Winters in Esch-sur-Alzette are cold and variable, with temperatures often below freezing, but occasional mild days can bring temperatures up to around 20°C. As spring approaches, temperatures gradually warm up, reaching averages of around 6-11°C by May, with some warmer days above 25°C. Summer is mild, with average highs around 18-19°C, and occasional hot days can reach as high as 32°C in June. Autumn brings a return to cooler temperatures, with averages ranging from 4-10°C, while winter temperatures remain relatively stable, averaging around 2-6°C over the course of the season.