Data spanning over 250 years from Prague’s Klementinum meteorological station, one of the world’s oldest, demonstrates a clear and accelerating warming trend. Visualizations of the station’s temperature records reveal increasing temperatures over the decades. The long-term data set provides compelling evidence of climate change in the region. Scientists and observers note the particularly pronounced warming occurring in recent years. The Klementinum station’s continuous records offer a valuable historical perspective on climate patterns. This data contributes to a broader understanding of global warming phenomena and its impact on Central Europe. The visualization effectively illustrates the shift in temperature over two centuries.