Meteorologists have reported that this is likely to be the warmest September since systematic temperature measurements have been taken in Poland. According to the Institute of Meteorology and Water Management (IMGW), there will be no sudden change in the weather trend by the end of September.

“The ongoing September 2023 is likely to become the warmest September in the history of measurements in Poland. Globally, the anomaly of the average air temperature with respect to the climatological norm has never been as high as in September 2023”, says the social media of the Institute of Meteorology and Water Management.

The meteorologists call the exceptionally high temperatures for the second half of September a “positive anomaly”. To calculate its value, the Institute compared the temperatures to the average of recent years. The analysis of measurement data from synoptic stations shows that this year’s September can be regarded as a thermally extreme month, with an area average anomaly relative to long-term conditions (1991-2020) of as much as +3.6 degrees. The summary relates to the first twenty days of September.

Calculations by meteorologists show that the lowest anomalies are mainly in the south-east (with a value of +2.6 degrees in Nowy Sącz). In the rest of the country, the anomalies are slowly approaching 4 degrees Celsius. As established by weather researchers, the highest anomaly value is recorded in one of the coldest places in Poland, namely Śnieżka. It is now 4.7 degrees higher than the average of the last three decades.

On Thursday, most of Poland was sunny, with only the south-east and the Carpathian Mountains periodically experiencing cloudy conditions with some fleeting rains. Temperatures ranged from 23 to 27 degrees Celsius, with temperatures in the Carpathian valleys around 22 degrees Celsius. The next few days may be marginally cooler, but the IMGW is not forecasting a sudden change in the weather trend.

Arkadiusz Słomczyński