Cotia climate

Name: Cotia
Address: BR

Cotia is warmest in February, with average highs of 26 °C, and coldest in July, when nights average 12 °C. January is the wettest month (233 mm) and August the driest (37 mm). Figures are 1991–2020 climate normals.

Across a full year Cotia averages 1,331 mm of rain and 155 days above 25 °C.

Brazil · population 253,608 · 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 February 26 °C
Coldest month July 12 °C
Driest month August 37 mm
Wettest month January 233 mm
Least cloud August 51 % cloud
Hottest on record October 35 °C
Coldest on record June 2.2 °C

What to expectCotia through the year

Cotia has a clear annual cycle: average daily highs run from 21 °C in July to 26 °C in February, a swing of 6.1 °C in mean temperature across the year.

Counted across a normal year, 155 days a year reach 25 °C, 13 of them reach 30 °C. The warmest reading in the 1991–2020 record is 35 °C, in October.

Rain is strongly seasonal. January averages 233 mm against 37 mm in August — 6.2 times as much. Planning around the dry months matters more here than planning around temperature.

Month by month

Month	Avg high	Rainfall	Cloud
January	26.2 °C	233 mm	79 %
February	26.5 °C	167 mm	74 %
March	25.5 °C	137 mm	70 %
April	24.3 °C	64 mm	63 %
May	21.7 °C	61 mm	62 %
June	21.2 °C	48 mm	55 %
July	21.2 °C	49 mm	51 %
August	22.6 °C	37 mm	51 %
September	24.0 °C	85 mm	62 %
October	24.8 °C	117 mm	73 %
November	24.6 °C	149 mm	74 %
December	25.9 °C	183 mm	75 %

Temperature month by month

Month	Avg high	Avg low	Mean	Record high	Record low	Days above 25 °C	Days above 30 °C
January	26.2 °C	18.9 °C	21.9 °C	32.7 °C	12.9 °C	21	2
February	26.5 °C	19.0 °C	22.1 °C	34.4 °C	13.5 °C	20	2
March	25.5 °C	18.3 °C	21.2 °C	31.1 °C	12.9 °C	19	0
April	24.3 °C	16.7 °C	19.8 °C	30.2 °C	9.3 °C	13	0
May	21.7 °C	14.1 °C	17.3 °C	28.3 °C	7.1 °C	4	0
June	21.2 °C	12.9 °C	16.4 °C	26.9 °C	2.2 °C	2	0
July	21.2 °C	12.2 °C	16.0 °C	28.7 °C	3.7 °C	3	0
August	22.6 °C	12.8 °C	17.0 °C	31.9 °C	4.7 °C	10	0
September	24.0 °C	14.4 °C	18.4 °C	33.9 °C	5.7 °C	13	3
October	24.8 °C	15.9 °C	19.7 °C	35.3 °C	8.9 °C	15	3
November	24.6 °C	16.6 °C	20.0 °C	33.7 °C	9.6 °C	14	1
December	25.9 °C	18.1 °C	21.4 °C	31.9 °C	10.7 °C	20	1

Rain, sun and wind month by month

Month	Rainfall	Wet days	Daylight	Cloud cover	Humidity	Wind
January	233 mm	23	13 h/day	79 %	85 %	16 km/h
February	167 mm	19	13 h/day	74 %	85 %	16 km/h
March	137 mm	19	12 h/day	70 %	86 %	16 km/h
April	64 mm	9	12 h/day	63 %	84 %	15 km/h
May	61 mm	7	11 h/day	62 %	82 %	15 km/h
June	48 mm	5	11 h/day	55 %	80 %	15 km/h
July	49 mm	5	11 h/day	51 %	78 %	16 km/h
August	37 mm	5	11 h/day	51 %	77 %	16 km/h
September	85 mm	9	12 h/day	62 %	78 %	18 km/h
October	117 mm	14	13 h/day	73 %	82 %	18 km/h
November	149 mm	16	13 h/day	74 %	83 %	18 km/h
December	183 mm	20	14 h/day	75 %	84 %	17 km/h

How Cotia 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
Cotia	26 °C	12 °C	1,331 mm	155
Barueri · Brazil	27 °C	12 °C	1,320 mm	178
Taboão da Serra · Brazil	26 °C	12 °C	1,704 mm	153
Itapecerica da Serra · Brazil	26 °C	11 °C	1,715 mm	121
São Paulo · Brazil	27 °C	12 °C	1,288 mm	172
São Bernardo do Campo · Brazil	26 °C	12 °C	1,982 mm	141
Francisco Morato · Brazil	27 °C	12 °C	1,491 mm	174

Where Cotia ranks

Ranking	Position	Value
Places with the best weather in South America in August	21stof 50	94/100
Places with the best weather in South America in September	47thof 50	86/100

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

QuestionsCommon questions about Cotia’s climate

When is the best time to visit Cotia?

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

How hot does Cotia get?

In February, the warmest month, daily highs average 26 °C. About 13 days a year pass 30 °C. The highest value in the 1991–2020 record is 35 °C.

How cold does it get in winter?

Nights average 12 °C in July, the coldest month. Freezing nights are not part of a normal year here.

Which month is wettest in Cotia?

January, averaging 233 mm over 23 days with rain. The driest month is August with 37 mm. The year as a whole averages 1,331 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 Cotia 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.