Rolim de Moura weather in September

In September, Rolim de Moura sees average daytime highs of 33°C and overnight lows near 22°C, with 54 mm of rain across 10.1 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 42% 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 Rolim de Moura's 4th-clearest and 4th-windiest month. For the whole year in context, see Rolim de Moura's year-round climate.

Daytime high
33°
1st warmest
Overnight low
22°
6th coldest
Rainfall
54 mm
10.1 wet days
Daylight
11 h 54 min
6:03 AM – 6:00 PM
Cloud cover
51%
4th clearest
Wind
6 km/h
4th windiest
Solar energy
5.78 kWh/m²
Travel score
3.3
out of 10

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 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 30°C and 36°C. Set against its neighbours, September runs on par with August and about 1°C warmer than October.

15°20°25°30°35°40°151015202530
Avg high (°C)Avg low (°C)
13422
23422
33422
43422
53422
63422
73422
83422
93422
103422
113422
123422
133422
143322
153322
163322
173322
183322
193322
203322
213322
223322
233322
243322
253322
263322
273322
283322
293322
303322

How September really feels in Rolim de Moura

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 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° / 22°25227.612.63.0
Feb29° / 22°25025.512.43.0
Mar30° / 22°21326.512.13.1
Apr30° / 22°11519.411.73.8
May30° / 21°491011.55.1
Jun31° / 20°92.311.35.6
Jul32° / 20°61.611.45.3
Aug33° / 21°163.111.64.2
Sep33° / 22°5410.111.93.3
Oct33° / 23°10317.112.33.0
Nov31° / 23°17021.712.53.1
Dec30° / 22°22325.112.73.1

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 42% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 22% of September, with mostly cloudy or overcast conditions the remaining 37%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
17723
27624
37525
47426
57327
67327
77228
87129
97129
107030
116931
126733
136634
146535
156436
166337
176238
186139
196040
205941
215743
225743
235644
245545
255446
265347
275248
285149
295050
304951

Chance of precipitation in September

Any precipitation

Rolim de Moura gets around 54 mm of rain over 10.1 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 34% and peaks near 47% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
121
222
323
424
525
625
726
826
927
1028
1128
1229
1330
1431
1532
1633
1734
1835
1936
2037
2138
2240
2341
2442
2543
2644
2745
2846
2947
3047

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 50% of days. Sticky, muggy-or-worse air turns up on roughly 82% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
149214026
248204028
348204029
437194030
537184031
637184033
737173934
827173936
926163837
1026153739
1126153741
1226143643
1316133545
1415133447
1515123349
1615113251
1714103154
1814103055
191493056
201482958
211472860
221362862
231362763
241352665
251352665
261342567
270242569
280242470
290232471
300232372

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
57calm
67calm
77calm
87calm
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 6:14 AM to 5:54 AM, and sunset from 6:00 PM to 5:59 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.86:146:00
211.86:136:00
311.86:126:00
411.86:126:00
511.86:116:00
611.86:106:00
711.86:106:00
811.86:096:00
911.96:086:00
1011.96:086:00
1111.96:076:00
1211.96:066:00
1311.96:066:00
1411.96:056:00
1511.96:046:00
1611.96:036:00
1711.96:036:00
1812.06:026:00
1912.06:015:59
2012.06:015:59
2112.06:005:59
2212.05:595:59
2312.05:595:59
2412.05:585:59
2512.05:575:59
2612.05:565:59
2712.15:565:59
2812.15:555:59
2912.15:545:59
3012.15:545:59

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.78 kWh/m².

For context, solar energy here swings from a low near 4.57 kWh/m² to a high of 5.88 kWh/m² in October across the year — September's 5.78 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
15.7Bright
25.7Bright
35.7Bright
45.7Bright
55.7Bright
65.7Bright
75.7Bright
85.7Bright
95.7Bright
105.7Bright
115.8Bright
125.8Bright
135.8Bright
145.8Bright
155.8Bright
165.8Bright
175.8Bright
185.8Bright
195.8Bright
205.8Bright
215.8Bright
225.8Bright
235.8Bright
245.9Bright
255.9Bright
265.9Bright
275.9Bright
285.9Bright
295.9Bright
305.9Bright
Planning a trip in September

Hazard calendar for Rolim de Moura

In seasonPeak

None of Rolim de Moura'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'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 Rolim de Moura?

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

3.3
Sightseeing
6th-best month of the year
6.2
Beach & pool
5th-best month of the year

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

What to pack for Rolim de Moura in September

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

In September, Rolim de Moura sees daytime highs around 33°C and nights near 22°C. Pack light clothes. Worth having: rain gear and sun protection. About 10 days see rain.

light clothesrain gearsun protection

UV index in Rolim de Moura in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 3 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Rolim de Moura peaks around January 23 at about 16 (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 — every month of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highModerateExtremeJan 23UV 16Sep 15UV 4
UV index (midday)Level
Jan16Extreme
Feb15Extreme
Mar15Extreme
Apr13Extreme
May10Very high
Jun9Very high
Jul8Very high
Aug9Very high
Sep3Moderate
Oct11Extreme
Nov14Extreme
Dec14Extreme

Air quality in Rolim de Moura 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 is worst in September — around 54 µg/m³ PM2.5 (poor), about 6.7× the cleanest month (June, 8 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecGoodModeratePoorModerateSep 1550 µg/m³Jun 238 µg/m³
PM2.5 (µg/m³)Level
Jan11Good
Feb11Good
Mar12Good
Apr9Good
May8Good
Jun8Good
Jul8Good
Aug29Moderate
Sep54Poor
Oct22Moderate
Nov15Moderate
Dec13Moderate
Location & terrain

Where is Rolim de Moura?

Rolim de Moura sits at 11.8°S, 61.8°W, 254 m above sea level, in Brazil. The nearest listed city is Alta Floresta d'Oeste, 25 km away.

Topography around Rolim de Moura

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

Within 3 km, the terrain around Rolim de Moura has only modest variations in elevation — a maximum elevation change of 84 m around an average of 263 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 254 m; within 80 km, significant variations in elevation — a maximum elevation change of 422 m.

The land around Rolim de Moura is covered by grassland (79%) and trees (21%) within 3 km, grassland (74%) and trees (22%) within 16 km, and grassland (65%) and trees (34%) within 80 km.

3 km
84 m
16 km
254 m
80 km
422 m
treesgrasslandcroplandartificial surfaces
September weather nearby: Alta Floresta d'Oeste 25 km · Cacoal 56 km · Pimenta Bueno 68 km · Presidente Médici 71 km · Espigão dOeste 92 km · São Miguel do Guaporé 100 km · Ji Paraná 103 km · Ouro Preto do Oeste 126 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 (-11.8036°, -61.8033°, elevation 254 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).