Climate Overview
The climate in Santarém is hot. The average annual temperature is 28°C and approximately 2754mm of precipitation falls per year. Santarém receives a notable amount of rainfall throughout the year, including during its driest month. Santarém sits near the equator, so seasonal temperature differences are minimal throughout the year.
Temperature
Santarém has relatively stable temperatures year-round, staying within a 7°C range. The warmest month is October, when average highs reach 32°C and the mean temperature sits around 29°C. April is the coolest month, with minimum temperatures around 25°C and an average of 27°C. Daily temperature variation is modest, with an average difference of 5°C between highs and lows.
Precipitation
Santarém is a very wet location, receiving approximately 2754mm of precipitation annually, which averages out to around 230mm per month. The wettest month is March, averaging 426mm of rainfall. April and February also tend to see above-average precipitation. The driest month is August, with just 55mm. That's 371mm less than March, 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.
Wind
Santarém 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 September, averaging 3km/h, though still comfortable for most outdoor activities. The calmest conditions occur in June, with average winds dropping to 2km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 1km/h between the calmest and windiest months.
Seasons
92 days until Spring
It is currently winter in Santarém, which began on June 21, 2026. Santarém sits near the equator, so the traditional four-season cycle is less pronounced — temperatures remain relatively stable year-round. The warmest period peaks in October at around 32°C, while the coldest stretch bottoms out in April near 25°C. Spring is next, beginning on September 23, 2026 — 92 days from now.
Spring
Temperatures range from 26 to 32°C. Precipitation is moderate at around 290mm for the season, averaging 97mm per month. Winds are generally light, averaging 3km/h. An umbrella or waterproof jacket is advisable as spring showers are frequent.
Summer
Temperatures range from 25 to 30°C. Rainfall is heavy, totalling around 1020mm across the season with a monthly average of 340mm. Winds are generally light, averaging 3km/h. Light, breathable clothing is ideal — perfect conditions for outdoor activities.
Autumn
Temperatures range from 25 to 30°C. Rainfall is heavy, totalling around 1173mm across the season with a monthly average of 391mm. Winds are generally light, averaging 2km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.
Winter
Temperatures range from 25 to 32°C. Precipitation is moderate at around 271mm for the season, averaging 90mm per month. Winds are generally light, averaging 3km/h. A light jacket or sweater is usually sufficient, though cooler evenings may call for an extra layer.
Monthly Climate Data
The table below shows monthly climate averages for Santarém 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.
