Weather in Altamira

Find out everything about the climatic conditions in the city of Altamira before your trip. Below are the latest updates, detailed forecasts, and weather charts to help you better plan your day.

The climate of the city of Altamira can be described as hot and tropical, typical for this region of Brazil. There is virtually no familiar change of seasons in terms of temperature here: the thermometer stays confidently at high levels all year round, ensuring stable warmth both day and night.

Two main seasons are clearly traceable during the year, differing in the amount of rainfall. The period from January to May is a time of abundant tropical rains, when humidity reaches its maximum, and downpours can occur almost daily. Nature comes alive at this time, but tourists should be prepared for frequent inclement weather.

From June, the situation changes: a drier season arrives, lasting approximately until November. The hottest and sunniest months are August, September, and October, when rains become a rarity and the average air temperature rises to +29°C and above. This is the ideal time to visit if you wish to enjoy the bright sun and avoid constant dampness.

The climate in the city of Altamira is characterized by consistently high temperatures throughout the year, which is typical for this region. It is difficult to single out a cold season here: annual averages fluctuate insignificantly, creating an atmosphere of eternal summer. The hottest months are September and October, when the average temperature reaches +29.5°C, and daytime highs regularly exceed the +34°C mark.

Interestingly, the calendar winter (June, July, August) in Altamira feels like a period of increasing heat. During this time, the air warms up from +30°C to +33°C, and precipitation is minimal, creating conditions for dry and hot weather. Summer months (December, January, February), on the contrary, show slightly lower daytime highs — around +29°C...+30°C, however, due to high humidity and frequent rains, the sensation of warmth remains at a high level.

Daily temperature fluctuations are quite noticeable here, although nights are never cold. If the sun warms the air to +30°C and above during the day, it becomes more comfortable after sunset: night-time minimums stably hold in the range of +23°C...+25°C all year round. Such a difference between daytime heat and warm nights allows tourists to enjoy pleasant evening strolls in any season.

The weather in this region is characterized by a clear division into wet and dry seasons. If you are planning to visit the city of Altamira, be prepared for the fact that from the beginning of the year until the end of spring, a period of frequent rainfall reigns here. January is the peak month, when rains can occur almost daily — statistics indicate 30 wet days. From February to May, the situation remains similar, with the number of days with precipitation remaining high (25–29 days per month).

The second half of the year brings a significant change in weather. June becomes a transitional stage, and from July to October, the driest period is established. The most favourable months for lovers of clear skies can be called August and September, when only about 5 rainy days are recorded. By November, the frequency of precipitation begins to increase again, gradually returning the region to the wet season.

When packing for Altamira, give preference to clothing made from light natural fabrics, such as cotton or linen, which allow the skin to breathe. Since the average air temperature here remains steady around +26...+29°C all year round, the basis of your wardrobe should consist of t-shirts, shorts, light dresses, and loose trousers. Given the high humidity and tropical heat, it is better to avoid dense synthetics and choose light-coloured items to overheat less in the sun.

It is important to consider the seasonality of rainfall when planning your luggage. If you are travelling between December and May, when rains can occur almost daily (especially in January), be sure to take a high-quality raincoat, a reliable umbrella, and quick-drying shoes. In the dry season, which lasts from June to November, there is very little rainfall, and the temperature in August and September can reach +34°C. At this time, sun protection is critical: do not forget a wide-brimmed hat and sunglasses.

Regardless of the time of year, put comfortable walking shoes in your suitcase: sandals for city walks and closed trainers for nature trips. Mandatory items on your list should be sunscreen with a high protection factor and insect repellents, as insects in this region of Brazil can be quite active. It is also recommended to take one light long-sleeved top or a windbreaker: it will come in handy on a cool evening or serve as additional protection against mosquitoes.