Climate Overview
The climate in São Marcos is temperate. The average annual temperature is 17°C and approximately 1597mm of precipitation falls per year. São Marcos receives a notable amount of rainfall throughout the year, including during its driest month. São Marcos is in the Southern Hemisphere. The seasons are reversed — summer runs from December to February, while winter falls between June and August. The summer months are: January, December, February. The coldest months are July, June, August, when temperatures can drop to 8°C.
Temperature
São Marcos sees moderate temperature variation throughout the year, ranging from 8°C to 27°C. The warmest month is January, when average highs reach 27°C and the mean temperature sits around 22°C. July is the coolest month, with minimum temperatures around 8°C and an average of 12°C. On average, daily temperatures fluctuate by about 10°C between overnight lows and afternoon highs. The sharpest temperature change occurs between April and May, with a 3°C shift in average temperatures.
Precipitation
São Marcos is a fairly wet location, receiving approximately 1597mm of precipitation annually, which averages out to around 133mm per month. The wettest month is May, averaging 182mm of rainfall. January and February also tend to see above-average precipitation. The driest month is August, with just 95mm. That's 87mm less than May, the wettest month. Rainfall is relatively evenly distributed throughout the year, so there is no pronounced dry or wet season to plan around.
Wind
São Marcos 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 October, averaging 3km/h, though still comfortable for most outdoor activities. The calmest conditions occur in February, with average winds dropping to 3km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 0km/h between the calmest and windiest months.
Seasons
93 days until Spring
It is currently winter in São Marcos, which began on June 21, 2026. São Marcos is in the Southern Hemisphere, where the seasons are reversed — spring starts in September, summer in December, autumn in March, and winter in June. The warmest period peaks in January at around 27°C, while the coldest stretch bottoms out in July near 8°C. Spring is next, beginning on September 23, 2026 — 93 days from now.
Spring
Temperatures range from 12 to 25°C. Rainfall is heavy, totalling around 397mm across the season with a monthly average of 132mm. Winds are generally light, averaging 3km/h. An umbrella or waterproof jacket is advisable as spring showers are frequent.
Summer
Temperatures range from 16 to 27°C. Rainfall is heavy, totalling around 437mm across the season with a monthly average of 146mm. Winds are generally light, averaging 3km/h. Light, breathable clothing is ideal — perfect conditions for outdoor activities.
Autumn
Temperatures range from 11 to 25°C. Rainfall is heavy, totalling around 438mm across the season with a monthly average of 146mm. Winds are generally light, averaging 3km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.
Winter
Temperatures range from 8 to 20°C. Rainfall is heavy, totalling around 324mm across the season with a monthly average of 108mm. 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 São Marcos 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.
