Itajaí climate
Itajaí (Santa Catarina, Brazil) has a humid subtropical climate (Köppen Cfa). The average temperature over the year is 22 °C71 °F, and about 1,571 mm62 in of precipitation falls in an average year.
Temperature by month
Precipitation by month
Itajaí climate table
| Month | High °C°F | Low °C°F | Mean °C°F | Precip. mmin |
|---|---|---|---|---|
| Jan | 2984 | 2373 | 2678 | 1967.7 |
| Feb | 2985 | 2373 | 2679 | 1546.1 |
| Mar | 2883 | 2271 | 2577 | 1425.6 |
| Apr | 2780 | 2067 | 2374 | 1024.0 |
| May | 2474 | 1661 | 2068 | 1134.5 |
| Jun | 2271 | 1458 | 1864 | 983.9 |
| Jul | 2170 | 1356 | 1763 | 953.7 |
| Aug | 2271 | 1457 | 1864 | 933.6 |
| Sep | 2373 | 1660 | 1967 | 1425.6 |
| Oct | 2576 | 1864 | 2170 | 1475.8 |
| Nov | 2679 | 1966 | 2373 | 1355.3 |
| Dec | 2883 | 2170 | 2576 | 1556.1 |
| Year | 2985 | 1356 | 2271 | 1,57162 |
“Year” row: highest monthly high, lowest monthly low, annual mean and annual total.
| Month | Humid. | Cloud | Solar | Daylight |
|---|---|---|---|---|
| Jan | 79% | 73% | 5.7 | 13:39 |
| Feb | 79% | 69% | 5.5 | 13:03 |
| Mar | 80% | 65% | 4.8 | 12:19 |
| Apr | 80% | 62% | 3.9 | 11:29 |
| May | 81% | 63% | 3.0 | 10:48 |
| Jun | 84% | 66% | 2.6 | 10:27 |
| Jul | 84% | 66% | 2.7 | 10:36 |
| Aug | 84% | 65% | 3.3 | 11:11 |
| Sep | 83% | 74% | 3.7 | 11:58 |
| Oct | 82% | 78% | 4.4 | 12:47 |
| Nov | 79% | 75% | 5.3 | 13:29 |
| Dec | 78% | 74% | 5.6 | 13:49 |
Humid. = average relative humidity at 2 m; cloud = average cloud amount; solar = average daily solar energy reaching the ground in kWh/m² (all-sky); daylight in hours:minutes, calculated for the 15th of each month.
What the climate of Itajaí is like
The warmest month is February, with an average high of 29 °C85 °F and a low of 23 °C73 °F. The coldest is July, when highs average 21 °C70 °F and lows 13 °C56 °F. There is a clear seasonal cycle, with 8.9 °C16 °F between the average temperature of the warmest and the coolest month.
It is wet, with about 1,571 mm62 in of precipitation per year. The wettest three-month stretch is December–February, which brings 32% of the annual total. The wettest month is January (196 mm7.7 in), the driest is August (93 mm3.6 in).
Relative humidity ranges from 78% in December to 84% in August. The clearest skies (lowest average cloud amount, 62%) are typical of April. Average wind speed near the ground ranges from 9 km/h (6 mph) in June to 13 km/h (8 mph) in November. Daylight lasts from about 10.5 hours in June to 13.8 hours in December.
Best time to visit Itajaí
Based on these averages, the most comfortable months for sightseeing and outdoor activities are May–August: average highs of 21 °C70 °F to 24 °C74 °F with 93 mm3.6 in to 113 mm4.5 in of precipitation per month.
The most challenging month is January, which is very wet (196 mm7.7 in) and humid (79% relative humidity).
Comfort score: months are ranked by how close they come to an average high of 21–28 °C (70–82 °F), lows above 5 °C (41 °F), little precipitation and moderate humidity. The best-ranked months of each place are recommended, even where none meets all of these. These are general rules of thumb applied to long-term averages.
What to pack for Itajaí
- Summer (December–February) — highs 2883 to 29 °C85 °F, lows 2170 to 23 °C73 °F, about 168 mm6.6 in of precipitation a month. Pack light summer clothes such as T-shirts, shorts or light dresses and an umbrella or light rain jacket.
- Autumn (March–May) — highs 2474 to 28 °C83 °F, lows 1661 to 22 °C71 °F, about 119 mm4.7 in of precipitation a month. Pack light summer clothes such as T-shirts, shorts or light dresses and an umbrella or light rain jacket.
- Winter (June–August) — highs 2170 to 22 °C71 °F, lows 1356 to 14 °C58 °F, about 95 mm3.7 in of precipitation a month. Pack light layers — T-shirts plus a light sweater or jacket and an umbrella or light rain jacket.
- Spring (September–November) — highs 2373 to 26 °C79 °F, lows 1660 to 19 °C66 °F, about 141 mm5.6 in of precipitation a month. Pack light summer clothes such as T-shirts, shorts or light dresses and an umbrella or light rain jacket.
How Itajaí compares
Compared with Blumenau, about 40 km to the west, Itajaí has practically the same average temperature and receives a similar amount of precipitation. The difference is largest in May (0.8 °C1.4 °F warmer).
Of the 223 places in Brazil covered by World Climates, Itajaí is the 154th warmest by annual mean temperature and the 40th wettest by annual precipitation. See all of them on the Brazil climate page.
Places in other countries with the most similar temperature and rainfall pattern: Sunshine Coast (Australia, Cfa), Posadas (Argentina, Cfa) and Ituzaingó (Argentina, Cfa).
The same NASA POWER grid cell also contains Balneário Camboriú (pop. 139,155). Their long-term averages in this dataset are essentially the same as for Itajaí, so they do not have separate pages.
Nearby places
- Brusque 33 km · 22 °C71 °F · 1,571 mm62 in
- Blumenau 40 km · 21 °C71 °F · 1,583 mm62 in
- Jaraguá do Sul 62 km · 22 °C71 °F · 1,616 mm64 in
- Joinville 70 km · 22 °C71 °F · 1,610 mm63 in
- Florianópolis 77 km · 22 °C71 °F · 1,568 mm62 in
- São José 153 km · 21 °C69 °F · 1,589 mm63 in
- Paranaguá 155 km · 22 °C71 °F · 1,879 mm74 in
- Curitiba 176 km · 18 °C64 °F · 1,630 mm64 in
Frequently asked questions
What is the warmest month in Itajaí?
February is the warmest month in Itajaí, with an average high of 29 °C (85 °F) and an average low of 23 °C (73 °F).
What is the coldest month in Itajaí?
July is the coldest month, with an average high of 21 °C (70 °F) and an average low of 13 °C (56 °F).
When does it rain the most in Itajaí?
January is the wettest month with about 196 mm (7.7 in) of precipitation; August is the driest with about 93 mm (3.6 in).
What is the best time to visit Itajaí?
Judging by long-term averages, the most comfortable months are May–August.
About this data
All figures are 25-year averages (January 2001 – December 2025) from the NASA POWER project. Temperature, humidity, wind and precipitation come from the MERRA-2 reanalysis (precipitation is the bias-corrected MERRA-2 product), cloud and solar values from CERES satellite data. They describe a grid cell of roughly 50–70 km, not a single weather station, so they can differ from airport records — most of all on coasts, in mountains and for rainfall. Average highs and lows are the monthly mean temperature plus/minus half of the average daily temperature range. Counts of rainy days are not part of this dataset.
The grid cell’s average elevation is 86 m, while Itajaí lies at about 6 m. Temperatures on this page were therefore adjusted by +0.5 °C0.9 °F using the standard lapse rate of 6.5 °C per 1,000 m.