Rolim de Moura do Guaporé weather in September

In September, Rolim de Moura do Guaporé sees average daytime highs of 33°C and overnight lows near 22°C, with 71 mm of rain across 11.1 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 33°C through the month. The sky is clear or mostly clear about 43% of the time in September, and the air most often feels oppressive.

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 Rolim de Moura do Guaporé's 4th-clearest and 3rd-windiest month. For the whole year in context, see Rolim de Moura do Guaporé's year-round climate.

Daytime high
33°
1st warmest
Overnight low
22°
5th coldest
Rainfall
71 mm
11.1 wet days
Daylight
11 h 54 min
6:06 AM – 6:01 PM
Cloud cover
51%
4th clearest
Wind
7 km/h
3rd windiest
Solar energy
5.73 kWh/m²
Travel score
3.4
out of 10

Rolim de Moura do Guaporé 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 33°C through the month.

A typical September day in Rolim de Moura do Guaporé reaches about 33°C in the afternoon and slips back to 22°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 29°C and 36°C. Set against its neighbours, September runs on par with August and on par with October.

15°20°25°30°35°40°151015202530
Avg high (°C)Avg low (°C)
13321
23321
33321
43321
53321
63322
73322
83322
93322
103322
113322
123322
133322
143322
153322
163322
173322
183322
193322
203322
213322
223322
233322
243322
253322
263322
273322
283323
293323
303323

How September really feels in Rolim de Moura do Guaporé

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.

Rolim de Moura do Guaporé 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
Jan30° / 23°27527.812.72.7
Feb30° / 23°26925.312.42.8
Mar30° / 23°25627.412.12.8
Apr30° / 22°14319.711.73.6
May30° / 21°701211.44.9
Jun30° / 20°213.811.25.9
Jul31° / 19°122.311.35.8
Aug32° / 20°24411.64.6
Sep33° / 22°7111.111.93.4
Oct32° / 23°14819.912.32.9
Nov31° / 23°21223.412.62.8
Dec31° / 23°2622712.82.7

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 43% 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 38%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
17822
27624
37525
47525
57327
67228
77129
87129
96931
106832
116733
126535
136535
146337
156238
166139
175941
185842
195842
205644
215644
225545
235347
245347
255149
265149
275050
284852
294852
304753

Chance of precipitation in September

Any precipitation

Rolim de Moura do Guaporé gets around 71 mm of rain over 11.1 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 37% and peaks near 55% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
120
222
323
424
525
626
727
828
929
1030
1131
1232
1333
1434
1536
1637
1738
1839
1940
2042
2143
2245
2346
2448
2549
2651
2752
2853
2954
3055

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 86% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1571331441
2561230461
3561130471
4461130481
5461129491
6451029511
7451028521
8451028512
944927542
1044927542
1134926562
1233925582
1333825592
1433824593
1533823603
1633722623
1733722623
1833721633
1933620653
2033620653
2133619654
2223619664
2323518684
2423518675
2522517695
2622417696
2722416706
2812415726
2912415717
3012414727

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
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 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 6:16 AM to 5:55 AM, and sunset from 6:01 PM to 6:02 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.76:166:01
211.86:166:01
311.86:156:01
411.86:146:01
511.86:146:01
611.86:136:01
711.86:126:01
811.86:126:01
911.86:116:01
1011.96:106:01
1111.96:096:01
1211.96:096:01
1311.96:086:01
1411.96:076:01
1511.96:066:01
1611.96:066:01
1711.96:056:01
1812.06:046:01
1912.06:036:01
2012.06:036:01
2112.06:026:01
2212.06:016:01
2312.06:006:01
2412.06:006:01
2512.05:596:01
2612.15:586:01
2712.15:576:01
2812.15:576:01
2912.15:566:01
3012.15:556:02

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 4.37 kWh/m² to a high of 5.76 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
65.6Bright
75.6Bright
85.6Bright
95.7Bright
105.7Bright
115.7Bright
125.7Bright
135.7Bright
145.7Bright
155.7Bright
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 Rolim de Moura do Guaporé

In seasonPeak

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

Rolim de Moura do Guaporé's monsoon runs October–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 Rolim de Moura do Guaporé?

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

3.4
Sightseeing
6th-best month of the year
6.1
Beach & pool
5th-best month of the year

September is a weaker month for outdoor sightseeing in Rolim de Moura do Guaporé. The water and warmth also suit a beach or pool day.

What to pack for Rolim de Moura do Guaporé in September

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

In September, Rolim de Moura do Guaporé sees daytime highs around 33°C and nights near 22°C. Pack light clothes. Worth having: rain gear and sun protection. About 11 days see rain.

light clothesrain gearsun protection

UV index in Rolim de Moura do Guaporé 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 Rolim de Moura do Guaporé peaks around January 20 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near September 15 at about 4 (moderate).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highModerateExtremeJan 20UV 15Sep 15UV 4
UV index (midday)Level
Jan16Extreme
Feb15Extreme
Mar14Extreme
Apr12Extreme
May10Very high
Jun8Very high
Jul8Very high
Aug8Very high
Sep3Moderate
Oct9Very high
Nov14Extreme
Dec14Extreme

Air quality in Rolim de Moura do Guaporé 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 Rolim de Moura do Guaporé is worst in September — around 72 µg/m³ PM2.5 (unhealthy), about 9.5× the cleanest month (July, 8 µg/m³).

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

020406080JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateUnhealthyPoorModerateSep 1869 µg/m³Jul 98 µg/m³
PM2.5 (µg/m³)Level
Jan11Good
Feb11Good
Mar11Good
Apr9Good
May8Good
Jun8Good
Jul8Good
Aug36Poor
Sep72Unhealthy
Oct50Poor
Nov26Moderate
Dec13Moderate
Location & terrain

Where is Rolim de Moura do Guaporé?

Rolim de Moura do Guaporé sits at 13.1°S, 62.3°W, 159 m above sea level, in Brazil. The nearest listed city is Alta Floresta d'Oeste, 129 km away.

Topography around Rolim de Moura do Guaporé

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Rolim de Moura do Guaporé.

Within 3 km, the terrain around Rolim de Moura do Guaporé has only modest variations in elevation — a maximum elevation change of 28 m around an average of 154 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 196 m; within 80 km, significant variations in elevation — a maximum elevation change of 523 m.

The land around Rolim de Moura do Guaporé is covered by trees (58%) and wetland (27%) within 3 km, trees (58%) and wetland (34%) within 16 km, and trees (69%) and wetland (21%) within 80 km.

3 km
28 m
16 km
196 m
80 km
523 m
treesgrasslandwaterwetland
September weather nearby: Alta Floresta d'Oeste 129 km · Rolim de Moura 151 km · Cerejeiras 159 km · São Miguel do Guaporé 161 km · São Francisco do Guaporé 181 km · Colorado do Oeste 188 km · Pimenta Bueno 196 km · Cacoal 204 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 Rolim de Moura do Guaporé (-13.0827°, -62.2773°, elevation 159 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).