Viersen's winters are chilly and unpredictable, with temperatures fluctuating between freezing and mild days. By spring, the weather starts to warm up, with March often seeing a significant rise in temperatures, occasionally reaching as high as 26°C. Summer months bring pleasant temperatures, with June being the warmest, but even then, it's not uncommon for the temperature to dip into single digits at night. Autumn is generally mild, with September and October experiencing average highs around 16°C and 11°C respectively. Winters are cool, but not freezing, making it a temperate climate overall.