Winters in Herten, Germany are typically cold and unpredictable, with temperatures often fluctuating between freezing and mild. January is the coldest month, averaging around 3°C, while February can still see lows of -15°C but also occasional warmer days. As spring approaches, March and April bring gentle warming, with average highs gradually increasing to around 7°C. Summers are warm and pleasant, with June being the hottest month, averaging a comfortable 19°C, followed by July and August which remain relatively stable in the mid-teens. The autumn months, September to November, see temperatures drop again, but not as drastically as winter, allowing for some milder days before the cold returns in December.