Cuiabá weather in September

In September, Cuiabá sees average daytime highs of 34°C and overnight lows near 22°C, with 47 mm of rain across 7.2 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 54% 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 Cuiabá's 4th-clearest and 3rd-windiest month. For the whole year in context, see Cuiabá's year-round climate.

Daytime high
34°
1st warmest
Overnight low
22°
5th coldest
Rainfall
47 mm
7.2 wet days
Daylight
11 h 54 min
6:41 AM – 6:36 PM
Cloud cover
43%
4th clearest
Wind
8 km/h
3rd windiest
Solar energy
5.84 kWh/m²
Travel score
3.4
out of 10

Cuiabá 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 Cuiabá 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 28°C and 38°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)
13421
23421
33421
43421
53421
63421
73422
83422
93422
103422
113422
123422
133422
143422
153422
163422
173422
183422
193422
203423
213423
223423
233423
243423
253423
263423
273423
283423
293423
303423

How September really feels in Cuiabá

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.

Cuiabá 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°24825.712.82.8
Feb31° / 23°21824.312.52.7
Mar31° / 23°20825.212.12.8
Apr31° / 22°10015.111.73.9
May30° / 20°355.511.35.4
Jun30° / 19°111.311.16.1
Jul31° / 18°60.811.26.2
Aug33° / 20°111.911.54.7
Sep34° / 22°477.211.93.4
Oct33° / 23°13217.412.42.8
Nov32° / 23°1792112.72.9
Dec31° / 23°21525.312.92.7

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 54% 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 30%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
18317
28218
38119
48020
58020
67921
77822
87723
97723
107525
117525
127327
137327
147228
157129
167129
177030
186931
196832
206733
216634
226436
236436
246238
256139
266040
275941
285743
295743
305545

Chance of precipitation in September

Any precipitation

Cuiabá gets around 47 mm of rain over 7.2 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 25% and peaks near 44% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%50%151015202530
Rain chance (%)
112
212
313
413
514
614
715
815
916
1017
1117
1218
1319
1420
1521
1622
1724
1825
1926
2028
2130
2231
2333
2435
2537
2639
2740
2842
2943
3044

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 32% of days. Sticky, muggy-or-worse air turns up on roughly 60% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
192034289
291934289
3919332910
4919322911
5918322912
6918313013
7917303014
8816303115
9816293116
10815293217
11714283219
12713273320
13712263322
14611263423
15610253425
1659243527
1759233528
1858233530
1947223532
2047213534
2146203536
2236193438
2335173440
2435163442
2535153345
2624143247
2724133249
2824133150
2923123053
3013113055

Wind in September

Winds average 8 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.

051015151015202530
Wind speed (km/h)Feels
18calm
28calm
38calm
48calm
58calm
68calm
78calm
88calm
98calm
108calm
118calm
128calm
138calm
148calm
158calm
168calm
178calm
188calm
198calm
208calm
218calm
228calm
238calm
248calm
258calm
268calm
278calm
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 6:53 AM to 6:30 AM, and sunset from 6:35 PM to 6:37 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.76:536:35
211.76:536:35
311.76:526:35
411.76:516:35
511.86:506:35
611.86:496:35
711.86:496:35
811.86:486:36
911.86:476:36
1011.86:466:36
1111.86:456:36
1211.96:456:36
1311.96:446:36
1411.96:436:36
1511.96:426:36
1611.96:416:36
1711.96:406:36
1811.96:406:36
1912.06:396:36
2012.06:386:36
2112.06:376:37
2212.06:366:37
2312.06:366:37
2412.06:356:37
2512.06:346:37
2612.16:336:37
2712.16:326:37
2812.16:326:37
2912.16:316:37
3012.16:306:37

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.84 kWh/m².

For context, solar energy here swings from a low near 4.45 kWh/m² to a high of 6.05 kWh/m² in October across the year — September's 5.84 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
75.8Bright
85.8Bright
95.8Bright
105.8Bright
115.8Bright
125.8Bright
135.8Bright
145.8Bright
155.8Bright
165.8Bright
175.8Bright
185.9Bright
195.9Bright
205.9Bright
215.9Bright
225.9Bright
235.9Bright
245.9Bright
255.9Bright
265.9Bright
275.9Bright
286.0Bright
296.0Bright
306.0Bright
Planning a trip in September

Hazard calendar for Cuiabá

In seasonPeak

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

Cuiabá's monsoon runs October–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 Cuiabá?

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
6.6
Beach & pool
5th-best month of the year

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

What to pack for Cuiabá in September

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

In September, Cuiabá sees daytime highs around 34°C and nights near 22°C. Pack light clothes. Worth having: sun protection. About 7 days see rain.

light clothessun protection

UV index in Cuiabá in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 7 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Cuiabá peaks around January 21 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near September 14 at about 7 (high).

The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highExtremeJan 21UV 15Sep 14UV 7
UV index (midday)Level
Jan15Extreme
Feb15Extreme
Mar14Extreme
Apr12Extreme
May9Very high
Jun8Very high
Jul8Very high
Aug9Very high
Sep7High
Oct11Extreme
Nov13Extreme
Dec13Extreme

Air quality in Cuiabá 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 Cuiabá is worst in September — around 70 µg/m³ PM2.5 (unhealthy), about 6.6× the cleanest month (January, 11 µg/m³).

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

020406080JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateUnhealthyModerateSep 1566 µg/m³Apr 1611 µg/m³
PM2.5 (µg/m³)Level
Jan11Good
Feb11Good
Mar11Good
Apr11Good
May11Good
Jun11Good
Jul14Moderate
Aug39Poor
Sep70Unhealthy
Oct23Moderate
Nov13Moderate
Dec12Moderate
Location & terrain

Where is Cuiabá?

Cuiabá sits at 15.6°S, 56.1°W, 193 m above sea level, in Brazil. The nearest listed city is Várzea Grande, 7.0 km away.

Topography around Cuiabá

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

Within 3 km, the terrain around Cuiabá has only modest variations in elevation — a maximum elevation change of 90 m around an average of 179 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 134 m; within 80 km, large variations in elevation — a maximum elevation change of 795 m.

The land around Cuiabá is covered by artificial surfaces (77%) within 3 km, grassland (37%), trees (34%) and artificial surfaces (21%) within 16 km, and trees (44%) and grassland (39%) within 80 km.

3 km
90 m
16 km
134 m
80 km
795 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwaterwetland
September weather nearby: Várzea Grande 7.0 km · Santo Antônio do Leverger 30 km · Chapada dos Guimarães 40 km · Lucas 84 km · Rosário Oeste 92 km · Poconé 93 km · Campo Verde 100 km · Nobres 100 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 Cuiabá (-15.5961°, -56.0967°, elevation 193 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).