Climate Insights for São Mateus do Sul

The climate in São Mateus do Sul is warm and mild. The average annual temperature is 19°C and approximately 1528mm of precipitation falls per year. São Mateus do Sul receives a notable amount of rainfall throughout the year, including during its driest month. São Mateus do Sul 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: February, January, December. The coldest months are July, August, June, when temperatures can drop to 9°C.

São Mateus do Sul sees moderate temperature variation throughout the year, ranging from 9°C to 27°C. The warmest month is February, when average highs reach 27°C and the mean temperature sits around 22°C. July is the coolest month, with minimum temperatures around 9°C and an average of 14°C. On average, daily temperatures fluctuate by about 9°C between overnight lows and afternoon highs. The sharpest temperature change occurs between August and September, with a 3°C shift in average temperatures.

São Mateus do Sul is a fairly wet location, receiving approximately 1528mm of precipitation annually, which averages out to around 127mm per month. The wettest month is October, averaging 197mm of rainfall. December and January also tend to see above-average precipitation. The driest month is July, with just 68mm. That's 129mm less than October, the wettest month. Precipitation varies noticeably between seasons, with the second half (July to December) of the year generally seeing more rainfall.

São Mateus do Sul 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 4km/h, though still comfortable for most outdoor activities. The calmest conditions occur in March, 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 1km/h between the calmest and windiest months.

It is currently autumn in São Mateus do Sul, which began on March 20, 2026. São Mateus do Sul 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 February at around 27°C, while the coldest stretch bottoms out in July near 9°C. Winter is next, beginning on June 21, 2026 — 12 days from now.

The best time to visit São Mateus do Sul is during April and August, when the weather is most comfortable for travellers. During these months, average temperatures hover around 17°C with modest rainfall averaging 89mm per month. By contrast, February can be uncomfortably hot with highs reaching 27°C, while July is the coldest period with lows dropping to 9°C. Despite being the best months overall, some rain is still likely — pack a waterproof layer and plan a mix of indoor and outdoor activities.

The table below shows monthly climate averages for São Mateus do Sul 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.