Guarujá climate

Name: Guarujá
Address: BR

Guarujá is warmest in February, with average highs of 29 °C, and coldest in July, when nights average 17 °C. January is the wettest month (229 mm) and August the driest (93 mm). Figures are 1991–2020 climate normals.

Across a full year Guarujá averages 1,861 mm of rain and 208 days above 25 °C.

Brazil · population 294,871 · 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 29 °C
Coldest month July 17 °C
Driest month August 93 mm
Wettest month January 229 mm
Least cloud July 50 % cloud
Hottest on record September 39 °C
Coldest on record July 8.6 °C
Warmest sea February 27 °C

What to expectGuarujá through the year

Guarujá has a clear annual cycle: average daily highs run from 23 °C in July to 29 °C in February, a swing of 6.4 °C in mean temperature across the year.

Counted across a normal year, 208 days a year reach 25 °C, 39 of them reach 30 °C. The warmest reading in the 1991–2020 record is 39 °C, in September.

Rain is strongly seasonal. January averages 229 mm against 93 mm in August — 2.5 times as much. Planning around the dry months matters more here than planning around temperature.

The sea off Guarujá is warmest in February at 27 °C and coldest in August at 21 °C. Sea temperature lags the air by a month or two, which is why late summer swims warmer than early summer at the same air temperature.

Month by month

Month	Avg high	Rainfall	Cloud
January	28.4 °C	229 mm	73 %
February	28.7 °C	202 mm	67 %
March	27.7 °C	222 mm	63 %
April	26.6 °C	130 mm	55 %
May	24.4 °C	124 mm	54 %
June	23.7 °C	97 mm	51 %
July	23.2 °C	115 mm	50 %
August	23.4 °C	93 mm	51 %
September	23.9 °C	140 mm	63 %
October	24.9 °C	156 mm	71 %
November	25.7 °C	173 mm	69 %
December	27.4 °C	180 mm	70 %

Temperature month by month

Month	Avg high	Avg low	Mean	Record high	Record low	Days above 25 °C	Days above 30 °C
January	28.4 °C	23.4 °C	25.7 °C	35.1 °C	18.2 °C	29	8
February	28.7 °C	23.6 °C	25.9 °C	34.5 °C	19.1 °C	27	8
March	27.7 °C	22.9 °C	25.0 °C	34.2 °C	18.2 °C	27	5
April	26.6 °C	21.3 °C	23.6 °C	35.2 °C	14.6 °C	22	3
May	24.4 °C	18.9 °C	21.3 °C	32.9 °C	12.5 °C	11	1
June	23.7 °C	17.6 °C	20.2 °C	31.7 °C	8.7 °C	10	1
July	23.2 °C	16.7 °C	19.5 °C	32.5 °C	8.6 °C	9	1
August	23.4 °C	16.9 °C	19.7 °C	36.5 °C	9.8 °C	9	2
September	23.9 °C	18.1 °C	20.6 °C	39.1 °C	10.1 °C	9	2
October	24.9 °C	19.6 °C	22.0 °C	36.1 °C	13.9 °C	14	2
November	25.7 °C	20.6 °C	22.9 °C	35.1 °C	14.8 °C	16	2
December	27.4 °C	22.3 °C	24.6 °C	35.6 °C	15.9 °C	25	5

Rain, sun and wind month by month

Month	Rainfall	Wet days	Daylight	Cloud cover	Humidity	Wind	Sea temp
January	229 mm	21	13 h/day	73 %	86 %	18 km/h	26.6 °C
February	202 mm	17	13 h/day	67 %	86 %	17 km/h	27.1 °C
March	222 mm	19	12 h/day	63 %	86 %	18 km/h	26.7 °C
April	130 mm	14	12 h/day	55 %	85 %	17 km/h	25.9 °C
May	124 mm	13	11 h/day	54 %	84 %	17 km/h	23.8 °C
June	97 mm	10	11 h/day	51 %	83 %	17 km/h	22.1 °C
July	115 mm	10	11 h/day	50 %	83 %	18 km/h	21.0 °C
August	93 mm	10	11 h/day	51 %	84 %	19 km/h	20.5 °C
September	140 mm	14	12 h/day	63 %	85 %	20 km/h	21.2 °C
October	156 mm	16	13 h/day	71 %	86 %	20 km/h	22.3 °C
November	173 mm	16	13 h/day	69 %	86 %	20 km/h	23.3 °C
December	180 mm	18	14 h/day	70 %	85 %	19 km/h	25.1 °C

How Guarujá 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
Guarujá	29 °C	17 °C	1,861 mm	208
Santos · Brazil	29 °C	17 °C	2,101 mm	211
Praia Grande · Brazil	29 °C	16 °C	2,135 mm	212
São Bernardo do Campo · Brazil	26 °C	12 °C	1,982 mm	141
Itaquaquecetuba · Brazil	27 °C	12 °C	1,448 mm	169
São Paulo · Brazil	27 °C	12 °C	1,288 mm	172
Guarulhos · Brazil	27 °C	12 °C	1,383 mm	163

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

QuestionsCommon questions about Guarujá’s climate

When is the best time to visit Guarujá?

That depends on what you want, so the honest answer is a comparison rather than a single month. June, July, August 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 Guarujá get?

In February, the warmest month, daily highs average 29 °C. About 39 days a year pass 30 °C. The highest value in the 1991–2020 record is 39 °C.

How cold does it get in winter?

Nights average 17 °C in July, the coldest month. Freezing nights are not part of a normal year here.

Which month is wettest in Guarujá?

January, averaging 229 mm over 21 days with rain. The driest month is August with 93 mm. The year as a whole averages 1,861 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 Guarujá 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.