Climate Insights for Río Tercero

The climate in Río Tercero is warm and mild. The average annual temperature is 23°C and approximately 45mm of precipitation falls per year. January is the wettest month, receiving around 16mm of rainfall. Río Tercero 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: September, October, May. The coldest months are December, March, July, when temperatures can drop to 14°C.

Temperatures in Río Tercero vary considerably across the year, with a 22°C difference between the coldest and warmest months. September is the hottest month, with daytime highs reaching 36°C and an average of 29°C. December is the coolest month, with minimum temperatures around 14°C and an average of 23°C. On average, daily temperatures fluctuate by about 10°C between overnight lows and afternoon highs. The sharpest temperature change occurs between August and September, with a 10°C shift in average temperatures.

Río Tercero is a quite dry location, receiving approximately 45mm of precipitation annually, which averages out to around 4mm per month. The wettest month is January, averaging 16mm of rainfall. September and March also tend to see above-average precipitation. The driest month is April, with just 0mm. 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.

Río Tercero is relatively calm, with an average annual wind speed of 4km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is August, averaging 6km/h, though still comfortable for most outdoor activities. The calmest conditions occur in November, with average winds dropping to 2km/h, making it an ideal period for wind-sensitive activities. Wind speeds vary significantly across the year, with a 4km/h difference between the calmest and windiest months. This level of variation is worth factoring into travel plans.

It is currently winter in Río Tercero, which began on June 21, 2026. Río Tercero 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 September at around 36°C, while the coldest stretch bottoms out in December near 14°C. Spring is next, beginning on September 23, 2026 — 16 days from now.

The best time to visit Río Tercero is during January, February, March, June, July, August and December, when the weather is most comfortable for travellers. During these months, average temperatures hover around 19°C with modest rainfall averaging 4mm per month. By contrast, September can be uncomfortably hot with temperatures reaching 36°C. With minimal rainfall expected, you can pack light and plan outdoor activities with confidence.

The table below shows monthly climate averages for Río Tercero 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.