Cuiabá climate

Name: Cuiabá
Address: BR

Cuiabá is warmest in September, with average highs of 34 °C, and coldest in July, when nights average 19 °C. January is the wettest month (242 mm) and July the driest (5.8 mm). Figures are 1991–2020 climate normals.

Across a full year Cuiabá averages 1,381 mm of rain and 353 days above 25 °C.

Brazil · population 618,124 · 1991–2020 normals

Temperature below 0 °C to above 30 °C Rain band height is that month’s share of the wettest month

Warmest month September 34 °C
Coldest month July 19 °C
Driest month July 6 mm
Wettest month January 242 mm
Least cloud July 27 % cloud
Hottest on record September 42 °C
Coldest on record June 8.5 °C

What to expectCuiabá through the year

Cuiabá has a clear annual cycle: average daily highs run from 30 °C in July to 34 °C in September, a swing of 4.1 °C in mean temperature across the year.

Counted across a normal year, 353 days a year reach 25 °C, 256 of them reach 30 °C. The warmest reading in the 1991–2020 record is 42 °C, in September.

Rain is strongly seasonal. January averages 242 mm against 6 mm in July — 42 times as much. Planning around the dry months matters more here than planning around temperature.

Month by month

Month	Avg high	Rainfall	Cloud
January	30.5 °C	242 mm	82 %
February	30.4 °C	220 mm	82 %
March	30.5 °C	203 mm	76 %
April	30.4 °C	95 mm	60 %
May	29.7 °C	35 mm	50 %
June	30.0 °C	12 mm	36 %
July	30.4 °C	6 mm	27 %
August	32.6 °C	11 mm	29 %
September	33.8 °C	45 mm	43 %
October	33.1 °C	128 mm	65 %
November	31.5 °C	174 mm	76 %
December	30.9 °C	210 mm	81 %

Temperature month by month

Month	Avg high	Avg low	Mean	Record high	Record low	Days above 25 °C	Days above 30 °C
January	30.5 °C	23.7 °C	26.6 °C	35.6 °C	19.4 °C	31	20
February	30.4 °C	23.5 °C	26.5 °C	35.2 °C	19.3 °C	28	18
March	30.5 °C	23.4 °C	26.4 °C	34.5 °C	19.4 °C	31	19
April	30.4 °C	22.5 °C	26.1 °C	34.5 °C	14.1 °C	29	19
May	29.7 °C	20.6 °C	24.7 °C	34.8 °C	11.3 °C	28	17
June	30.0 °C	19.3 °C	24.1 °C	34.2 °C	8.5 °C	28	20
July	30.4 °C	18.5 °C	24.0 °C	34.9 °C	9.7 °C	28	21
August	32.6 °C	20.4 °C	26.1 °C	39.6 °C	10.3 °C	30	25
September	33.8 °C	22.8 °C	27.9 °C	42.2 °C	13.0 °C	29	26
October	33.1 °C	24.1 °C	28.1 °C	41.6 °C	16.2 °C	31	27
November	31.5 °C	23.8 °C	27.2 °C	38.0 °C	15.7 °C	30	23
December	30.9 °C	23.9 °C	26.9 °C	36.2 °C	17.6 °C	31	21

Rain, sun and wind month by month

Month	Rainfall	Wet days	Daylight	Cloud cover	Humidity	Wind
January	242 mm	25	13 h/day	82 %	81 %	12 km/h
February	220 mm	24	13 h/day	82 %	82 %	11 km/h
March	203 mm	25	12 h/day	76 %	83 %	10 km/h
April	95 mm	15	12 h/day	60 %	79 %	10 km/h
May	35 mm	5	11 h/day	50 %	73 %	11 km/h
June	12 mm	1	11 h/day	36 %	66 %	12 km/h
July	6 mm	1	11 h/day	27 %	59 %	13 km/h
August	11 mm	2	12 h/day	29 %	52 %	13 km/h
September	45 mm	7	12 h/day	43 %	57 %	13 km/h
October	128 mm	16	12 h/day	65 %	69 %	12 km/h
November	174 mm	20	13 h/day	76 %	76 %	12 km/h
December	210 mm	24	13 h/day	81 %	79 %	12 km/h

How Cuiabá compares

The same four figures for nearby destinations, so the numbers above have something to be read against. Summer high is the warmest month's average high; winter low is the coldest month's average low.

Destination	Summer high	Winter low	Rain per year	Days above 25 °C
Cuiabá	34 °C	19 °C	1,381 mm	353
Várzea Grande · Brazil	34 °C	18 °C	1,348 mm	353
Rondonópolis · Brazil	34 °C	18 °C	1,348 mm	358
Sinop · Brazil	34 °C	19 °C	1,695 mm	358
Rio Verde · Brazil	31 °C	16 °C	1,394 mm	337

Where Cuiabá ranks

Ranking	Position	Value
The warmest places in South America in November	17thof 50	32 °C
The warmest places in South America in October	26thof 50	33 °C
The warmest places in South America in September	26thof 50	34 °C
The warmest places in South America in December	27thof 50	31 °C
The warmest places in South America year-round	32ndof 50	31 °C
The warmest places in South America in August	33rdof 50	33 °C

Planning a trip? See the best time to visit Cuiabá.

QuestionsCommon questions about Cuiabá’s climate

When is the best time to visit Cuiabá?

That depends on what you want, so the honest answer is a comparison rather than a single month. May, June, July sit closest to 20 °C on average, September is the warmest month and July the driest. The month-by-month table above has the full picture.

How hot does Cuiabá get?

In September, the warmest month, daily highs average 34 °C. About 256 days a year pass 30 °C. The highest value in the 1991–2020 record is 42 °C.

How cold does it get in winter?

Nights average 19 °C in July, the coldest month. Freezing nights are not part of a normal year here.

Which month is wettest in Cuiabá?

January, averaging 242 mm over 25 days with rain. The driest month is July with 6 mm. The year as a whole averages 1,381 mm.

Are these figures a forecast?

No. They are 1991–2020 climate normals: the average of thirty years, which describes what a month is usually like in Cuiabá rather than what any particular week will bring. Individual years can differ substantially from the normal.

Data sources and method

ERA5 / ERA5-Land reanalysis — Copernicus Climate Change Service (C3S), ECMWF. Copernicus Licence
Open-Meteo — Open-Meteo.com. CC BY 4.0
NOAA OISST v2.1 — NOAA Physical Sciences Laboratory. Public domain
GeoNames — GeoNames.org. CC BY 4.0

Normal period: 1991–2020
Dataset version: era5-1991-2020-scores1.1
Last processed: 1 August 2026

Measured values come from ERA5 reanalysis and are reproduced unchanged. Calculated by us: monthly rankings, daylight hours, beach and comfort scores. Full formulas are on the methodology page.

Contains modified Copernicus Climate Change Service information 2026. Neither the European Commission nor ECMWF is responsible for any use that may be made of the Copernicus information or data it contains.