September weather forecast
Uummannaq, Greenland

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Weather in September

As autumn takes full swing, September's weather in Uummannaq, Greenland, continues to cool steadily. A prominent decrease in daylight hours indicates the city's transition from the mild climes of summer to the harsh chill of winter. Rainfall increases drastically to 20mm (0.79"), nearly doubling the amount recorded in August. While the sea remains relatively warm, hovering around 3.3°C (37.9°F), the impending winter chill begins to lurk. Even as colors change and leaves begin to fall, a brisk coolness in the air foreshadows the return of frosty conditions.

Temperature

As September begins, there is a decrease in the average high-temperature, falling from a frosty 9°C (48.2°F) in August to an icy 4°C (39.2°F). Uummannaq experiences an average nighttime temperature of 1°C (33.8°F) in September, reflecting a minor difference from the day's peak.

Rainfall

Throughout September, 20mm (0.79") of precipitation is accumulated. Throughout the year, 198mm (7.8") of rain is accumulated.

Sea temperature

September is the month with the warmest seawater, with an average sea temperature of 3.3°C (37.9°F).
Note: In the context of swimming, this situation is viewed as life-threatening and poses serious risks. The sensation of cold is painfully acute, leading to rapid hyperventilation. Using a specialized swimsuit is imperative to decrease thermal injury.

Daylight

In September, the average length of the day is 13h and 23min.
On the first day of September, sunrise is at 06:43 and sunset at 22:13. On the last day of the month, sunrise is at 08:44 and sunset at 19:52 -01.

Frequently asked questions

How cold is it in September?

An average high-temperature, in September, in Uummannaq, is 4°C (39.2°F) and the average low-temperature is 1°C (33.8°F).

How much does it rain in September?

Throughout September, 20mm (0.79") of precipitation is accumulated.

What month is the sea warmest?

With an average sea temperature of 3.3°C (37.9°F), September is the month with the warmest seawater.

How cold is the water in September in Uummannaq?

In Uummannaq, in September, the average water temperature is 3.3°C (37.9°F). For swimming, this is considered extremely cold, dangerous, and life-threatening. Unless suitably protected with insulated waterproof clothing, hypothermia quickly occurs.

What is the average length of the day in September?

In September, the average day length is 13h and 23min.

What time are sunrise and sunset in September?

On the first day of September, sunrise is at 06:43 and sunset at 22:13. On the last day of the month, sunrise is at 08:44 and sunset at 19:52 -01.

Average temperature in September
Uummannaq, Greenland

Average temperature in September - Uummannaq, Greenland
  • Average high temperature in September: 4°C

The warmest month (with the highest average high temperature) is July (11°C).
The month with the lowest average high temperature is February (-12°C).

  • Average low temperature in September: 1°C

The months with the highest average low temperature are July and August (5°C).
The coldest months (with the lowest average low temperature) are February and March (-17°C).

Average rainfall in September
Uummannaq, Greenland

Average rainfall in September - Uummannaq, Greenland
  • Average rainfall in September: 20mm

The wettest months (with the highest rainfall) are November and December (30mm).
The driest month (with the least rainfall) is June (8mm).

Average sea temperature in September
Uummannaq, Greenland

Average sea temperature in September - Uummannaq, Greenland
  • Average sea temperature in September: 3.3°C

The best month for swimming (with the highest average sea temperature) is September (3.3°C).
The coldest month (with the lowest average sea temperature) is February (-1.5°C).

Average daylight in September
Uummannaq, Greenland

Average daylight in September - Uummannaq, Greenland
  • Average daylight in September: 13h and 2min

The month with the longest days is August (Average daylight: 18h and 30min).
The months with the shortest days are June and December (Average daylight: 0h and 0min).

Uummannaq, Greenland

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