Best time to visit Itajaí
Month-by-month weather averages for Itajaí.
Itajaí, Santa Catarina, Brazil
°C
mm
- Average daily high and low
- Precipitation
- Good month
- Best month
- Made good or best by an event
| Month | Average daily high | Average daily low | Precipitation | Verdict |
|---|---|---|---|---|
| January | 27.3 °C / 81 °F | 21.9 °C / 71 °F | 216 mm / 8.5 in | neither best nor good |
| February | 27.6 °C / 82 °F | 22.1 °C / 72 °F | 186 mm / 7.3 in | neither best nor good |
| March | 26.5 °C / 80 °F | 21.2 °C / 70 °F | 150 mm / 5.9 in | neither best nor good |
| April | 24.5 °C / 76 °F | 18.9 °C / 66 °F | 112 mm / 4.4 in | good month |
| May | 21.7 °C / 71 °F | 16.1 °C / 61 °F | 123 mm / 4.8 in | good month |
| June | 19.8 °C / 68 °F | 14.2 °C / 58 °F | 109 mm / 4.3 in | good month |
| July | 19.3 °C / 67 °F | 13.4 °C / 56 °F | 90 mm / 3.6 in | good month |
| August | 19.9 °C / 68 °F | 14 °C / 57 °F | 97 mm / 3.8 in | good month |
| September | 21.1 °C / 70 °F | 15.7 °C / 60 °F | 123 mm / 4.8 in | good month |
| October | 22.3 °C / 72 °F | 17.5 °C / 64 °F | 150 mm / 5.9 in | good month |
| November | 23.9 °C / 75 °F | 18.8 °C / 66 °F | 158 mm / 6.2 in | good month |
| December | 26.1 °C / 79 °F | 20.8 °C / 69 °F | 170 mm / 6.7 in | neither best nor good |
Good and best months depend on more than temperature, rain and events. How they are chosen
Each activity on this page has its own good and best months, rated on twenty years of daily weather records. Which measures count, and how much, depends on the activity: humidity for exploring outdoors, wind for the beach, hiking and skiing, snow for skiing alone. Between them, the activities are rated on:
- Daytime highs
- Night-time lows
- How warm it feels
- Humidity
- How much of the day is sunny
- Hours of daylight
- Monthly rainfall
- How many days it rains
- Days of heavy rain
- Wind
- Snowfall and days with snow
- Major events, such as festivals
The chart shows the good and best months for exploring outdoors.
The event icon marks a month that an event lifts to good or best, such as a festival or a natural spectacle. Choose “Weather only” in the toolbar to rate the months on weather alone.
Best months by activity
Exploring outdoors
Mild days and nights, mostly dry and bright. The default for 'when should I go'.
- JJanuary: neither
- FFebruary: neither
- MMarch: neither
- AApril: good
- MMay: good
- JJune: good
- JJuly: good
- AAugust: good
- SSeptember: good
- OOctober: good
- NNovember: good
- DDecember: neither
- Good
- April–November
Why these months
April · good
In its favour: feels like (high) 26.9 °C / 80 °F, average daily high 24.5 °C / 76 °F, share of daylight that is sunny 78%, precipitation 112 mm / 4.4 in, days with heavy rain 2.9 days, average daily low 18.9 °C / 66 °F.
Against: wet days 13.4 days, relative humidity 83%.
May · good
In its favour: feels like (high) 22.9 °C / 73 °F, average daily high 21.7 °C / 71 °F, share of daylight that is sunny 71%, precipitation 123 mm / 4.8 in, average daily low 16.1 °C / 61 °F, days with heavy rain 3.5 days.
Against: relative humidity 83%, wet days 12.1 days.
June · good
In its favour: feels like (high) 20.4 °C / 69 °F, average daily high 19.8 °C / 68 °F, share of daylight that is sunny 67%, precipitation 109 mm / 4.3 in, average daily low 14.2 °C / 58 °F, days with heavy rain 3.5 days, wet days 10.5 days.
Against: relative humidity 84%.
July · good
In its favour: feels like (high) 19.7 °C / 67 °F, average daily high 19.3 °C / 67 °F, share of daylight that is sunny 68%, precipitation 90 mm / 3.6 in, wet days 9.6 days, days with heavy rain 3.3 days, average daily low 13.4 °C / 56 °F.
Against: relative humidity 85%.
August · good
In its favour: feels like (high) 20.4 °C / 69 °F, average daily high 19.9 °C / 68 °F, share of daylight that is sunny 68%, precipitation 97 mm / 3.8 in, days with heavy rain 3.1 days, average daily low 14 °C / 57 °F, wet days 10.1 days.
Against: relative humidity 84%.
September · good
In its favour: feels like (high) 22.2 °C / 72 °F, average daily high 21.1 °C / 70 °F, share of daylight that is sunny 66%, precipitation 123 mm / 4.8 in, average daily low 15.7 °C / 60 °F, days with heavy rain 4.1 days.
Against: relative humidity 84%, wet days 12.4 days.
October · good
In its favour: feels like (high) 24 °C / 75 °F, average daily high 22.3 °C / 72 °F, share of daylight that is sunny 57%, average daily low 17.5 °C / 64 °F.
Against: wet days 16.7 days, precipitation 150 mm / 5.9 in, days with heavy rain 4.8 days, relative humidity 84%.
November · good
In its favour: feels like (high) 26.3 °C / 79 °F, average daily high 23.9 °C / 75 °F, share of daylight that is sunny 67%, average daily low 18.8 °C / 66 °F.
Against: precipitation 158 mm / 6.2 in, wet days 17.1 days, days with heavy rain 5.5 days, relative humidity 82%.
Hiking and trekking
Cool enough to climb in, dry enough to enjoy, long enough days.
- JJanuary: neither
- FFebruary: neither
- MMarch: neither
- AApril: neither
- MMay: good
- JJune: best
- JJuly: best
- AAugust: best
- SSeptember: good
- OOctober: neither
- NNovember: neither
- DDecember: neither
- Best
- June–August
- Good
- May, September
Why these months
May · good
In its favour: average daily high 21.7 °C / 71 °F, share of daylight that is sunny 71%, precipitation 123 mm / 4.8 in, feels like (high) 22.9 °C / 73 °F, days with heavy rain 3.5 days, wet days 12.1 days, daylight per day 10.8 h, wind (daily max) 14 km/h / 9 mph, average daily low 16.1 °C / 61 °F.
June · best
In its favour: average daily high 19.8 °C / 68 °F, precipitation 109 mm / 4.3 in, feels like (high) 20.4 °C / 69 °F, share of daylight that is sunny 67%, average daily low 14.2 °C / 58 °F, wet days 10.5 days, days with heavy rain 3.5 days, wind (daily max) 14 km/h / 8 mph, daylight per day 10.5 h.
July · best
In its favour: average daily high 19.3 °C / 67 °F, precipitation 90 mm / 3.6 in, wet days 9.6 days, feels like (high) 19.7 °C / 67 °F, average daily low 13.4 °C / 56 °F, share of daylight that is sunny 68%, days with heavy rain 3.3 days, wind (daily max) 13 km/h / 8 mph, daylight per day 10.6 h.
August · best
In its favour: average daily high 19.9 °C / 68 °F, precipitation 97 mm / 3.8 in, feels like (high) 20.4 °C / 69 °F, share of daylight that is sunny 68%, average daily low 14 °C / 57 °F, wet days 10.1 days, days with heavy rain 3.1 days, daylight per day 11.2 h, wind (daily max) 15 km/h / 9 mph.
September · good
In its favour: average daily high 21.1 °C / 70 °F, share of daylight that is sunny 66%, daylight per day 11.9 h, precipitation 123 mm / 4.8 in, feels like (high) 22.2 °C / 72 °F, average daily low 15.7 °C / 60 °F, wet days 12.4 days, wind (daily max) 16 km/h / 10 mph.
Against: days with heavy rain 4.1 days.
An activity is listed only where it applies: skiing at ski destinations, beach and swimming at beach destinations. The nearest ski area is Los Penitentes, 2140 km away.
Weather averages
Monthly averages over twenty years, 2006–2025. Highs, lows and precipitation are in the chart at the top.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Feels like (high) | 31.7 °C | 32.2 °C | 30.3 °C | 26.9 °C | 22.9 °C | 20.4 °C | 19.7 °C | 20.4 °C | 22.2 °C | 24 °C | 26.3 °C | 29.8 °C |
| Days with heavy rain | 7.3 days | 6.2 days | 5 days | 2.9 days | 3.5 days | 3.5 days | 3.3 days | 3.1 days | 4.1 days | 4.8 days | 5.5 days | 4.8 days |
| Time rain usually falls | 3 pm | 3 pm | 3 pm | 3 pm | 3 am | 6 pm | 10 pm | 5 am | 1 am | 5 pm | 3 pm | 3 pm |
| Sunshine per day | 10.2 h | 10.1 h | 9.4 h | 8.9 h | 7.7 h | 7.1 h | 7.2 h | 7.6 h | 7.9 h | 7.3 h | 9 h | 10.1 h |
| Relative humidity | 83% | 83% | 83% | 83% | 83% | 84% | 85% | 84% | 84% | 84% | 82% | 82% |
Air quality
Averaged over a shorter period (2022–2025) than the twenty-year averages above, and not counted towards good or best months.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Air pollution (PM2.5) 2022–2025 | 8.2 µg/m³ | 9 µg/m³ | 8.6 µg/m³ | 8.5 µg/m³ | 10.7 µg/m³ | 12.7 µg/m³ | 13.4 µg/m³ | 12.5 µg/m³ | 12.7 µg/m³ | 9.1 µg/m³ | 8.9 µg/m³ | 8.4 µg/m³ |
| Air pollution (PM2.5, daily peak) 2022–2025 | 12.5 µg/m³ | 14.4 µg/m³ | 13.2 µg/m³ | 13.3 µg/m³ | 16.8 µg/m³ | 20.3 µg/m³ | 21.3 µg/m³ | 19.2 µg/m³ | 19.8 µg/m³ | 13.7 µg/m³ | 13.4 µg/m³ | 13.4 µg/m³ |
- Good 15 µg/m³ or less
- Fair 15 to 25 µg/m³
- Moderate 25 to 37.5 µg/m³
- Poor 37.5 to 50 µg/m³
- Very poor 50 to 75 µg/m³
- Extremely poor over 75 µg/m³
Each figure is compared with the World Health Organization's guideline for a day's air, 15 µg/m³ or less, and with its interim targets above that. The words are ours: the WHO does not name its steps. The figures are modelled monthly averages, so single days can be well above them. The daily peak is the average of each day's highest hour, shaded on the same scale.