Climate Overview
The climate in Tres Arroyos is temperate. The average annual temperature is 15°C and approximately 603mm of precipitation falls per year. May is the wettest month, receiving around 104mm of rainfall. Tres Arroyos 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: December, February, January. The coldest months are June, July, August, when temperatures can drop to 4°C.
Temperature
Temperatures in Tres Arroyos vary considerably across the year, with a 26°C difference between the coldest and warmest months. The warmest month is December, when average highs reach 30°C and the mean temperature sits around 23°C. June is the coolest month, with minimum temperatures around 4°C and an average of 7°C. On average, daily temperatures fluctuate by about 11°C between overnight lows and afternoon highs. The sharpest temperature change occurs between November and December, with a 5°C shift in average temperatures.
Precipitation
Tres Arroyos is a relatively dry area, receiving approximately 603mm of precipitation annually, which averages out to around 50mm per month. The wettest month is May, averaging 104mm of rainfall. January and November also tend to see above-average precipitation. The driest month is August, with just 6mm. That's 98mm less than May, 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.
Wind
Tres Arroyos 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 December, averaging 5km/h, though still comfortable for most outdoor activities. The calmest conditions occur in May, with average winds dropping to 3km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 2km/h gap between the calmest and windiest months.
Seasons
63 days until Spring
It is currently winter in Tres Arroyos, which began on June 21, 2026. Tres Arroyos 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 December at around 30°C, while the coldest stretch bottoms out in June near 4°C. Spring is next, beginning on September 23, 2026 — 63 days from now.
Spring
Temperatures range from 6 to 24°C. Rainfall is relatively light, with around 144mm over the season and a monthly average of 48mm. Winds are generally light, averaging 5km/h. Light layers work well as temperatures warm through the season — a great time to be outdoors.
Summer
Temperatures range from 15 to 30°C. Precipitation is moderate at around 153mm for the season, averaging 51mm per month. Winds are generally light, averaging 5km/h. Light, breathable clothing is ideal — perfect conditions for outdoor activities.
Autumn
Temperatures range from 6 to 25°C. Precipitation is moderate at around 226mm for the season, averaging 75mm per month. Winds are generally light, averaging 4km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.
Winter
Temperatures range from 4 to 16°C. Rainfall is relatively light, with around 80mm over the season and a monthly average of 27mm. Winds are generally light, averaging 4km/h. A light jacket or sweater is usually sufficient, though cooler evenings may call for an extra layer.
Best Time to Visit
The best time to visit Tres Arroyos is during January, February, March, November and December, when the weather is most comfortable for travellers. During these months, average temperatures hover around 21°C with modest rainfall averaging 56mm per month. By contrast, June can be quite cold with temperatures dropping to 4°C. A light rain jacket is recommended, though showers are generally brief and shouldn't disrupt your plans.
Monthly Climate Data
The table below shows monthly climate averages for Tres Arroyos 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.