good
Jul5Good
Aug18Moderate
Sep31Moderate
Oct18Moderate
Nov9Good
Dec8Good
Location & terrain

Where is Rondonópolis?

Rondonópolis sits at 16.5°S, 54.6°W, 230 m above sea level, in Brazil. The nearest listed city is Pedra Preta, 24 km away.

Topography around Rondonópolis

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

Within 3 km, the terrain around Rondonópolis has only modest variations in elevation — a maximum elevation change of 105 m around an average of 232 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 270 m; within 80 km, large variations in elevation — a maximum elevation change of 620 m.

The land around Rondonópolis is covered by artificial surfaces (64%) and trees (21%) within 3 km, grassland (53%) and trees (31%) within 16 km, and grassland (45%) and trees (37%) within 80 km.

3 km
105 m
16 km
270 m
80 km
620 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Pedra Preta 24 km · Jaciara 66 km · Poxoréu 75 km · Campo Verde 118 km · Lucas 139 km · Chapada dos Guimarães 164 km · Santo Antônio do Leverger 168 km · Alto Araguaia 178 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 Rondonópolis (-16.4708°, -54.6356°, elevation 230 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).