September weather forecast
Aasiaat, Greenland

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Weather in September

The month of September sees a gradual transition from summer to winter in Aasiaat. The temperatures start dipping, marking the beginning of autumn, while the increased wind speed further adds to the coolness in the air. However, the UV index shows a noticeable decline, reflecting the overall reduction in solar radiation. Additionally, the daylight duration also decreases significantly, a trend that underscores the city's march towards winter. Despite these changes, the sea temperature remains relatively stable.

Temperature

The start of September signals a gentle decrease in the average high-temperature, transitioning from a frosty 6.8°C (44.2°F) in August to a cold 3.6°C (38.5°F). A consistent average low-temperature of -0.3°C (31.5°F), with a minor variance from the daytime highs, is noted during the nights of September.

Humidity

The months with the lowest humidity in Aasiaat are July and September, with an average relative humidity of 76%.

Rainfall

In September, the rain falls for 6.9 days. Throughout September, 16mm (0.63") of precipitation is accumulated. Throughout the year, there are 51.9 rainfall days, and 168mm (6.61") of precipitation is accumulated.

Snowfall

January through June, August through December are months with snowfall. In Aasiaat, Greenland, during September, snow falls for 5.5 days and regularly aggregates up to 23mm (0.91") of snow. Throughout the year, there are 107.5 snowfall days, and 501mm (19.72") of snow is accumulated.

Sea temperature

In September, the average sea temperature in Aasiaat is 4.3°C (39.7°F).
Note: In the course of swimming, this situation is life-threatening and fraught with risk. The severe cold of the water leads to immediate hyperventilation. Wearing a specialized swimsuit is critical to limit thermal injury.

Daylight

The average length of the day in September is 13h and 14min.
On the first day of September, sunrise is at 06:57 and sunset at 22:05. On the last day of the month, sunrise is at 08:44 and sunset at 19:58 -01.

Sunshine

In Aasiaat, the average sunshine in September is 6.6h.

UV index

The average daily maximum UV index in September in Aasiaat is 2. A UV Index estimate of 2, and below, represents a low threat to health from unprotected exposure to Sun's UV rays for average individuals.
Note: A maximum daily UV index of 2 during September morphs into the following directions:
Apart from children, who require continuous protection, most can endure sun exposure for up to an hour without experiencing burns. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Stay sun-safe with clothing that is both closely woven and worn loosely. Observe! Snow reflection can nearly intensify the Sun's UV radiation twofold.
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Frequently asked questions

Is it cold in Aasiaat during September?

During September, Aasiaat experiences an average high-temperature of 3.6°C (38.5°F) and a low-temperature of -0.3°C (31.5°F).

What is the least humid month in Aasiaat?

The months with the lowest humidity in Aasiaat are July and September, with an average relative humidity of 76%.

What is the average humidity in September in Aasiaat?

In September, the average relative humidity is 76%.

How many days does it rain in September in Aasiaat?

In Aasiaat, Greenland, in September, during 6.9 rainfall days, 16mm (0.63") of precipitation is typically accumulated.

How many days does it snow in September in Aasiaat?

In Aasiaat, Greenland, in September, during 5.5 snowfall days, 23mm (0.91") of snow is typically accumulated.

How cold is the water in September in Aasiaat?

In Aasiaat, the average seawater temperature in September is 4.3°C (39.7°F). For swimming, this is considered extremely cold, dangerous, and life-threatening. Unless suitably protected with insulated waterproof clothing, hypothermia quickly occurs.

How many hours of daylight does Aasiaat have in September?

In Aasiaat, the average day length in September is 13h and 14min.

When is the sunrise / sunset in September in Aasiaat?

On the first day of September, sunrise is at 06:57 and sunset at 22:05. On the last day of the month, sunrise is at 08:44 and sunset at 19:58 -01.

How long on average sun shines in September in Aasiaat?

The average sunshine duration in September in Aasiaat is 6.6h.

What is the UV index reading in September in Aasiaat?

The average daily maximum UV index in September is 2. A UV Index of 2, and less, symbolizes a low health risk from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover

Average temperature in September
Aasiaat, Greenland

Average temperature in September - Aasiaat, Greenland
  • Average high temperature in September: 3.6°C

The warmest month (with the highest average high temperature) is July (8.1°C).
The month with the lowest average high temperature is February (-13.9°C).

  • Average low temperature in September: -0.3°C

The month with the highest average low temperature is July (4°C).
The coldest month (with the lowest average low temperature) is February (-19.5°C).

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Average pressure in September
Aasiaat, Greenland

Average pressure in September - Aasiaat, Greenland
  • Average pressure in September: 1005.1mbar

The month with the highest atmospheric pressure is May (1013.7mbar).
The month with the lowest atmospheric pressure is January (1001.9mbar).

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Average wind speed in September
Aasiaat, Greenland

Average wind speed in September - Aasiaat, Greenland
  • Average wind speed in September: 12.8km/h

The windiest month (with the highest average wind speed) is November (15.3km/h).
The calmest month (with the lowest average wind speed) is July (10.4km/h).

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Average humidity in September
Aasiaat, Greenland

Average humidity in September - Aasiaat, Greenland
  • Average humidity in September: 76%

The months with the highest relative humidity are February and March (89%).
The months with the lowest relative humidity are July and September (76%).

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Average rainfall in September
Aasiaat, Greenland

Average rainfall in September - Aasiaat, Greenland
  • Average rainfall in September: 16mm

The wettest month (with the highest rainfall) is August (29mm).
The driest month (with the least rainfall) is June (6mm).

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Average rainfall days in September
Aasiaat, Greenland

Average rainfall days in September - Aasiaat, Greenland
  • Average rainfall days in September: 6.9 days

The month with the highest number of rainy days is August (8.7 days).
The month with the least rainy days is February (1.9 days).

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Average snowfall in September
Aasiaat, Greenland

Average snowfall in September - Aasiaat, Greenland
  • Average snowfall in September: 23mm

The month with the highest snowfall is December (83mm).
The month with the least snowfall is July (0mm).

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Average snowfall days in September
Aasiaat, Greenland

Average snowfall days in September - Aasiaat, Greenland
  • Average snowfall days in September: 5.5 days

The month with the highest number of snowfall days is January (15.6 days).
The months with the least snowfall days are July and August (0.2 days).

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Average sea temperature in September
Aasiaat, Greenland

Average sea temperature in September - Aasiaat, Greenland
  • Average sea temperature in September: 4.3°C

The best month for swimming (with the highest average sea temperature) is August (4.7°C).
The coldest months (with the lowest average sea temperature) are February, March and April (-1.5°C).

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Average daylight in September /
Average sunshine in September
Aasiaat, Greenland

Average daylight in September / Average sunshine in September - Aasiaat, Greenland
  • Average daylight in September: 13h and 1min

The month with the longest days is August (Average daylight: 17h and 36min).
The month with the shortest days is June (Average daylight: 0h and 0min).

  • Average sunshine in September: 6h and 4min

The month with the most sunshine is August (Average sunshine: 9h and 42min).
The month with the least sunshine is June (Average sunshine: 0h and 30min).

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Average sunshine days in September
Aasiaat, Greenland

Average sunshine days in September - Aasiaat, Greenland
  • Average sunshine days in September: 18.3 days

The months with the most sunshine days are June and July (23.5 days).
The month with the least sunshine days is February (16.3 days).

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Average UV index in September
Aasiaat, Greenland

Average UV index in September - Aasiaat, Greenland
  • Average UV index in September: 2

The month with the highest UV index is July (UV index 3).
The months with the lowest UV index are November and December (UV index 1).

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Average cloud cover in September
Aasiaat, Greenland

Average cloud cover in September - Aasiaat, Greenland
  • Average cloud cover in September: 55

The month with the most cloud cover is March (Cloud cover 68).
The month with the least cloud cover is July (Cloud cover 41).

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Average visibility in September
Aasiaat, Greenland

Average visibility in September - Aasiaat, Greenland
  • Average visibility in September: 10km

The months with the highest visibility are June, July and September (10km).
The months with the lowest visibility are February and March (7km).

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Aasiaat, Greenland

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