Weather in Itanhaem

Planning your day in the city of Itanhaem? Check out the latest weather updates, forecasts, and useful charts right here.

Itanhaem in Brazil is characterized by a warm and humid climate throughout the year, which can be classified as tropical or subtropical. Temperatures here remain quite stable, with average values ranging from 18°C in the coolest months (July) to approximately 24.3°C during the warmest period (January). This creates generally comfortable conditions for visiting the city at any time of year, although the weather patterns have their own seasonal specificities.

Two main seasons are clearly traceable in Itanhaem. The summer months, roughly from December to March, are the warmest and wettest. During this time, average daytime temperatures often exceed 27°C, and a peak in rainfall is observed, resulting in a high number of rainy days – for instance, up to 27 in January. The winter period, conditionally from May to September, is distinguished by milder temperatures, averaging around 18-20°C, and is a significantly drier season. Rainfall amounts and rainy days are minimal during this time; for example, in July there is only about 2 mm of precipitation and 8 rainy days. Transitional months, such as April, October, and November, demonstrate a gradual shift in these weather conditions.

The climate in Itanhaem is distinguished by pleasant warmth year-round, albeit with noticeable seasonal fluctuations. The hottest month is usually January, when the average temperature reaches 24.3°C, and daytime highs can rise to 27.7°C. Nights during this time are also warm, with a minimum temperature around 21.0°C. Conversely, July is considered the coolest month, with an average temperature of 18.0°C. During the day in July, the air warms up to an average of 22.3°C, while at night it can drop to 13.7°C. Overall, the annual temperature regime is comfortable for visiting at any time.

The summer period in Itanhaem, which falls on the months from December to March, is characterized by warm and humid weather. Monthly average temperatures during this time range from 23.1°C in December to 24.3°C in January. Daytime peaks often reach 26-28°C, creating ideal conditions for a beach holiday, although high humidity accompanied by frequent rainfall is also a characteristic feature of this season. Nights remain very warm, with temperatures rarely dropping below 20°C.

Winter in Itanhaem, covering June, July, and August, brings milder and cooler weather. Average temperatures in these months vary from 18.0°C to 19.1°C. During the day, the thermometer usually shows a pleasant 22-23°C, while nights become noticeably fresher, with temperatures dropping to 13-15°C. In the winter months, a slightly larger difference between day and night temperatures is observed compared to summer, reaching approximately 8-9°C, which provides comfortable coolness after warm days.

In the city of Itanhaem, a clearly defined seasonality in rainfall distribution is observed throughout the year. One can distinguish a wet season, which falls predominantly on the summer months (in the Southern Hemisphere), and a drier period characteristic of winter.

The highest frequency of precipitation occurs from December to March. January and February are the wettest months: on average, about 11 mm of precipitation falls in each, and the number of rainy days reaches 27 and 25 respectively. March also remains very rainy with figures around 10 mm of precipitation and 25 days with rain. An increase in rainfall and rainy days begins as early as October (about 5 mm, 22 rainy days) and November (about 6 mm, 20 rainy days), foreshadowing the arrival of the main wet period. Judging by the large number of rainy days with a moderate total volume, the nature of precipitation at this time likely consists of frequent but not too heavy rains or drizzle.

The dry season in Itanhaem lasts approximately from May to September. The driest month is July, when the monthly average rainfall is only about 2 mm, and there are only about 8 rainy days. June is also distinguished by a small amount of precipitation (about 3 mm) and a small number of rainy days (about 10). During these months, the probability of catching prolonged sunny weather is significantly higher than in other periods of the year.

When planning a trip to Itanhaem, it is worth considering its warm and humid climate. For most of the year, you will need light, breathable clothing: T-shirts, shorts, sundresses, and skirts made from natural fabrics. Do not forget swimwear, as the weather often invites you to relax by the water. Be sure to bring high SPF sunscreen, sunglasses, and a hat for protection against the active sun. Comfortable footwear, such as sandals or light trainers, will make your walks around the city comfortable.

Itanhaem experiences marked seasonality in rainfall. From January to March, as well as from October to December, the number of rainy days increases significantly, so a compact umbrella or a light raincoat will become your indispensable companions. Despite the fact that the temperature remains high year-round (average values range from 18°C in July to 24.3°C in January), in the cooler months such as June, July, and August, when the minimum temperature can drop to 13-15°C, a light sweater, cardigan, or windbreaker will come in handy for evening walks. The principle of layering your clothes will help you easily adapt to possible weather changes throughout the day.