Iceland in late September experiences a transitional period between summer and winter. Expect average temperatures ranging from 3C to 8C (37F to 46F). Daylight hours decrease significantly during this month, with an average of around 12 hours at the beginning and closer to 9 hours by the end. Rainfall is common, and the first snowfalls in the highlands and northern regions are possible. This period offers a unique landscape with the potential for viewing the Northern Lights.
Understanding Iceland’s climate at this time of year is crucial for travelers. Packing appropriate clothing for both warm and cold conditions, including waterproof and windproof layers, is essential. The changing weather conditions can also impact travel plans, particularly driving routes and outdoor activities. Historically, late September marked the end of the traditional farming season and the beginning of preparations for winter.