Ouro Preto do Oeste weather in September

In September, Ouro Preto do Oeste sees average daytime highs of 33°C and overnight lows near 23°C, with 85 mm of rain across 13.4 wet days and about 11.9 hours of daylight. It is the 2nd-warmest and 8th-wettest month of the year here.

Day-to-day highs hold fairly steady near 33°C through the month. The sky is clear or mostly clear about 35% of the time in September, and the air most often feels oppressive.

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 Ouro Preto do Oeste's 4th-clearest and 4th-windiest month. For the whole year in context, see Ouro Preto do Oeste's year-round climate.

Daytime high
33°
2nd warmest
Overnight low
23°
9th coldest
Rainfall
85 mm
13.4 wet days
Daylight
11 h 54 min
6:05 AM – 6:01 PM
Cloud cover
55%
4th clearest
Wind
6 km/h
4th windiest
Solar energy
5.73 kWh/m²
Travel score
3.1
out of 10

Ouro Preto do Oeste is 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 33°C through the month.

A typical September day in Ouro Preto do Oeste reaches about 33°C in the afternoon and slips back to 23°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 30°C and 36°C. Set against its neighbours, September runs on par with August and about 1°C warmer than October.

20°25°30°35°40°151015202530
Avg high (°C)Avg low (°C)
13422
23422
33422
43422
53422
63422
73422
83422
93422
103423
113423
123423
133423
143423
153423
163323
173323
183323
193323
203323
213323
223323
233323
243323
253323
263323
273323
283323
293323
303323

How September really feels in Ouro Preto do Oeste

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.

Ouro Preto do Oeste weather by month

How September compares with the rest of the year at a glance. September is the 2nd-warmest and 8th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan29° / 23°27228.512.62.9
Feb29° / 23°26226.112.42.9
Mar30° / 23°2352812.12.9
Apr30° / 22°14822.911.83.4
May30° / 22°7914.811.54.5
Jun31° / 21°203.911.45.4
Jul32° / 20°122.111.44.9
Aug34° / 21°244.511.63.8
Sep33° / 23°8513.411.93.1
Oct32° / 23°14821.212.22.8
Nov31° / 23°22124.512.52.9
Dec30° / 23°25426.912.63.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 35% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 25% of September, with mostly cloudy or overcast conditions the remaining 40%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
17327
27129
37129
47030
57030
67030
76832
86832
96733
106634
116634
126535
136337
146238
156139
166040
175842
185842
195743
205545
215446
225248
235248
245149
255050
264951
274852
284753
294654
304654

Chance of precipitation in September

Any precipitation

Ouro Preto do Oeste gets around 85 mm of rain over 13.4 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 44% and peaks near 61% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
130
231
332
433
534
635
735
836
937
1037
1138
1239
1340
1441
1542
1643
1744
1846
1947
2048
2150
2251
2353
2454
2556
2657
2758
2859
2960
3061

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 60% of days. Sticky, muggy-or-worse air turns up on roughly 87% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1461835370
2461835380
3351735400
4351635410
5351535420
6341535440
7241434450
8241434470
9241333480
10241332490
11231232510
12131131540
13131030560
14131030560
1513929580
1613828600
1703727630
1803626650
1903625660
2003524680
2103523690
2203421720
2302420740
2402319760
2502318761
2602217781
2702216791
2802215801
2902215801
3001214821

Wind in September

Winds average 6 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
56calm
66calm
76calm
86calm
96calm
106calm
116calm
126calm
136calm
146calm
156calm
166calm
176calm
186calm
196calm
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 6:15 AM to 5:56 AM, and sunset from 6:02 PM to 6:01 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.86:156:02
211.86:146:02
311.86:146:02
411.86:136:02
511.86:126:02
611.86:126:02
711.96:116:02
811.96:106:02
911.96:106:02
1011.96:096:02
1111.96:086:02
1211.96:086:02
1311.96:076:02
1411.96:066:02
1511.96:066:01
1611.96:056:01
1712.06:046:01
1812.06:046:01
1912.06:036:01
2012.06:026:01
2112.06:026:01
2212.06:016:01
2312.06:006:01
2412.06:006:01
2512.05:596:01
2612.05:586:01
2712.15:586:01
2812.15:576:01
2912.15:566:01
3012.15:566:01

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.73 kWh/m².

For context, solar energy here swings from a low near 4.5 kWh/m² to a high of 5.77 kWh/m² in October across the year — September's 5.73 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
15.6Bright
25.6Bright
35.6Bright
45.6Bright
55.6Bright
65.7Bright
75.7Bright
85.7Bright
95.7Bright
105.7Bright
115.7Bright
125.7Bright
135.7Bright
145.8Bright
155.8Bright
165.8Bright
175.8Bright
185.8Bright
195.8Bright
205.8Bright
215.8Bright
225.8Bright
235.8Bright
245.8Bright
255.8Bright
265.8Bright
275.8Bright
285.8Bright
295.8Bright
305.8Bright
Planning a trip in September

Hazard calendar for Ouro Preto do Oeste

In seasonPeak

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

Ouro Preto do Oeste's rainy season runs October–April, when most of the year's rain falls.

Rainy season
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is September a good time to visit Ouro Preto do Oeste?

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

3.1
Sightseeing
6th-best month of the year
5.7
Beach & pool
5th-best month of the year

September is a weaker month for outdoor sightseeing in Ouro Preto do Oeste.

What to pack for Ouro Preto do Oeste in September

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

In September, Ouro Preto do Oeste sees daytime highs around 33°C and nights near 23°C. Pack light clothes. Worth having: rain gear and sun protection. About 13 days see rain.

light clothesrain gearsun protection

UV index in Ouro Preto do Oeste in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 3. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Ouro Preto do Oeste peaks around January 24 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near September 13 at about 3 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 11 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highModerateExtremeJan 24UV 15Sep 13UV 3
UV index (midday)Level
Jan15Extreme
Feb15Extreme
Mar15Extreme
Apr13Extreme
May10Extreme
Jun9Very high
Jul9Very high
Aug6High
Sep3Moderate
Oct11Extreme
Nov13Extreme
Dec14Extreme

Air quality in Ouro Preto do Oeste 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 Ouro Preto do Oeste is worst in September — around 57 µg/m³ PM2.5 (unhealthy), about 7.3× the cleanest month (June, 8 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodPoorModerateSep 1454 µg/m³Jun 198 µg/m³
PM2.5 (µg/m³)Level
Jan12Moderate
Feb12Good
Mar13Moderate
Apr10Good
May9Good
Jun8Good
Jul8Good
Aug39Poor
Sep57Unhealthy
Oct24Moderate
Nov17Moderate
Dec14Moderate
Location & terrain

Where is Ouro Preto do Oeste?

Ouro Preto do Oeste sits at 10.7°S, 62.2°W, 214 m above sea level, in Brazil. The nearest listed city is Ji Paraná, 33 km away.

Topography around Ouro Preto do Oeste

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Ouro Preto do Oeste.

Within 3 km, the terrain around Ouro Preto do Oeste has significant variations in elevation — a maximum elevation change of 275 m around an average of 229 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 303 m; within 80 km, significant variations in elevation — a maximum elevation change of 462 m.

The land around Ouro Preto do Oeste is covered by grassland (59%) and trees (40%) within 3 km, grassland (73%) and trees (25%) within 16 km, and grassland (67%) and trees (32%) within 80 km.

3 km
275 m
16 km
303 m
80 km
462 m
treesgrasslandartificial surfaces
September weather nearby: Ji Paraná 33 km · Jaru 44 km · Presidente Médici 59 km · Cacoal 114 km · São Miguel do Guaporé 118 km · Rolim de Moura 126 km · Ariquemes 129 km · Alta Floresta d'Oeste 139 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 Ouro Preto do Oeste (-10.7481°, -62.2158°, elevation 214 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).