Guarulhos climate

Name: Guarulhos
Address: BR

Guarulhos is warmest in February, with average highs of 27 °C, and coldest in July, when nights average 12 °C. January is the wettest month (236 mm) and August the driest (39 mm). Figures are 1991–2020 climate normals.

Across a full year Guarulhos averages 1,383 mm of rain and 163 days above 25 °C.

Brazil · population 1,345,364 · 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 27 °C
Coldest month July 12 °C
Driest month August 39 mm
Wettest month January 236 mm
Least cloud August 53 % cloud
Hottest on record October 37 °C
Coldest on record June 1.6 °C

What to expectGuarulhos through the year

Guarulhos has a clear annual cycle: average daily highs run from 21 °C in July to 27 °C in February, a swing of 6.1 °C in mean temperature across the year.

Counted across a normal year, 163 days a year reach 25 °C, 16 of them reach 30 °C. The warmest reading in the 1991–2020 record is 37 °C, in October.

Rain is strongly seasonal. January averages 236 mm against 39 mm in August — 6.1 times as much. Planning around the dry months matters more here than planning around temperature.

Month by month

Month	Avg high	Rainfall	Cloud
January	26.3 °C	236 mm	79 %
February	26.7 °C	183 mm	75 %
March	25.7 °C	154 mm	72 %
April	24.5 °C	65 mm	67 %
May	22.0 °C	65 mm	64 %
June	21.5 °C	47 mm	57 %
July	21.5 °C	55 mm	54 %
August	22.8 °C	39 mm	53 %
September	24.1 °C	90 mm	64 %
October	24.9 °C	116 mm	75 %
November	24.7 °C	152 mm	76 %
December	25.9 °C	182 mm	77 %

Temperature month by month

Month	Avg high	Avg low	Mean	Record high	Record low	Days above 25 °C	Days above 30 °C
January	26.3 °C	18.8 °C	22.0 °C	33.1 °C	12.4 °C	21	3
February	26.7 °C	19.0 °C	22.3 °C	33.5 °C	12.3 °C	21	2
March	25.7 °C	18.2 °C	21.3 °C	31.9 °C	12.6 °C	19	1
April	24.5 °C	16.7 °C	19.9 °C	30.9 °C	8.5 °C	14	0
May	22.0 °C	14.1 °C	17.4 °C	29.0 °C	6.3 °C	6	0
June	21.5 °C	12.8 °C	16.5 °C	27.8 °C	1.6 °C	3	0
July	21.5 °C	12.1 °C	16.1 °C	29.5 °C	2.7 °C	5	0
August	22.8 °C	12.7 °C	17.1 °C	32.7 °C	3.9 °C	11	0
September	24.1 °C	14.4 °C	18.5 °C	34.1 °C	4.7 °C	13	4
October	24.9 °C	15.9 °C	19.7 °C	36.7 °C	8.6 °C	15	4
November	24.7 °C	16.6 °C	20.1 °C	34.1 °C	9.2 °C	14	1
December	25.9 °C	18.1 °C	21.4 °C	31.9 °C	10.9 °C	20	2

Rain, sun and wind month by month

Month	Rainfall	Wet days	Daylight	Cloud cover	Humidity	Wind
January	236 mm	24	13 h/day	79 %	84 %	16 km/h
February	183 mm	21	13 h/day	75 %	84 %	16 km/h
March	154 mm	20	12 h/day	72 %	85 %	15 km/h
April	65 mm	10	12 h/day	67 %	84 %	15 km/h
May	65 mm	8	11 h/day	64 %	82 %	15 km/h
June	47 mm	6	11 h/day	57 %	80 %	15 km/h
July	55 mm	5	11 h/day	54 %	78 %	15 km/h
August	39 mm	5	11 h/day	53 %	77 %	16 km/h
September	90 mm	10	12 h/day	64 %	78 %	17 km/h
October	116 mm	15	13 h/day	75 %	81 %	17 km/h
November	152 mm	17	13 h/day	76 %	83 %	18 km/h
December	182 mm	21	14 h/day	77 %	84 %	17 km/h

How Guarulhos 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
Guarulhos	27 °C	12 °C	1,383 mm	163
São Paulo · Brazil	27 °C	12 °C	1,288 mm	172
Itaquaquecetuba · Brazil	27 °C	12 °C	1,448 mm	169
São Bernardo do Campo · Brazil	26 °C	12 °C	1,982 mm	141
Francisco Morato · Brazil	27 °C	12 °C	1,491 mm	174
Taboão da Serra · Brazil	26 °C	12 °C	1,704 mm	153
Barueri · Brazil	27 °C	12 °C	1,320 mm	178

Where Guarulhos ranks

Ranking	Position	Value
Places with the best weather in South America in August	22ndof 50	94/100

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

QuestionsCommon questions about Guarulhos’s climate

When is the best time to visit Guarulhos?

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 Guarulhos get?

In February, the warmest month, daily highs average 27 °C. About 16 days a year pass 30 °C. The highest value in the 1991–2020 record is 37 °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 Guarulhos?

January, averaging 236 mm over 24 days with rain. The driest month is August with 39 mm. The year as a whole averages 1,383 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 Guarulhos 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.