Monthly Climate
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Best time to visit Niterói

July is the best time to visit Niterói for general sightseeing, with average highs of 25 °C and about 7 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 July comfort 88/100
A beach holiday June sea 23 °C
The least cloud August 42 % average cloud cover
The least rain August 45 mm
Warmth February 31 °C
Cooler weather July 25 °C

Ranked by comfort

# Month Comfort / 100 Avg high Wet days Beach
1 July 88 25 °C 7 82
2 June 87 25 °C 7 85
3 August 86 26 °C 7 82
4 May 80 26 °C 10 82
5 September 78 27 °C 11 76
6 October 70 28 °C 13 73
7 April 67 28 °C 13 79
8 November 62 28 °C 18 71
9 December 53 30 °C 19 72
10 March 52 30 °C 19 73
11 February 51 31 °C 17 68
12 January 48 31 °C 19 70

For a beach holiday

June scores highest, with a sea temperature of 23 °C and air temperatures around 25 °C. The sea never reaches 20 °C here.

Month Sea Air Sunshine Beach score
January 25 °C 31 °C 70 % 70
February 25 °C 31 °C 61 % 68
March 25 °C 30 °C 63 % 73
April 25 °C 28 °C 52 % 79
May 24 °C 26 °C 50 % 82
June 23 °C 25 °C 44 % 85
July 22 °C 25 °C 43 % 82
August 21 °C 26 °C 42 % 82
September 21 °C 27 °C 55 % 76
October 22 °C 28 °C 65 % 73
November 23 °C 28 °C 72 % 71
December 24 °C 30 °C 70 % 72

When to think twice

January scores lowest with about 19 wet days and highs near 31 °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 30.7 °C 234 mm 70 %
February 31.1 °C 176 mm 61 %
March 29.6 °C 202 mm 63 %
April 28.0 °C 101 mm 52 %
May 25.6 °C 78 mm 50 %
June 25.2 °C 47 mm 44 %
July 24.9 °C 50 mm 43 %
August 25.8 °C 45 mm 42 %
September 26.7 °C 86 mm 55 %
October 27.9 °C 109 mm 65 %
November 28.0 °C 200 mm 72 %
December 29.6 °C 221 mm 70 %

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.