September weather forecast
Nuuk, Greenland

September signifies the beginning of autumn in Nuuk, with temperatures beginning to decline. Altough still warmer than the first half of the year, the decrease is evident and signals the oncoming winter. The onset of autumn reshapes the landscape vibrantly, adding to the city's scenic attraction. Snowfall days start to creep back into the weather pattern, albeit at a lesser rate than the winter months. With an increase of 89mm (3.5") rainfall in September, the rain boots become necessary once again.

Temperature

September's onset in Nuuk introduces a mild reduction in the average high-temperature, from 9.3°C (48.7°F) in August to a still chilly 6°C (42.8°F). The temperature in Nuuk during September nights demonstrates a small drop from the daytime highs, settling to an average of 1.4°C (34.5°F).

Rainfall

September is the month with the most rainfall. Rain falls for 14.1 days and accumulates 89mm (3.5") of precipitation.

Snowfall

Months with snowfall are January through December. In Nuuk, during September, snow falls for 4.3 days. In Nuuk, Greenland, during the entire year, snow falls for 104.7 days.

Sea temperature

In Nuuk, the average seawater temperature in September is 3.5°C (38.3°F).
Note: In the activity of swimming, this is perceived as lethal and exceedingly dangerous. The cold water elicits sharp pain and instant hyperventilation. A specialized swimsuit is crucial to mitigate thermal detriment.

Daylight

In September, the average length of the day is 13h and 0min.
On the first day of the month, sunrise is at 07:11 and sunset at 21:41. On the last day of September, sunrise is at 08:34 and sunset at 19:58 -01.

Sunshine

In Nuuk, the average sunshine in September is 3h.

UV index

The average daily maximum UV index in September is 2. A UV Index of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV radiation for average individuals.
Note: The UV index of 2 during September leads to these advisories:
Although prolonged sun exposure does not typically bother most people, children, babies, and those with sensitive skin should always have protection. Midday is the peak time for the Sun's radiation; stay in the shade and protect yourself. Boost your sun resistance with garments that are densely woven yet spacious. Be informed! The Sun's UV radiation can be nearly doubled due to the reflection from snow.