September weather forecast and climate
King Salmon, AK

Weather in September

The first month of the autumn, September, is also a fresh month in King Salmon, Alaska, with average temperature ranging between max 54.3°F (12.4°C) and min 42.4°F (5.8°C).

Temperature

In King Salmon, the average high-temperature slightly decreases, from a mild 60.4°F (15.8°C) in August, to a cool 54.3°F (12.4°C). In September, in King Salmon, the average low-temperature is 42.4°F (5.8°C).

Humidity

In King Salmon, the average relative humidity is 81%.

Rainfall

In September, the rain falls for 17.5 days. Throughout September, 2.05" (52mm) of precipitation is accumulated. Throughout the year, there are 158.9 rainfall days, and 18.43" (468mm) of precipitation is accumulated.

Snowfall

June through September are months without snowfall in King Salmon.

Daylight

In September, the average length of the day is 12.8h.

Sunshine

In September, the average sunshine in King Salmon is 5.4h.

UV index

In King Salmon, the average daily maximum UV index is 2. A UV Index value of 2, and less, symbolizes a low health risk from the exposure to the Sun's UV rays for the ordinary person.
Note: In September, the average maximum UV index of 2 translate into the following recommendations:
For the majority, extended sun exposure is not of great concern. Infants and people with sensitive skin must always be protected. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. 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.
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FAQ

What is the temperature in September in King Salmon?

In September, in King Salmon, the average high-temperature is 54.3°F (12.4°C), and the average low-temperature is 42.4°F (5.8°C).

What is the average humidity in September in King Salmon?

The average relative humidity in September is 81%.

How much does it rain in King Salmon in September?

In King Salmon, Alaska, in September, during 17.5 rainfall days, 2.05" (52mm) of precipitation is typically accumulated.

Does it snow in King Salmon in September?

In King Salmon, in September, it doesn't snow. In October, it regularly snows.

When it does not snow in King Salmon?

June through September are months without snowfall in King Salmon.

What is the average length of the day in September in King Salmon?

In September, the average length of the day in King Salmon, Alaska, is 12.8h.

How long on average sun shines in September in King Salmon?

The average sunshine in September in King Salmon, Alaska, is 5.4h.

How high is the UV index in September in King Salmon?

In King Salmon, the average daily maximum UV index in September is 2. A UV Index estimate of 2, and below, represents a low health risk from unprotected exposure to the UV radiation.

Average temperature in September
King Salmon, AK

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

The warmest month (with the highest average high temperature) is July (62.4°F).
The month with the lowest average high temperature is January (20.8°F).

  • Average low temperature in September: 42.4°F

The month with the highest average low temperature is July (48.7°F).
The coldest month (with the lowest average low temperature) is January (13.1°F).

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Average pressure in September
King Salmon, AK

Average pressure in September - King Salmon, AK
  • Average pressure in September: 29.72"

The month with the highest atmospheric pressure is July (29.96").
The month with the lowest atmospheric pressure is December (29.6").

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Average wind speed in September
King Salmon, AK

Average wind speed in September - King Salmon, AK
  • Average wind speed in September: 9mph

The windiest month (with the highest average wind speed) is December (10.4mph).
The calmest month (with the lowest average wind speed) is June (7.6mph).

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Average humidity in September
King Salmon, AK

Average humidity in September - King Salmon, AK
  • Average humidity in September: 81%

Months with the highest relative humidity are January and December (88%).
The month with the lowest relative humidity is May (67%).

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Average rainfall in September
King Salmon, AK

Average rainfall in September - King Salmon, AK
  • Average rainfall in September: 2.05"

The wettest month (with the highest rainfall) is August (2.2").
The driest month (with the least rainfall) is January (0.94").

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Average rainfall days in September
King Salmon, AK

Average rainfall days in September - King Salmon, AK
  • Average rainfall days in September: 17.5 days

The month with the highest number of rainy days is August (19.3 days).
The month with the least rainy days is March (6.7 days).

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Average snowfall in September
King Salmon, AK

Average snowfall in September - King Salmon, AK
  • Average snowfall in September: 0"

The month with the highest snowfall is December (4.53").
Months with the least snowfall are June, July, August and September (0").

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Average snowfall days in September
King Salmon, AK

Average snowfall days in September - King Salmon, AK
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is March (12.3 days).
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
King Salmon, AK

Average daylight in September / Average sunshine in September - King Salmon, AK
  • Average daylight in September: 12.8h

The month with the longest days is June (Average daylight: 18.3h).
The month with the shortest days is December (Average daylight: 6.4h).

  • Average sunshine in September: 5.4h

The month with the most sunshine is June (Average sunshine: 8.2h).
Months with the least sunshine are January and December (Average sunshine: 3.1).

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Average sunshine days in September
King Salmon, AK

Average sunshine days in September - King Salmon, AK
  • Average sunshine days in September: 11 days

The month with the most sunshine days is January (15.3 days).
The month with the least sunshine days is July (9.2 days).

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Average UV index in September
King Salmon, AK

Average UV index in September - King Salmon, AK
  • Average UV index in September: 2

The month with the highest UV index is July (UV index 4).
Months with the lowest UV index are November and December (UV index 1).

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Average cloud cover in September
King Salmon, AK

Average cloud cover in September - King Salmon, AK
  • Average cloud cover in September: 58

The month with the most cloud cover is August (Cloud cover 65).
Months with the least cloud cover are January and May (Cloud cover 55).

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Average visibility in September
King Salmon, AK

Average visibility in September - King Salmon, AK
  • Average visibility in September: 6mi

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

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