Climate Insights for Arroio dos Ratos

The climate in Arroio dos Ratos is temperate. The average annual temperature is 14°C and approximately 306mm of precipitation falls per year. December is the wettest month, receiving around 33mm of rainfall. Arroio dos Ratos 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: April, June, March. The coldest months are October, November, September, when temperatures can drop to 8°C.

Arroio dos Ratos has relatively stable temperatures year-round, staying within a 10°C range. April is the warmest month, though highs remain moderate at 18°C with a mean of 17°C. October is the coolest month, with minimum temperatures around 8°C and an average of 9°C. Daily temperature variation is modest, with an average difference of 2°C between highs and lows. The sharpest temperature change occurs between January and February, with a 3°C shift in average temperatures.

Arroio dos Ratos is a quite dry location, receiving approximately 306mm of precipitation annually, which averages out to around 26mm per month. The wettest month is January, averaging 33mm of rainfall. February and April also tend to see above-average precipitation. The driest month is June, with just 0mm. That's 32mm 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.

Arroio dos Ratos is relatively calm, with an average annual wind speed of 11km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is February, averaging 14km/h, though still comfortable for most outdoor activities. The calmest conditions occur in July, with average winds dropping to 6km/h, making it an ideal period for wind-sensitive activities. Wind speeds vary significantly across the year, with a 8km/h difference between the calmest and windiest months. This level of variation is worth factoring into travel plans. Wind tends to pick up during the summer months. The seasonal averages are 8km/h in winter, 13km/h in spring, 13km/h in summer, 9km/h in autumn.

It is currently winter in Arroio dos Ratos, which began on June 21, 2026. Arroio dos Ratos 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 April at around 18°C, while the coldest stretch bottoms out in October near 8°C. Spring is next, beginning on September 23, 2026 (16 days from now).

The best time to visit Arroio dos Ratos is during February, March, April, May and June, when the weather is most comfortable for travellers. During these months, average temperatures hover around 16°C with modest rainfall averaging 23mm per month. By contrast, October can be quite cold with temperatures dropping to 8°C. With minimal rainfall expected, you can pack light and plan outdoor activities with confidence.

The table below shows monthly climate averages for Arroio dos Ratos 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.