Climate Insights for São Mateus do Sul

The climate in São Mateus do Sul is temperate. The average annual temperature is 18°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: January, February, April. The coldest months are June, July, August, when temperatures can drop to 7°C.

São Mateus do Sul sees moderate temperature variation throughout the year, ranging from 7°C to 27°C. The warmest month is January, when average highs reach 27°C and the mean temperature sits around 22°C. June is the coolest month, with minimum temperatures around 7°C and an average of 11°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 6°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 February, averaging 229mm of rainfall. August and December also tend to see above-average precipitation. The driest month is September, with just 49mm. That's 180mm less than February, the wettest month. Precipitation varies noticeably between seasons, with the first half (January to June) of the year generally seeing more rainfall.

São Mateus do Sul is relatively calm, with an average annual wind speed of 2km/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 June, 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 winter in São Mateus do Sul, which began on June 21, 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 January at around 27°C, while the coldest stretch bottoms out in June near 7°C. Spring is next, beginning on September 23, 2026 — 61 days from now.

The best time to visit São Mateus do Sul is during April, September and November, when the weather is most comfortable for travellers. During these months, average temperatures hover around 19°C with modest rainfall averaging 76mm per month. By contrast, January can be uncomfortably hot with highs reaching 27°C, while June is the coldest period with lows dropping to 7°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.