Poland recorded its third-warmest June since measurements began in 1951, with the nationwide average temperature reaching 18.8°C, the Institute of Meteorology and Water Management (IMGW) said on July 13.

The figure was 2°C above the 1991-2020 average and 1.2°C higher than in June 2025, leading IMGW to classify the month as extremely warm. Average temperatures across most of the country ranged from 17°C to 20°C.

The warmest region was Podkarpacie in south-eastern Poland, where the monthly average reached 19.8°C, or 2.1°C above normal. The coolest were the Baltic coastal areas, but their average of 17.7°C was still 1.8°C above the long-term norm.

Słubice in western Poland recorded 40.5°C on June 28, the highest temperature measured by a Polish synoptic weather station since records began.

IMGW said the strong warming trend observed in Poland had continued, with the average June temperature rising by an estimated 1.95°C since 1951.

The data were published two weeks after more than 80 Polish scientists urged lawmakers to hold an urgent parliamentary debate on the climate crisis and accelerate both emissions reductions and adaptation measures.

The scientists said Poland lacked a coherent, science-based strategy to protect residents from overheating, improve water retention, strengthen infrastructure and support communities most exposed to extreme weather. They offered to help prepare a roadmap for decarbonisation and climate adaptation.