Three cities in the Brazilian state of Paraná recorded negative temperatures on Monday, May 11 [1].

The event marks the coldest day of the year for every station monitored by the state meteorological agency, SIMEPAR [1]. This sudden drop in temperature highlights the volatility of regional weather patterns and the potential impact of severe cold fronts on southern Brazil.

According to the agency, the frost occurred as a cold front moved through the region [1]. The temperatures fell below zero in three specific cities, though the agency said it did not name the individual municipalities in the report [1].

SIMEPAR said the readings on Monday constituted a record low for the year across all of its monitoring stations [1]. The presence of these freezing temperatures, known locally as geadas, often leads to significant changes in local atmospheric conditions and can affect agriculture and infrastructure.

Meteorologists continue to monitor the movement of the cold front to determine how long these temperatures will persist. While the state is accustomed to seasonal shifts, the uniformity of the record lows across all stations indicates a widespread weather event [1].

“Three cities in Paraná recorded negative temperatures on Monday, May 11.”

The synchronization of record-low temperatures across all SIMEPAR stations suggests a powerful and comprehensive cold front. In southern Brazil, such freezing events can lead to crop damage and increased energy demand for heating, making the monitoring of these trends critical for state infrastructure and agricultural planning.