September in Iceland marks the meteorological beginning of autumn. Daylight hours decrease significantly throughout the month, transitioning from around 13 hours at the start to approximately 10 by the end. Temperatures typically range from an average high of 9C (48F) to an average low of 5C (41F). This period is characterized by increased precipitation compared to the summer months, and the first snowfalls in the highlands and northern regions become increasingly likely.
Understanding the climatic conditions prevalent during this transitional month is crucial for travelers planning to visit Iceland. Packing appropriate clothing, including layers for both warmth and rain protection, becomes essential. Road conditions can become more challenging due to rain and potential early snow, impacting accessibility to certain areas, particularly in the interior. The shift in weather also influences the availability of certain outdoor activities and tours. Historically, September has been a period of preparation for the approaching winter, with farming communities focusing on harvesting and securing resources. This season offers a unique blend of autumnal colors alongside lingering remnants of summer’s greenery.