Petrópolis climate

Name: Petrópolis
Address: BR

Petrópolis is warmest in February, with average highs of 27 °C, and coldest in July, when nights average 13 °C. January is the wettest month (317 mm) and July the driest (47 mm). Figures are 1991–2020 climate normals.

Across a full year Petrópolis averages 1,966 mm of rain and 154 days above 25 °C.

Brazil · population 294,926 · 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 13 °C
Driest month July 47 mm
Wettest month January 317 mm
Least cloud August 46 % cloud
Hottest on record October 35 °C
Coldest on record July 5.0 °C

What to expectPetrópolis through the year

Petrópolis has a clear annual cycle: average daily highs run from 21 °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, 154 days a year reach 25 °C, 16 of them reach 30 °C. The warmest reading in the 1991–2020 record is 35 °C, in October.

Rain is strongly seasonal. January averages 317 mm against 47 mm in July — 6.7 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	317 mm	75 %
February	27.2 °C	230 mm	67 %
March	25.7 °C	255 mm	69 %
April	24.1 °C	119 mm	60 %
May	21.8 °C	79 mm	56 %
June	21.5 °C	48 mm	49 %
July	21.2 °C	47 mm	47 %
August	22.3 °C	54 mm	46 %
September	23.6 °C	98 mm	59 %
October	24.6 °C	151 mm	70 %
November	24.4 °C	268 mm	77 %
December	25.9 °C	299 mm	76 %

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	19.5 °C	22.5 °C	33.5 °C	14.7 °C	23	4
February	27.2 °C	19.5 °C	22.7 °C	32.9 °C	14.7 °C	23	4
March	25.7 °C	18.9 °C	21.7 °C	32.1 °C	13.3 °C	19	1
April	24.1 °C	17.3 °C	20.1 °C	30.2 °C	9.6 °C	12	0
May	21.8 °C	14.7 °C	17.7 °C	28.9 °C	9.1 °C	5	0
June	21.5 °C	13.6 °C	16.9 °C	27.7 °C	6.3 °C	3	0
July	21.2 °C	13.1 °C	16.5 °C	29.3 °C	5.0 °C	3	0
August	22.3 °C	13.5 °C	17.2 °C	30.8 °C	6.5 °C	8	0
September	23.6 °C	15.1 °C	18.7 °C	34.1 °C	7.5 °C	12	2
October	24.6 °C	16.6 °C	20.0 °C	35.1 °C	10.3 °C	15	3
November	24.4 °C	17.4 °C	20.3 °C	33.6 °C	10.5 °C	13	1
December	25.9 °C	18.8 °C	21.8 °C	33.0 °C	11.0 °C	19	2

Rain, sun and wind month by month

Month	Rainfall	Wet days	Daylight	Cloud cover	Humidity	Wind
January	317 mm	23	13 h/day	75 %	81 %	9.2 km/h
February	230 mm	19	13 h/day	67 %	80 %	9.0 km/h
March	255 mm	23	12 h/day	69 %	84 %	8.3 km/h
April	119 mm	15	12 h/day	60 %	83 %	8.4 km/h
May	79 mm	11	11 h/day	56 %	83 %	8.3 km/h
June	48 mm	7	11 h/day	49 %	81 %	8.5 km/h
July	47 mm	7	11 h/day	47 %	80 %	8.9 km/h
August	54 mm	8	11 h/day	46 %	78 %	9.6 km/h
September	98 mm	11	12 h/day	59 %	78 %	10 km/h
October	151 mm	15	13 h/day	70 %	80 %	10 km/h
November	268 mm	21	13 h/day	77 %	83 %	9.9 km/h
December	299 mm	24	14 h/day	76 %	83 %	9.6 km/h

How Petrópolis 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
Petrópolis	27 °C	13 °C	1,966 mm	154
Magé · Brazil	31 °C	16 °C	1,588 mm	260
Teresópolis · Brazil	26 °C	13 °C	2,028 mm	127
Duque de Caxias · Brazil	31 °C	16 °C	1,613 mm	271
São João de Meriti · Brazil	32 °C	16 °C	1,633 mm	279
Nova Iguaçu · Brazil	32 °C	16 °C	1,386 mm	277
Itaboraí · Brazil	31 °C	16 °C	1,630 mm	253

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

QuestionsCommon questions about Petrópolis’s climate

When is the best time to visit Petrópolis?

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 July the driest. The month-by-month table above has the full picture.

How hot does Petrópolis 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 35 °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 Petrópolis?

January, averaging 317 mm over 23 days with rain. The driest month is July with 47 mm. The year as a whole averages 1,966 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 Petrópolis 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: -22.505°, -43.179° (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.