Monthly Climate
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Best time to visit Petrópolis

August is the best time to visit Petrópolis for general sightseeing, with average highs of 22 °C and about 8 wet days. The comfortable season runs roughly May to September.

It depends what you are going for

One month rarely wins on everything. These are the best months on each measure taken on its own.

If you want Best month On that measure
Sightseeing and walking August comfort 91/100
The least cloud August 46 % average cloud cover
The least rain July 47 mm
Warmth February 27 °C
Cooler weather July 21 °C

Ranked by comfort

# Month Comfort / 100 Avg high Wet days
1 August 91 22 °C 8
2 July 91 21 °C 7
3 June 91 21 °C 7
4 September 86 24 °C 11
5 May 85 22 °C 11
6 April 78 24 °C 15
7 October 78 25 °C 15
8 November 71 24 °C 21
9 March 66 26 °C 23
10 December 66 26 °C 24
11 February 64 27 °C 19
12 January 63 27 °C 23

When to think twice

January scores lowest with about 23 wet days and highs near 27 °C. That does not make it a bad month — it depends entirely on what you are travelling for. The numbers are all here; the judgement is yours.

The full year

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 %

Data sources and method

Normal period
1991–2020
Dataset version
era5-1991-2020-scores1.1
Last processed

Measured values come from ERA5 reanalysis and are reproduced unchanged. Calculated by us: comfort score, beach score, season boundaries. 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.