Itajaí climate

Name: Itajaí
Address: BR

Itajaí is warmest in February, with average highs of 27 °C, and coldest in July, when nights average 14 °C. January is the wettest month (210 mm) and July the driest (98 mm). Figures are 1991–2020 climate normals.

Across a full year Itajaí averages 1,664 mm of rain and 131 days above 25 °C.

Brazil · population 294,850 · 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 14 °C
Driest month July 98 mm
Wettest month January 210 mm
Least cloud May 60 % cloud
Hottest on record January 37 °C
Coldest on record July 4.7 °C
Warmest sea February 27 °C

What to expectItajaí through the year

Itajaí has a clear annual cycle: average daily highs run from 19 °C in July to 27 °C in February, a swing of 8.5 °C in mean temperature across the year.

Counted across a normal year, 131 days a year reach 25 °C, 10 of them reach 30 °C. The warmest reading in the 1991–2020 record is 37 °C, in January.

Rain is strongly seasonal. January averages 210 mm against 98 mm in July — 2.1 times as much. Planning around the dry months matters more here than planning around temperature.

The sea off Itajaí is warmest in February at 27 °C and coldest in August at 18 °C. Sea temperature lags the air by a month or two, which is why late summer swims warmer than early summer at the same air temperature.

Month by month

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 %

Temperature month by month

Month	Avg high	Avg low	Mean	Record high	Record low	Days above 25 °C	Days above 30 °C
January	27.3 °C	22.6 °C	24.7 °C	37.2 °C	16.6 °C	26	3
February	27.4 °C	22.7 °C	24.8 °C	35.7 °C	15.6 °C	25	3
March	26.6 °C	21.9 °C	24.0 °C	33.6 °C	14.5 °C	24	2
April	24.9 °C	19.9 °C	22.2 °C	30.9 °C	11.5 °C	14	0
May	22.1 °C	17.0 °C	19.4 °C	30.3 °C	8.5 °C	3	0
June	20.3 °C	15.1 °C	17.4 °C	28.1 °C	6.6 °C	1	0
July	19.4 °C	14.0 °C	16.4 °C	27.3 °C	4.7 °C	1	0
August	19.9 °C	14.6 °C	16.9 °C	30.7 °C	4.7 °C	1	0
September	20.9 °C	16.2 °C	18.3 °C	30.1 °C	7.9 °C	2	0
October	22.6 °C	18.2 °C	20.2 °C	34.4 °C	12.2 °C	4	0
November	24.2 °C	19.6 °C	21.7 °C	31.9 °C	12.8 °C	10	0
December	26.2 °C	21.5 °C	23.6 °C	34.0 °C	14.9 °C	21	2

Rain, sun and wind month by month

Month	Rainfall	Wet days	Daylight	Cloud cover	Humidity	Wind	Sea temp
January	210 mm	22	14 h/day	72 %	83 %	17 km/h	26.3 °C
February	196 mm	19	13 h/day	71 %	84 %	16 km/h	26.5 °C
March	145 mm	19	12 h/day	66 %	83 %	15 km/h	25.9 °C
April	98 mm	12	11 h/day	61 %	82 %	15 km/h	24.5 °C
May	113 mm	11	11 h/day	60 %	82 %	14 km/h	22.1 °C
June	111 mm	10	10 h/day	63 %	84 %	13 km/h	20.0 °C
July	98 mm	10	11 h/day	62 %	85 %	13 km/h	18.4 °C
August	98 mm	10	11 h/day	64 %	85 %	14 km/h	18.2 °C
September	153 mm	13	12 h/day	72 %	83 %	16 km/h	19.3 °C
October	146 mm	15	13 h/day	78 %	83 %	17 km/h	20.9 °C
November	142 mm	16	13 h/day	72 %	81 %	18 km/h	22.9 °C
December	154 mm	18	14 h/day	72 %	82 %	17 km/h	24.9 °C

How Itajaí 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
Itajaí	27 °C	14 °C	1,664 mm	131
Blumenau · Brazil	28 °C	13 °C	1,744 mm	169
Jaraguá do Sul · Brazil	28 °C	13 °C	1,767 mm	172
Joinville · Brazil	28 °C	13 °C	1,897 mm	168
Florianópolis · Brazil	28 °C	14 °C	1,658 mm	138
São José · Brazil	28 °C	13 °C	1,666 mm	151
Palhoça · Brazil	28 °C	13 °C	1,730 mm	154

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

QuestionsCommon questions about Itajaí’s climate

When is the best time to visit Itajaí?

That depends on what you want, so the honest answer is a comparison rather than a single month. May, 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 Itajaí get?

In February, the warmest month, daily highs average 27 °C. About 10 days a year pass 30 °C. The highest value in the 1991–2020 record is 37 °C.

How cold does it get in winter?

Nights average 14 °C in July, the coldest month. Freezing nights are not part of a normal year here.

Which month is wettest in Itajaí?

January, averaging 210 mm over 22 days with rain. The driest month is July with 98 mm. The year as a whole averages 1,664 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 Itajaí 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
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.