September weather forecast
Prudhoe Bay, AK

Weather in September

September, the first month of the autumn in Prudhoe Bay, is still a cold month, with temperature in the range of an average low of 33.1°F (0.6°C) and an average high of 39.2°F (4°C).

Temperature

In Prudhoe Bay, Alaska, the average high-temperature in September marginally drops from a chilly 46.9°F (8.3°C) in August to a cold 39.2°F (4°C). In September, the average low-temperature is 33.1°F (0.6°C).

Humidity

In Prudhoe Bay, the average relative humidity in September is 84%.

Rainfall

In Prudhoe Bay, in September, during 7 rainfall days, 0.31" (8mm) of precipitation is typically accumulated. In Prudhoe Bay, during the entire year, the rain falls for 52.1 days and collects up to 3.62" (92mm) of precipitation.

Snowfall

Months with snowfall are January through June, August through December. In Prudhoe Bay, during September, snow falls for 8.5 days and regularly aggregates up to 0.87" (22mm) of snow. Throughout the year, in Prudhoe Bay, there are 122.8 snowfall days, and 10.24" (260mm) of snow is accumulated.

Daylight

The average length of the day in September in Prudhoe Bay is 13h and 19min.
On the first day of September in Prudhoe Bay, Alaska, sunrise is at 6:09 am and sunset at 9:36 pm. On the last day of the month, sunrise is at 8:07 am and sunset at 7:19 pm AKDT.

Sunshine

In September, the average sunshine is 4.3h.

UV index

February through April, August through December, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index estimate of 2, and below, represents a low threat to health from exposure to the Sun's UV rays for the ordinary person.
Note: The average daily UV index of 1 in September transform into the following instructions:
People with sensitive skin, children, and babies should always be protected from prolonged sun exposure. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
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FAQ

What is the temperature in September in Prudhoe Bay?

In September, the average high-temperature is 39.2°F (4°C), and the average low-temperature is 33.1°F (0.6°C).

What is the average humidity in September in Prudhoe Bay?

The average relative humidity in September in Prudhoe Bay, Alaska, is 84%.

How much does it rain in Prudhoe Bay in September?

In Prudhoe Bay, during September, the rain falls for 7 days and regularly aggregates up to 0.31" (8mm) of precipitation.

How many days does it snow in September in Prudhoe Bay?

In Prudhoe Bay, Alaska, in September, snow falls for 8.5 days, with typically accumulated 0.87" (22mm) of snow.

What is the average length of the day in September in Prudhoe Bay?

In September, the average day length is 13h and 19min.

When is the sunrise / sunset in September in Prudhoe Bay?

In September, on the first day of the month, sunrise is at 6:09 am and sunset at 9:36 pm. On the last day of the month, in Prudhoe Bay, sunrise is at 8:07 am and sunset at 7:19 pm AKDT.

How many hours of sunshine does Prudhoe Bay have in September?

In September, the average sunshine duration in Prudhoe Bay is 4.3h.

When is the lowest UV index in Prudhoe Bay?

The months with the lowest UV index in Prudhoe Bay are February through April, August through December, with an average maximum UV index of 1.

What is the UV index intensity in September in Prudhoe Bay?

The average daily maximum UV index in September is 1. A UV Index reading of 2, and below, represents a low health threat from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall days
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Prudhoe Bay, AK

Average temperature in September - Prudhoe Bay, AK
  • Average high temperature in September: 39.2°F

The warmest month (with the highest average high temperature) is July (51.4°F).
The month with the lowest average high temperature is January (-7.1°F).

  • Average low temperature in September: 33.1°F

The month with the highest average low temperature is July (40.6°F).
The coldest month (with the lowest average low temperature) is January (-16.6°F).

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Average pressure in September
Prudhoe Bay, AK

Average pressure in September - Prudhoe Bay, AK
  • Average pressure in September: 29.84"Hg

The month with the highest atmospheric pressure is March (30.07"Hg).
The month with the lowest atmospheric pressure is September (29.84"Hg).

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Average wind speed in September
Prudhoe Bay, AK

Average wind speed in September - Prudhoe Bay, AK
  • Average wind speed in September: 11.2mph

The windiest month (with the highest average wind speed) is October (11.9mph).
The calmest month (with the lowest average wind speed) is May (9.8mph).

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Average humidity in September
Prudhoe Bay, AK

Average humidity in September - Prudhoe Bay, AK
  • Average humidity in September: 84%

The months with the highest relative humidity are January, February, March and December (93%).
The month with the lowest relative humidity is July (76%).

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Average rainfall in September
Prudhoe Bay, AK

Average rainfall in September - Prudhoe Bay, AK
  • Average rainfall in September: 0.31"

The wettest month (with the highest rainfall) is August (0.83").
The driest months (with the least rainfall) are January, April and December (0.16").

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Average rainfall days in September
Prudhoe Bay, AK

Average rainfall days in September - Prudhoe Bay, AK
  • Average rainfall days in September: 7 days

The month with the highest number of rainy days is August (11.8 days).
The month with the least rainy days is February (0.7 days).

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Average snowfall in September
Prudhoe Bay, AK

Average snowfall in September - Prudhoe Bay, AK
  • Average snowfall in September: 0.87"

The month with the highest snowfall is November (1.81").
The month with the least snowfall is July (0").

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Average snowfall days in September
Prudhoe Bay, AK

Average snowfall days in September - Prudhoe Bay, AK
  • Average snowfall days in September: 8.5 days

The month with the highest number of snowfall days is November (17.5 days).
The month with the least snowfall days is July (0.2 days).

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Average daylight in September /
Average sunshine in September
Prudhoe Bay, AK

Average daylight in September / Average sunshine in September - Prudhoe Bay, AK
  • Average daylight in September: 13h and 19min

The month with the longest days is August (Average daylight: 18h and 13min).
The months with the shortest days are June and December (Average daylight: 0h and 0min).

  • Average sunshine in September: 4h and 18min

The month with the most sunshine is August (Average sunshine: 6h and 36min).
The month with the least sunshine is December (Average sunshine: 0h and 24min).

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Average sunshine days in September
Prudhoe Bay, AK

Average sunshine days in September - Prudhoe Bay, AK
  • Average sunshine days in September: 14 days

The month with the most sunshine days is June (21 days).
The month with the least sunshine days is September (14 days).

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Average UV index in September
Prudhoe Bay, AK

Average UV index in September - Prudhoe Bay, AK
  • Average UV index in September: 1

The months with the highest UV index are June and July (UV index 3).
The months with the lowest UV index are February, March, April, August, September, October, November and December (UV index 1).

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Average cloud cover in September
Prudhoe Bay, AK

Average cloud cover in September - Prudhoe Bay, AK
  • Average cloud cover in September: 71

The months with the most cloud cover are November and December (Cloud cover 76).
The month with the least cloud cover is June (Cloud cover 45).

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Average visibility in September
Prudhoe Bay, AK

Average visibility in September - Prudhoe Bay, AK
  • Average visibility in September: 6mi

The months with the highest visibility are June, July, August, September and October (6mi).
The months with the lowest visibility are January, March and December (4mi).

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