Climate Insights for Rio Grande da Serra

The climate in Rio Grande da Serra is warm and mild. The average annual temperature is 21°C and approximately 2465mm of precipitation falls per year. Rio Grande da Serra receives a notable amount of rainfall throughout the year, including during its driest month. Rio Grande da Serra 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, March. The coldest months are July, August, June, when temperatures can drop to 14°C.

Rio Grande da Serra sees moderate temperature variation throughout the year, ranging from 14°C to 28°C. The warmest month is February, when average highs reach 28°C and the mean temperature sits around 24°C. July is the coolest month, with minimum temperatures around 14°C and an average of 18°C. Daily temperature variation is modest, with an average difference of 8°C between highs and lows. The sharpest temperature change occurs between April and May, with a 2°C shift in average temperatures.

Rio Grande da Serra is a very wet location, receiving approximately 2465mm of precipitation annually, which averages out to around 205mm per month. The wettest month is January, averaging 395mm of rainfall. February and March also tend to see above-average precipitation. The driest month is July, with just 56mm. That's 339mm less than January, 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.

Rio Grande da Serra 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 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 0km/h between the calmest and windiest months.

It is currently autumn in Rio Grande da Serra, which began on March 20, 2026. Rio Grande da Serra 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 28°C, while the coldest stretch bottoms out in July near 14°C. Winter is next, beginning on June 21, 2026 — 13 days from now.

The best time to visit Rio Grande da Serra is during June, July and August, when the weather is most comfortable for travellers. During these months, average temperatures hover around 18°C with modest rainfall averaging 85mm per month. By contrast, February can be uncomfortably hot with temperatures reaching 28°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 Rio Grande da Serra 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.