São Carlos climate

Name: São Carlos
Address: BR

São Carlos is warmest in October, with average highs of 28 °C, and coldest in July, when nights average 13 °C. January is the wettest month (255 mm) and August the driest (25 mm). Figures are 1991–2020 climate normals.

Across a full year São Carlos averages 1,350 mm of rain and 231 days above 25 °C.

Brazil · population 266,427 · 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 October 28 °C
Coldest month July 13 °C
Driest month August 25 mm
Wettest month January 255 mm
Least cloud August 31 % cloud
Hottest on record October 38 °C
Coldest on record June 1.5 °C

What to expectSão Carlos through the year

São Carlos has a clear annual cycle: average daily highs run from 23 °C in July to 28 °C in October, a swing of 5.2 °C in mean temperature across the year.

Counted across a normal year, 231 days a year reach 25 °C, 28 of them reach 30 °C. The warmest reading in the 1991–2020 record is 38 °C, in October.

Rain is strongly seasonal. January averages 255 mm against 25 mm in August — 10 times as much. Planning around the dry months matters more here than planning around temperature.

Month by month

Month	Avg high	Rainfall	Cloud
January	26.8 °C	255 mm	77 %
February	27.1 °C	179 mm	70 %
March	26.5 °C	154 mm	61 %
April	25.8 °C	63 mm	46 %
May	23.4 °C	53 mm	45 %
June	23.0 °C	35 mm	38 %
July	23.4 °C	26 mm	34 %
August	25.6 °C	25 mm	31 %
September	27.5 °C	64 mm	42 %
October	27.8 °C	113 mm	60 %
November	26.8 °C	167 mm	64 %
December	26.9 °C	216 mm	72 %

Temperature month by month

Month	Avg high	Avg low	Mean	Record high	Record low	Days above 25 °C	Days above 30 °C
January	26.8 °C	19.3 °C	22.6 °C	34.8 °C	14.1 °C	24	3
February	27.1 °C	19.2 °C	22.7 °C	35.0 °C	14.6 °C	24	2
March	26.5 °C	18.6 °C	22.1 °C	32.4 °C	13.8 °C	24	1
April	25.8 °C	16.9 °C	21.0 °C	31.6 °C	7.9 °C	20	0
May	23.4 °C	14.1 °C	18.4 °C	29.6 °C	6.6 °C	9	0
June	23.0 °C	12.9 °C	17.5 °C	28.8 °C	1.5 °C	6	0
July	23.4 °C	12.6 °C	17.6 °C	29.1 °C	2.7 °C	9	0
August	25.6 °C	13.6 °C	19.2 °C	32.7 °C	3.2 °C	20	2
September	27.5 °C	16.0 °C	21.3 °C	36.7 °C	6.2 °C	23	8
October	27.8 °C	17.6 °C	22.2 °C	37.7 °C	8.8 °C	24	8
November	26.8 °C	17.9 °C	21.9 °C	35.6 °C	10.9 °C	23	3
December	26.9 °C	18.9 °C	22.4 °C	33.2 °C	13.4 °C	26	2

Rain, sun and wind month by month

Month	Rainfall	Wet days	Daylight	Cloud cover	Humidity	Wind
January	255 mm	23	13 h/day	77 %	81 %	14 km/h
February	179 mm	19	13 h/day	70 %	80 %	14 km/h
March	154 mm	19	12 h/day	61 %	80 %	14 km/h
April	63 mm	9	12 h/day	46 %	75 %	14 km/h
May	53 mm	6	11 h/day	45 %	73 %	14 km/h
June	35 mm	4	11 h/day	38 %	71 %	14 km/h
July	26 mm	3	11 h/day	34 %	65 %	15 km/h
August	25 mm	3	11 h/day	31 %	59 %	16 km/h
September	64 mm	8	12 h/day	42 %	60 %	17 km/h
October	113 mm	13	13 h/day	60 %	68 %	17 km/h
November	167 mm	17	13 h/day	64 %	74 %	16 km/h
December	216 mm	22	13 h/day	72 %	79 %	15 km/h

How São Carlos 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
São Carlos	28 °C	13 °C	1,350 mm	231
Araraquara · Brazil	29 °C	14 °C	1,391 mm	277
Limeira · Brazil	29 °C	13 °C	1,515 mm	273
Piracicaba · Brazil	29 °C	13 °C	1,300 mm	276
Ribeirão Preto · Brazil	30 °C	14 °C	1,327 mm	317
Santa Bárbara d'Oeste · Brazil	29 °C	13 °C	1,374 mm	267
Mogi Guaçu · Brazil	29 °C	12 °C	1,411 mm	275

Where São Carlos ranks

Ranking	Position	Value
Places with the best weather in South America in July	2ndof 50	97/100
Places with the best weather in South America in June	5thof 50	96/100
Places with the best weather in the world in July	8thof 50	97/100
Places with the best weather in South America in May	11thof 50	94/100
Places with the best weather in the world in June	23rdof 50	96/100
Places with the best weather in South America in August	24thof 50	94/100

Planning a trip? See the best time to visit São Carlos.

QuestionsCommon questions about São Carlos’s climate

When is the best time to visit São Carlos?

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

How hot does São Carlos get?

In October, the warmest month, daily highs average 28 °C. About 28 days a year pass 30 °C. The highest value in the 1991–2020 record is 38 °C.

How cold does it get in winter?

Nights average 13 °C in July, the coldest month. Freezing nights are not part of a normal year here.

Which month is wettest in São Carlos?

January, averaging 255 mm over 23 days with rain. The driest month is August with 25 mm. The year as a whole averages 1,350 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 São Carlos 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.