September weather forecast
Norway

September ushers in the autumn season in Norway, characterized by cooler temperatures, shorter daylight hours, and the onset of fall foliage. In the southern regions, including Oslo, temperatures typically range from 9°C (48.2°F) to 16°C (60.8°F). Precipitation increases slightly, averaging 80mm (3.15"), falling predominantly as rain showers.

In Bergen, located on the west coast, temperatures are generally between 9°C (48.2°F) and 15°C (59°F), moderated by the Gulf Stream's influence. The city experiences substantial precipitation, averaging 210mm (8.27"), mostly falling as rain.

Inland regions, such as Ski, see temperatures drop to between 8°C (46.4°F) and 15°C (59°F). Rainfall is less frequent than in the coastal regions, allowing for crisp, clear autumn days.

In the northernmost regions, including Tromsø and Karpbukt, daylight hours decrease significantly, heralding the approach of the Polar Night phenomenon. However, temperatures remain relatively mild for the season, often ranging from 5°C (41°F) to 12°C (53.6°F). Precipitation is mostly in the form of rain showers, but early snowfall is not uncommon towards the end of the month.

Compared to August, September experiences noticeable changes with the arrival of autumn, including shorter days and cooler temperatures. As Norway transitions into October, the weather continues to cool down, daylight hours decrease further, particularly in the north, and autumn foliage reaches its peak.

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• Oslo - September »
  In Oslo, Norway, during September, the rain falls for 7 days and regularly aggregates up to 90mm (3.54") of precipitation. On the first day of September sunrise is at 06:13 and sunset at 20:20.
• Bergen - September »
  In Bergen, Norway, during September, the rain falls for 22.3 days and regularly aggregates up to 179mm (7.05") of precipitation. In September, in Bergen the rain falls for 22.3 days.
• Stavanger - September »
  On the last day of September, in Stavanger, sunrise is at 07:40 and sunset at 19:12 CEST. In September, in Stavanger the rain falls for 19.1 days.
• Trondheim - September »
  The month with the most rainfall in Trondheim is September, when the rain falls for 24 days and typically aggregates up to 133mm (5.24") of precipitation. On the first day of September in Trondheim, Norway, sunrise is at 06:04 and sunset at 20:31.
• Drammen - September »
  During the shift to September, Drammen records a mild decrease in average high-temperature, moving from an enjoyable 18.8°C (65.8°F) in August to a moderate 14.6°C (58.3°F). On the first day of September in Drammen, sunrise is at 06:16 and sunset at 20:21.
• Fredrikstad - September »
  In Fredrikstad, Norway, in September, during 16 rainfall days, 90mm (3.54") of precipitation is typically accumulated. In Fredrikstad, in September, the average water temperature is 15.8°C (60.4°F).
• Skien - September »
  In Skien, snow does not fall in June through September. In Skien, snow does not fall in June through September.
• Kristiansand - September »
  On the first day of September in Kristiansand sunrise is at 06:28 and sunset at 20:26. The onset of September in Kristiansand aligns with a soft reduction in the average high-temperature, gently falling from a comfortable 19.3°C (66.7°F) in August to a moderate 15.6°C (60.1°F).
• Alesund - September »
  In Alesund during September, the rain falls for 27 days and regularly aggregates up to 190mm (7.48") of precipitation. September brings a minor shift in the average high-temperature in Alesund, adjusting from a moderate 15°C (59°F) in August to a cool 12°C (53.6°F).
• Tønsberg - September »
  In Tønsberg, September is synonymous with the beginning of the fall season, witnessing a significant drop in temperature and daylight hours. On the first day of September in Tønsberg sunrise is at 06:16 and sunset at 20:19.
• Moss - September »
  In Moss in September, the average water temperature is 15.8°C (60.4°F). In Moss, Norway, snow does not fall in May through September.