September weather forecast
Kupreanof, AK

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Weather in September

September, the first month of the autumn in Kupreanof, is still a cool month, with an average temperature ranging between max 54.3°F (12.4°C) and min 46.4°F (8°C).

Temperature

September's average high-temperature is a fresh 54.3°F (12.4°C), maintaining a close comparison with August's 59°F (15°C). September nights cool to an average low-temperature of 46.4°F (8°C), a marginal decrease from its daytime equivalent.

Humidity

In September, the average relative humidity is 84%.

Rainfall

In Kupreanof, in September, it is raining for 17.5 days, with typically 5.12" (130mm) of accumulated precipitation. Throughout the year, in Kupreanof, there are 197.9 rainfall days, and 53.03" (1347mm) of precipitation is accumulated.

Snowfall

In Kupreanof, snow does not fall in June through September.

Daylight

In September, the average length of the day is 12h and 44min.
On the first day of September, sunrise is at 5:56 am and sunset at 7:46 pm. On the last day of the month, sunrise is at 6:55 am and sunset at 6:27 pm AKDT.

Sunshine

The average sunshine in September in Kupreanof is 6.7h.

UV index

The average daily maximum UV index in September in Kupreanof is 2. A UV Index estimate of 2, and below, represents a minimal health vulnerability from unprotected exposure to Sun's UV rays for the average person.
Note: The maximum daily UV index of 2 in September interprets into the following recommendations:
Extended sun exposure is not an issue for the majority. Children, infants, and fair-skinned individuals always need to be protected. The mid-day Sun emits the most powerful UV radiation, so seek shade and minimize exposure. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses.
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Frequently asked questions

What is the usual temperature for Kupreanof in September?

The average high-temperature, in September, in Kupreanof, is 54.3°F (12.4°C), while the average low-temperature is 46.4°F (8°C).

What is the average humidity in September in Kupreanof?

The average relative humidity in September in Kupreanof is 84%.

How many days does it rain in September in Kupreanof?

In Kupreanof, Alaska, in September, it is raining for 17.5 days, with typically 5.12" (130mm) of accumulated precipitation.

When it does not snow in Kupreanof?

June through September are months without snowfall in Kupreanof, Alaska.

Does it snow in Kupreanof in September?

In Kupreanof, Alaska, in September, it doesn't snow. In October, it regularly snows.

How many hours of daylight does Kupreanof have in September?

The average day length in September in Kupreanof, Alaska, is 12h and 44min.

When are sunrise and sunset in September in Kupreanof?

On the first day of September, sunrise is at 5:56 am and sunset at 7:46 pm. On the last day of the month, sunrise is at 6:55 am and sunset at 6:27 pm AKDT.

How long on average sun shines in September in Kupreanof?

In Kupreanof, the average sunshine duration in September is 6.7h.

What is the UV index reading in September in Kupreanof?

In Kupreanof, the average daily maximum UV index in September is 2. A UV Index estimate of 2, and below, represents a minimal hazard to health from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Kupreanof, AK

Average temperature in September - Kupreanof, AK
  • Average high temperature in September: 54.3°F

The warmest month (with the highest average high temperature) is July (59.7°F).
The month with the lowest average high temperature is December (32.4°F).

  • Average low temperature in September: 46.4°F

The month with the highest average low temperature is July (50.2°F).
The coldest month (with the lowest average low temperature) is February (25.9°F).

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Average pressure in September
Kupreanof, AK

Average pressure in September - Kupreanof, AK
  • Average pressure in September: 29.91"Hg

The month with the highest atmospheric pressure is July (30.05"Hg).
The month with the lowest atmospheric pressure is November (29.8"Hg).

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Average wind speed in September
Kupreanof, AK

Average wind speed in September - Kupreanof, AK
  • Average wind speed in September: 5.7mph

The windiest month (with the highest average wind speed) is January (8.2mph).
The calmest month (with the lowest average wind speed) is July (3.9mph).

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Average humidity in September
Kupreanof, AK

Average humidity in September - Kupreanof, AK
  • Average humidity in September: 84%

The months with the highest relative humidity are January and August (86%).
The month with the lowest relative humidity is May (81%).

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Average rainfall in September
Kupreanof, AK

Average rainfall in September - Kupreanof, AK
  • Average rainfall in September: 5.12"

The wettest month (with the highest rainfall) is October (6.3").
The driest month (with the least rainfall) is May (2.01").

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Average rainfall days in September
Kupreanof, AK

Average rainfall days in September - Kupreanof, AK
  • Average rainfall days in September: 17.5 days

The month with the highest number of rainy days is October (20.1 days).
The month with the least rainy days is February (9.5 days).

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Average snowfall in September
Kupreanof, AK

Average snowfall in September - Kupreanof, AK
  • Average snowfall in September: 0"

The month with the highest snowfall is March (13.46").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in September
Kupreanof, AK

Average snowfall days in September - Kupreanof, AK
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is March (10.8 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average daylight in September /
Average sunshine in September
Kupreanof, AK

Average daylight in September / Average sunshine in September - Kupreanof, AK
  • Average daylight in September: 12h and 4min

The month with the longest days is June (Average daylight: 17h and 42min).
The month with the shortest days is December (Average daylight: 6h and 54min).

  • Average sunshine in September: 6h and 4min

The month with the most sunshine is May (Average sunshine: 7h and 24min).
The months with the least sunshine are January and November (Average sunshine: 3h and 24min).

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Average sunshine days in September
Kupreanof, AK

Average sunshine days in September - Kupreanof, AK
  • Average sunshine days in September: 11.5 days

The month with the most sunshine days is December (12.5 days).
The month with the least sunshine days is November (8 days).

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Average UV index in September
Kupreanof, AK

Average UV index in September - Kupreanof, AK
  • Average UV index in September: 2

The months with the highest UV index are July and August (UV index 4).
The months with the lowest UV index are November and December (UV index 1).

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Average cloud cover in September
Kupreanof, AK

Average cloud cover in September - Kupreanof, AK
  • Average cloud cover in September: 55

The month with the most cloud cover is January (Cloud cover 66).
The months with the least cloud cover are February and May (Cloud cover 54).

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Average visibility in September
Kupreanof, AK

Average visibility in September - Kupreanof, AK
  • Average visibility in September: 6mi

The months with the highest visibility are February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are January, July and August (5mi).

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Kupreanof, Alaska, USA

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