Jundiaí climate

Name: Jundiaí
Address: BR

Jundiaí is warmest in February, with average highs of 27 °C, and coldest in July, when nights average 12 °C. January is the wettest month (246 mm) and August the driest (36 mm). Figures are 1991–2020 climate normals.

Across a full year Jundiaí averages 1,360 mm of rain and 196 days above 25 °C.

Brazil · population 443,221 · 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 36 mm
Wettest month January 246 mm
Least cloud August 44 % cloud
Hottest on record October 38 °C
Coldest on record June 1.6 °C

What to expectJundiaí through the year

Jundiaí has a clear annual cycle: average daily highs run from 22 °C in July to 27 °C in February, a swing of 6.2 °C in mean temperature across the year.

Counted across a normal year, 196 days a year reach 25 °C, 21 of them reach 30 °C. The warmest reading in the 1991–2020 record is 38 °C, in October.

Rain is strongly seasonal. January averages 246 mm against 36 mm in August — 6.8 times as much. Planning around the dry months matters more here than planning around temperature.

Month by month

Month	Avg high	Rainfall	Cloud
January	26.9 °C	246 mm	76 %
February	27.2 °C	173 mm	70 %
March	26.3 °C	135 mm	64 %
April	25.2 °C	65 mm	56 %
May	22.7 °C	64 mm	55 %
June	22.1 °C	48 mm	49 %
July	22.2 °C	47 mm	46 %
August	23.9 °C	36 mm	44 %
September	25.5 °C	85 mm	54 %
October	26.2 °C	119 mm	67 %
November	25.9 °C	150 mm	68 %
December	26.8 °C	192 mm	71 %

Temperature month by month

Month	Avg high	Avg low	Mean	Record high	Record low	Days above 25 °C	Days above 30 °C
January	26.9 °C	19.0 °C	22.5 °C	35.5 °C	12.3 °C	24	3
February	27.2 °C	19.0 °C	22.6 °C	36.2 °C	13.9 °C	23	2
March	26.3 °C	18.3 °C	21.7 °C	31.0 °C	13.2 °C	23	1
April	25.2 °C	16.7 °C	20.4 °C	30.7 °C	6.6 °C	17	0
May	22.7 °C	13.9 °C	17.8 °C	29.1 °C	5.8 °C	7	0
June	22.1 °C	12.4 °C	16.8 °C	27.7 °C	1.6 °C	4	0
July	22.2 °C	11.7 °C	16.5 °C	29.0 °C	1.7 °C	6	0
August	23.9 °C	12.6 °C	17.7 °C	32.1 °C	3.7 °C	14	1
September	25.5 °C	14.8 °C	19.5 °C	35.1 °C	4.0 °C	17	5
October	26.2 °C	16.4 °C	20.8 °C	38.1 °C	9.0 °C	19	5
November	25.9 °C	17.0 °C	20.9 °C	35.5 °C	10.1 °C	19	2
December	26.8 °C	18.3 °C	22.1 °C	33.9 °C	11.3 °C	24	2

Rain, sun and wind month by month

Month	Rainfall	Wet days	Daylight	Cloud cover	Humidity	Wind
January	246 mm	22	13 h/day	76 %	83 %	16 km/h
February	173 mm	19	13 h/day	70 %	83 %	15 km/h
March	135 mm	17	12 h/day	64 %	84 %	15 km/h
April	65 mm	8	12 h/day	56 %	81 %	16 km/h
May	64 mm	7	11 h/day	55 %	80 %	15 km/h
June	48 mm	5	11 h/day	49 %	78 %	15 km/h
July	47 mm	5	11 h/day	46 %	76 %	15 km/h
August	36 mm	4	11 h/day	44 %	73 %	16 km/h
September	85 mm	9	12 h/day	54 %	73 %	18 km/h
October	119 mm	13	13 h/day	67 %	77 %	18 km/h
November	150 mm	16	13 h/day	68 %	80 %	18 km/h
December	192 mm	20	14 h/day	71 %	82 %	17 km/h

How Jundiaí 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
Jundiaí	27 °C	12 °C	1,360 mm	196
Francisco Morato · Brazil	27 °C	12 °C	1,491 mm	174
Barueri · Brazil	27 °C	12 °C	1,320 mm	178
Campinas · Brazil	28 °C	13 °C	1,405 mm	239
Itu · Brazil	28 °C	13 °C	1,310 mm	229
Bragança Paulista · Brazil	27 °C	12 °C	1,379 mm	182
Cotia · Brazil	26 °C	12 °C	1,331 mm	155

Where Jundiaí ranks

Ranking	Position	Value
Places with the best weather in South America in July	36th of 50	94/100
Places with the best weather in South America in May	38th of 50	92/100
Places with the best weather in South America in June	39th of 50	94/100

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

QuestionsCommon questions about Jundiaí’s climate

When is the best time to visit Jundiaí?

That depends on what you want, so the honest answer is a comparison rather than a single month. April, September, October 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 Jundiaí get?

In February, the warmest month, daily highs average 27 °C. About 21 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 12 °C in July, the coldest month. Freezing nights are not part of a normal year here.

Which month is wettest in Jundiaí?

January, averaging 246 mm over 22 days with rain. The driest month is August with 36 mm. The year as a whole averages 1,360 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 Jundiaí 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
Data point: -23.186°, -46.884° (the coordinates the reanalysis values are taken for)
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.