September
Weather in September
Au revoir to summer, welcome fall. September is marked by further drops in sea temperatures, reaching 9.9°C (49.8°F). Light diminishes, yet days are not extremely short, giving a dazzling display of autumn colors throughout the country. Trails through foliage-covered landscapes and along tranquil lakes become a painter's dream. This month also marks the onset of the epic Aurora Borealis season, adding another layer of magic to the fall landscape.
Note: Swimming in 9.9°C (49.8°F) poses a severe threat. Even short exposure to 13°C (55.4°F) is chilling, and going below 10°C (50°F) can cause breathing irregularities and intense cold shock, based on one's stamina.
On the first day of September, sunrise is at 06:10 and sunset at 20:39. On the last day of the month, sunrise is at 07:33 and sunset at 18:57 GMT.
Sea temperature
In September, the average sea temperature is 9.9°C (49.8°F).Note: Swimming in 9.9°C (49.8°F) poses a severe threat. Even short exposure to 13°C (55.4°F) is chilling, and going below 10°C (50°F) can cause breathing irregularities and intense cold shock, based on one's stamina.
Daylight
The average length of the day in September is 13h and 0min.On the first day of September, sunrise is at 06:10 and sunset at 20:39. On the last day of the month, sunrise is at 07:33 and sunset at 18:57 GMT.
Updated: Jul 12, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is the water in September in Þorlákshöfn?
In September, the average sea temperature is 9.9°C (49.8°F). Swimming in 9.9°C (49.8°F) is considered dangerous. Unprotected immersion in temperatures below 10°C (50°F) causes quickly maximum intensity cold shock with hyperventilation.
How many hours of daylight does Þorlákshöfn have in September?
In September, the average day length in Þorlákshöfn is 13h and 0min.
When are sunrise and sunset in September?
In September, on the first day of the month, sunrise is at 06:10 and sunset at 20:39. On the last day of the month, sunrise is at 07:33 and sunset at 18:57 GMT.
Average sea temperature in September
Þorlákshöfn, Iceland
- Average sea temperature in September: 9.9°C
The best month for swimming (with the highest average sea temperature) is July (11.8°C).
The coldest month (with the lowest average sea temperature) is March (5.7°C).
Average daylight in September
Þorlákshöfn, Iceland
- Average daylight in September: 13h and 0min
The month with the longest days is June (Average daylight: 20h and 36min).
The month with the shortest days is December (Average daylight: 4h and 30min).
