Climate Insights for São Lourenço do Sul

The climate in São Lourenço do Sul is warm and mild. The average annual temperature is 19°C and approximately 1279mm of precipitation falls per year. São Lourenço do Sul receives a notable amount of rainfall throughout the year, including during its driest month. São Lourenço 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, March. The coldest months are July, June, August, when temperatures can drop to 13°C.

São Lourenço do Sul sees moderate temperature variation throughout the year, ranging from 13°C to 26°C. The warmest month is January, when average highs reach 26°C and the mean temperature sits around 24°C. July is the coolest month, with minimum temperatures around 13°C and an average of 14°C. Daily temperature variation is modest, with an average difference of 2°C between highs and lows. The sharpest temperature change occurs between April and May, with a 4°C shift in average temperatures.

São Lourenço do Sul is a fairly wet location, receiving approximately 1279mm of precipitation annually, which averages out to around 107mm per month. The wettest month is September, averaging 175mm of rainfall. October and May also tend to see above-average precipitation. The driest month is February, with just 61mm. That's 114mm less than September, the wettest month. Precipitation varies noticeably between seasons, with the second half (July to December) of the year generally seeing more rainfall.

São Lourenço do Sul is very windy, with an average annual wind speed of 32km/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 35km/h, which can feel quite blustery and may affect outdoor activities. The calmest conditions occur in June, with average winds dropping to 29km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 6km/h between the calmest and windiest months. Wind tends to pick up during the summer months. The seasonal averages are 30km/h in winter, 34km/h in spring, 33km/h in summer, 31km/h in autumn.

It is currently autumn in São Lourenço do Sul, which began on March 20, 2026. São Lourenço 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 26°C, while the coldest stretch bottoms out in July near 13°C. Winter is next, beginning on June 21, 2026 — 87 days from now.

The best time to visit São Lourenço do Sul is during January, February, April, November and December, when the weather is most comfortable for travellers. During these months, average temperatures hover around 23°C with modest rainfall averaging 83mm per month. By contrast, July can be quite cold with temperatures dropping to 13°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 Lourenço 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.