Climate Insights for Arroio do Meio

The climate in Arroio do Meio is warm and mild. The average annual temperature is 19°C and approximately 1746mm of precipitation falls per year. Arroio do Meio receives a notable amount of rainfall throughout the year, including during its driest month. Arroio do Meio 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, December. The coldest months are July, June, August, when temperatures can drop to 10°C.

Arroio do Meio sees moderate temperature variation throughout the year, ranging from 10°C to 30°C. The warmest month is January, when average highs reach 30°C and the mean temperature sits around 24°C. July is the coolest month, with minimum temperatures around 10°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 April and May, with a 4°C shift in average temperatures.

Arroio do Meio is a fairly wet location, receiving approximately 1746mm of precipitation annually, which averages out to around 146mm per month. The wettest month is May, averaging 187mm of rainfall. October and September also tend to see above-average precipitation. The driest month is August, with just 99mm. That's 88mm 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.

Arroio do Meio is mildly breezy, with an average annual wind speed of 14km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is November, averaging 15km/h, though still comfortable for most outdoor activities. The calmest conditions occur in May, with average winds dropping to 12km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 3km/h between the calmest and windiest months.

It is currently autumn in Arroio do Meio, which began on March 20, 2026. Arroio do Meio 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 30°C, while the coldest stretch bottoms out in July near 10°C. Winter is next, beginning on June 21, 2026 — 89 days from now.

The best time to visit Arroio do Meio is during August, when the weather is most comfortable for travellers. During these months, average temperatures hover around 16°C with modest rainfall averaging 99mm per month. By contrast, January can be uncomfortably hot with highs reaching 30°C, while July is the coldest period with lows dropping to 10°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 Arroio do Meio 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.