Rio Grande, Southernmost Patagonia with a Record High June Tmin of +7,2°C in Winter

Rio Grande, a city located in the extreme south of Patagonia, has just experienced an extraordinarily mild winter night, with a record high minimum temperature of +7.2°C. This figure, logged in mid-June 2025, is well above average for a region where winter lows often plunge below freezing.

🌡️ A Rare Warm Spell in the Deep South

Rio Grande lies in the Argentine province of Tierra del Fuego, near the southern tip of South America. In June, this area typically experiences nighttime temperatures below 0°C, with frequent frost and even snow. However, on this occasion, persistent cloud cover, strong northwesterly winds, and the intrusion of anomalously warm air led to a minimum temperature 6 to 10 degrees above normal.

According to regional meteorological services, the +7.2°C minimum is likely the warmest overnight temperature ever recorded in Rio Grande during June.

🌬️ What’s Causing the Unusual Warmth?

This abnormal warmth was driven by:

• Foehn-like downslope winds on the eastern side of the Andes
• Persistent cloud cover that trapped daytime heat overnight

📌 Summary

• Location: Rio Grande, Tierra del Fuego, Argentina
• Date: June 12th 2025
• Record: Nighttime minimum temperature of +7.2°C
• Climatological Context: Warmest minimum ever recorded for this month, well above long-term averages

Illustration picture: https://www.costacruises.co.uk/costa-club/magazine/travel/things-to-do-ushuaia.html