Monthly Climate
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Best time to visit Itajaí

June is the best time to visit Itajaí for general sightseeing, with average highs of 20 °C and about 10 wet days. The comfortable season runs roughly April to October. The sea stays above 20 °C from October to June.

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 June comfort 86/100
A beach holiday April sea 25 °C
The least cloud May 60 % average cloud cover
The least rain July 98 mm
Warmth February 27 °C
Cooler weather July 19 °C

Ranked by comfort

# Month Comfort / 100 Avg high Wet days Beach
1 June 86 20 °C 10 55
2 August 85 20 °C 10 47
3 May 85 22 °C 11 65
4 July 84 19 °C 10 45
5 September 82 21 °C 13 48
6 April 78 25 °C 12 78
7 October 78 23 °C 15 55
8 November 73 24 °C 16 67
9 December 64 26 °C 18 74
10 March 62 27 °C 19 75
11 February 57 27 °C 19 75
12 January 56 27 °C 22 75

For a beach holiday

April scores highest, with a sea temperature of 25 °C and air temperatures around 25 °C. The sea is above 20 °C from October to June.

Month Sea Air Sunshine Beach score
January 26 °C 27 °C 72 % 75
February 27 °C 27 °C 71 % 75
March 26 °C 27 °C 66 % 75
April 25 °C 25 °C 61 % 78
May 22 °C 22 °C 60 % 65
June 20 °C 20 °C 63 % 55
July 18 °C 19 °C 62 % 45
August 18 °C 20 °C 64 % 47
September 19 °C 21 °C 72 % 48
October 21 °C 23 °C 78 % 55
November 23 °C 24 °C 72 % 67
December 25 °C 26 °C 72 % 74

When to think twice

January scores lowest with about 22 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 27.3 °C 210 mm 72 %
February 27.4 °C 196 mm 71 %
March 26.6 °C 145 mm 66 %
April 24.9 °C 98 mm 61 %
May 22.1 °C 113 mm 60 %
June 20.3 °C 111 mm 63 %
July 19.4 °C 98 mm 62 %
August 19.9 °C 98 mm 64 %
September 20.9 °C 153 mm 72 %
October 22.6 °C 146 mm 78 %
November 24.2 °C 142 mm 72 %
December 26.2 °C 154 mm 72 %

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.