September’s closing weeks bring a noticeable shift in Iceland’s climate. Expect average temperatures ranging from 4C to 10C (39F to 50F), marking a transition from summer’s milder conditions to the approaching winter. This period experiences a mix of sunshine, cloud cover, and increased precipitation, including rain and occasional early snowfall in higher elevations. Decreased daylight hours are also characteristic of this time of year.
Understanding these conditions is crucial for travelers planning autumn visits. Packing layers for fluctuating temperatures and waterproof outerwear is essential. The shift in weather also impacts road accessibility, especially in the highlands, which may begin closing due to snow. Historically, this period represents the transition from harvest season to preparations for winter, influencing both agricultural practices and cultural traditions. The change in light conditions can offer unique photographic opportunities, showcasing the island’s landscape bathed in the soft autumnal light.