Cologne, Germany, in September typically experiences a transition from summer to autumn. Average high temperatures range from 18-21C (64-70F), while average lows fall between 9-12C (48-54F). This period sees decreasing daylight hours and a moderate chance of rainfall, with an average of around 50-60mm spread across the month. While sunny days are still possible, visitors should be prepared for varied conditions.
Understanding the typical climate conditions during this time is valuable for travelers planning trips to the city. Packing layers of clothing is advisable to accommodate fluctuating temperatures throughout the day. The pleasant weather makes September a suitable time for exploring Cologne’s outdoor attractions, such as the Rhine River promenade and the numerous parks and gardens. Historically, September has marked the end of the peak tourist season, potentially leading to slightly smaller crowds and more competitive accommodation rates.