Climate Insights for Osório

The climate in Osório is warm and mild. The average annual temperature is 20°C and approximately 1399mm of precipitation falls per year. Osório receives a notable amount of rainfall throughout the year, including during its driest month. Osório 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 15°C.

Osório has relatively stable temperatures year-round, staying within a 10°C range. February is the warmest month, though highs remain moderate at 25°C with a mean of 24°C. July is the coolest month, with minimum temperatures around 15°C and an average of 15°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 3°C shift in average temperatures.

Osório is a fairly wet location, receiving approximately 1399mm of precipitation annually, which averages out to around 117mm per month. The wettest month is May, averaging 181mm of rainfall. September and October also tend to see above-average precipitation. The driest month is February, with just 62mm. That's 118mm less than May, the wettest month. Precipitation varies noticeably between seasons, with the second half (July to December) of the year generally seeing more rainfall.

Osório is very windy, with an average annual wind speed of 31km/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 February, 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.

It is currently autumn in Osório, which began on March 20, 2026. Osório 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 25°C, while the coldest stretch bottoms out in July near 15°C. Winter is next, beginning on June 21, 2026 — 88 days from now.

The best time to visit Osório is during January, February, April, August and December, when the weather is most comfortable for travellers. During these months, average temperatures hover around 22°C with modest rainfall averaging 86mm per month. By contrast, July can be quite cold with temperatures dropping to 15°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 Osório 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.