Cerejeiras weather in September

In September, Cerejeiras sees average daytime highs of 33°C and overnight lows near 21°C, with 71 mm of rain across 12 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 Cerejeiras's 4th-clearest and 3rd-windiest month. For the whole year in context, see Cerejeiras's year-round climate.

Daytime high
33°
1st warmest
Overnight low
21°
5th coldest
Rainfall
71 mm
12 wet days
Daylight
11 h 54 min
6:00 AM – 5:55 PM
Cloud cover
51%
4th clearest
Wind
7 km/h
3rd windiest
Solar energy
5.74 kWh/m²
Travel score
3.6
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 Cerejeiras reaches about 33°C in the afternoon and slips back to 21°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
63321
73321
83321
93321
103321
113321
123321
133321
143321
153322
163322
173322
183322
193322
203322
213322
223322
233322
243322
253322
263222
273222
283222
293222
303222

How September really feels in Cerejeiras

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.

Cerejeiras 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° / 22°2942812.72.9
Feb29° / 22°28425.812.42.9
Mar30° / 22°25627.312.13.0
Apr30° / 22°14320.311.73.7
May29° / 20°6911.411.45.2
Jun30° / 19°173.211.26.1
Jul31° / 18°122.111.36.0
Aug32° / 19°244.211.64.7
Sep33° / 21°711211.93.6
Oct32° / 22°15720.812.33.0
Nov31° / 22°22524.212.63.0
Dec30° / 22°26927.212.83.0

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 20% 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 (%)
18020
27822
37723
47624
57426
67327
77228
87129
97030
106931
116832
126733
136634
146535
156436
166238
176238
186139
196040
205842
215842
225644
235545
245446
255248
265248
275149
284951
294951
304852

Chance of precipitation in September

Any precipitation

Cerejeiras gets around 71 mm of rain over 12 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 40% and peaks near 56% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
123
225
326
427
528
629
730
832
933
1034
1135
1236
1337
1438
1539
1640
1742
1843
1944
2045
2146
2247
2349
2450
2551
2652
2753
2854
2955
3056

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 48% of days. Sticky, muggy-or-worse air turns up on roughly 80% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
15122040230
25111940250
35111940260
45101840280
54101739290
6491739310
7491639320
8481638340
9481538360
10471537380
11361536400
12361435420
13351434440
14351333460
15341232480
16341231500
17341130520
18331130530
19331029550
20331028560
2122928590
2222926610
2322825630
2422824631
2522724641
2622723651
2722622671
2812622681
2912521701
3012521701

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 6:11 AM to 5:49 AM, and sunset from 5:55 PM to 5:56 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.76:115:55
211.86:105:55
311.86:095:55
411.86:095:55
511.86:085:55
611.86:075:55
711.86:065:55
811.86:065:55
911.86:055:55
1011.96:045:55
1111.96:035:55
1211.96:035:55
1311.96:025:55
1411.96:015:55
1511.96:005:55
1611.96:005:55
1711.95:595:55
1812.05:585:55
1912.05:575:55
2012.05:575:55
2112.05:565:55
2212.05:555:55
2312.05:555:55
2412.05:545:55
2512.05:535:56
2612.15:525:56
2712.15:525:56
2812.15:515:56
2912.15:505:56
3012.15:495:56

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.74 kWh/m².

For context, solar energy here swings from a low near 4.51 kWh/m² to a high of 5.85 kWh/m² in October across the year — September's 5.74 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
85.7Bright
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
265.9Bright
275.9Bright
285.9Bright
295.9Bright
305.9Bright
Planning a trip in September

Hazard calendar for Cerejeiras

In seasonPeak

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

Cerejeiras'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 Cerejeiras?

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

3.6
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 Cerejeiras. The water and warmth also suit a beach or pool day.

What to pack for Cerejeiras in September

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

In September, Cerejeiras sees daytime highs around 33°C and nights near 21°C. Pack light clothes. Worth having: rain gear and sun protection. About 12 days see rain.

light clothesrain gearsun protection

UV index in Cerejeiras 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 Cerejeiras peaks around January 21 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 21UV 15Sep 15UV 4
UV index (midday)Level
Jan16Extreme
Feb15Extreme
Mar15Extreme
Apr13Extreme
May10Very high
Jun9Very high
Jul8Very high
Aug9Very high
Sep3Moderate
Oct12Extreme
Nov13Extreme
Dec14Extreme

Air quality in Cerejeiras 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 Cerejeiras is worst in September — around 65 µg/m³ PM2.5 (unhealthy), about 7.7× the cleanest month (May, 9 µg/m³).

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

020406080JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateModerateSep 1662 µg/m³May 129 µg/m³
PM2.5 (µg/m³)Level
Jan11Good
Feb11Good
Mar11Good
Apr9Good
May9Good
Jun11Good
Jul9Good
Aug34Moderate
Sep65Unhealthy
Oct37Poor
Nov20Moderate
Dec13Moderate
Location & terrain

Where is Cerejeiras?

Cerejeiras sits at 13.2°S, 60.8°W, 264 m above sea level, in Brazil. The nearest listed city is Colorado do Oeste, 30 km away.

Topography around Cerejeiras

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

Within 3 km, the terrain around Cerejeiras has only modest variations in elevation — a maximum elevation change of 102 m around an average of 257 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 374 m; within 80 km, significant variations in elevation — a maximum elevation change of 498 m.

The land around Cerejeiras is covered by grassland (48%) and trees (23%) within 3 km, grassland (46%), cropland (28%) and trees (24%) within 16 km, and trees (56%) and grassland (31%) within 80 km.

3 km
102 m
16 km
374 m
80 km
498 m
treesshrubsgrasslandcroplandartificial surfaceswetland
September weather nearby: Colorado do Oeste 30 km · Vilhena 88 km · Comodoro 123 km · Rolim de Moura do Guaporé 159 km · Pimenta Bueno 174 km · Alta Floresta d'Oeste 184 km · Espigão dOeste 186 km · Rolim de Moura 188 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 Cerejeiras (-13.1889°, -60.8122°, elevation 264 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).