September weather forecast
Svalbard and Jan Mayen

September signifies the peak of the short Arctic autumn in Svalbard and Jan Mayen, marked by a notable drop in temperatures and daylight hours.

In Svalbard, September's average temperatures range between 0°C (32°F) and 4°C (39.2°F). The capital, Longyearbyen, bears witness to these colder conditions as the transition from summer to winter accelerates. The vibrant wildlife activity that characterized the summer months slows down significantly, with many species entering dormancy or migrating to warmer regions.

Over in Jan Mayen, September brings average temperatures from 2°C (35.6°F) to 4°C (39.2°F). Daylight hours continue to decrease rapidly as the sun starts to set earlier, signaling the approaching Polar Night. The Norwegian military base on the island, along with the rest of the territory, adjusts to these changing conditions.

Precipitation in both Svalbard and Jan Mayen during September is moderate to high, typically falling as a mix of rain and snow due to the cooling temperatures.

Compared to August, September brings significantly cooler temperatures and reduced daylight hours. As these territories transition into October, these trends continue, with temperatures falling further and daylight hours decreasing rapidly. Despite the chill, the changing colors of the sparse vegetation and the increasing aurora borealis activity make September a visually stunning month to visit these Arctic territories. However, visitors should be well-prepared for cold and changeable weather conditions.

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• Longyearbyen - September »
  In Longyearbyen during September, the rain falls for 14 days and regularly aggregates up to 25mm (0.98") of precipitation. With an average of 14h and 30min of daylight, September has the longest days of the year in Longyearbyen, Svalbard and Jan Mayen.
• Barentsburg - September »
  The month with the longest days in Barentsburg is September, with an average of 14h and 24min of daylight. September has the longest days of the year in Barentsburg with an average of 14h and 24min of daylight.
• Olonkin City - September »
  In Olonkin City in September, during 19 rainfall days, 88mm (3.46") of precipitation is typically accumulated. In Olonkin City, Svalbard and Jan Mayen, in September, it is raining for 19 days, with typically 88mm (3.46") of accumulated precipitation.