Climate Insights for Altamira

The climate in Altamira is temperate. The average annual temperature is 17°C and approximately 542mm of precipitation falls per year. September is the wettest month, receiving around 130mm of rainfall. Altamira is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: May, June, April. The coldest months are January, December, February, when temperatures can drop to 4°C.

Temperatures in Altamira vary considerably across the year, with a 25°C difference between the coldest and warmest months. The warmest month is May, when average highs reach 29°C and the mean temperature sits around 21°C. January is the coolest month, with minimum temperatures around 4°C and an average of 11°C. On average, daily temperatures fluctuate by about 14°C between overnight lows and afternoon highs. The sharpest temperature change occurs between January and February, with a 3°C shift in average temperatures.

Altamira is a relatively dry area, receiving approximately 542mm of precipitation annually, which averages out to around 45mm per month. The wettest month is September, averaging 130mm of rainfall. July and August also tend to see above-average precipitation. The driest month is April, with just 7mm. That's 123mm less than September, the wettest month. Rainfall is heavily concentrated in certain months, creating a distinct wet and dry season. Visitors should plan around these patterns, as the difference between peak and low months is dramatic.

Altamira is relatively calm, with an average annual wind speed of 3km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is April, averaging 3km/h, though still comfortable for most outdoor activities. The calmest conditions occur in July, with average winds dropping to 2km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 1km/h gap between the calmest and windiest months.

It is currently summer in Altamira, which began on June 21, 2026. Altamira is in the Northern Hemisphere, where spring begins in March, summer in June, autumn in September, and winter in December. The warmest period peaks in May at around 29°C, while the coldest stretch bottoms out in January near 4°C. Autumn is next, beginning on September 23, 2026 — 90 days from now.

The best time to visit Altamira is during March, April, May, June, August and October, when the weather is most comfortable for travellers. During these months, average temperatures hover around 19°C with modest rainfall averaging 38mm per month. By contrast, January can be quite cold with temperatures dropping to 4°C. A light rain jacket is recommended, though showers are generally brief and shouldn't disrupt your plans.

The table below shows monthly climate averages for Altamira based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.