Poland records hottest June temperature ever at 38.9°C in Słubice, with 42°C forecast for Sunday
The western town of Słubice registered 38.9°C on Saturday, setting a new national June record as the IMGW weather service warns temperatures could hit 42°C on Sunday. Heat alerts remain in place across most of the country until Monday evening.
Record-breaking heat
On Saturday 27 June 2026, the town of Słubice in Poland's Lubusz Voivodeship recorded a temperature of 38.9°C, the highest ever measured in the country during the month of June. The previous June record was 38.3°C, set in 2019 in Ceber, Lower Silesia. The measurement was confirmed by the Institute of Meteorology and Water Management (IMGW).
Today’s measurement shows this year’s heatwave is already making history in Polish meteorology.
Forecast: even hotter Sunday
Meteorologists warn that the worst of the heat may not be over. IMGW forecasts indicate that on Sunday 28 June, temperatures in western Poland could locally reach up to 42°C. If confirmed, that would bring conditions very close to the all-time Polish record of 40.2°C, measured on 29 July 1921 in Prószków, Opole Voivodeship.
- Słubice records 38.9°C, the highest June temperature ever in Poland
- Forecast: up to 42°C in western Poland
- Heat warnings (Level III/II) expire at 20:00
- North-western Poland expected to cool to 20-21°C
- Country-wide cooling expected, highs of 19-24°C
Warnings and safety advice
Nearly the entire country is under heat warnings. Most voivodeships are covered by Level III alerts, the highest grade, while Level II alerts are in effect for Warmia-Masuria and parts of Pomerania, Podlaskie and West Pomerania. The warnings remain valid until 20:00 on Monday 29 June. IMGW urges particular caution for children, older people and those with chronic illnesses, recommending limiting time in the sun, drinking plenty of water and wearing light clothing and head coverings.
When will it cool down?
IMGW’s 10-day outlook shows that relief will come gradually. Residents of north-western Poland can expect temperatures to drop to 20–21°C from Wednesday 1 July. A more widespread cooldown is forecast for Saturday 4 July, when maximum temperatures across the country will fall to between 19 and 24°C.
