September weather forecast
Napaskiak, AK

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Weather in September

The first month of the autumn, September, is also a fresh month in Napaskiak, Alaska, with an average temperature varying between 41.5°F (5.3°C) and 52.5°F (11.4°C).

Temperature

The commencement of September indicates a gentle shift in the average high-temperature, receding from August's moderate 59.9°F (15.5°C) to a cool 52.5°F (11.4°C). Throughout September, the nighttime temperature averages to a cold 41.5°F (5.3°C).

Humidity

In September, the average relative humidity is 79%.

Rainfall

In Napaskiak, in September, it is raining for 15.5 days, with typically 1.85" (47mm) of accumulated precipitation. In Napaskiak, during the entire year, the rain falls for 129.5 days and collects up to 16.46" (418mm) of precipitation.

Snowfall

January through May, September through December are months with snowfall. September is the first month it typically snows. Throughout September, in the average 0.7 snowfall days, it receives 0.04" (1mm) of snow. In Napaskiak, during the entire year, snow falls for 74.8 days and aggregates up to 22.91" (582mm) of snow.

Daylight

The average length of the day in September is 12h and 50min.
On the first day of September, sunrise is at 7:42 am and sunset at 9:50 pm. On the last day of the month, sunrise is at 8:53 am and sunset at 8:20 pm AKDT.

Sunshine

In Napaskiak, the average sunshine in September is 4.8h.

UV index

In Napaskiak, the average daily maximum UV index in September is 2. A UV Index estimate of 2, and below, represents a low threat to health from exposure to the Sun's UV rays for ordinary individuals.
Note: The maximum UV index of 2 during September translates into these guidelines:
Though extended exposure to the sun typically does not concern most people, it is crucial to always shield children, infants, and those with sensitive skin. Considering the Sun's intensity during midday, it's wise to minimize direct exposure. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck. Be on the lookout! Nearly twofold UV radiation from the Sun can be reflected by snow.
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Frequently asked questions

What is the average September temperature in Napaskiak?

In September, the average high-temperature and low-temperature in Napaskiak are 52.5°F (11.4°C) and 41.5°F (5.3°C) respectively.

What is the average humidity in September in Napaskiak?

In Napaskiak, Alaska, the average relative humidity in September is 79%.

How much does it rain in Napaskiak in September?

In Napaskiak, Alaska, in September, it is raining for 15.5 days, with typically 1.85" (47mm) of accumulated precipitation.

When does it start to snow in Napaskiak?

September is the first month it typically snows in Napaskiak, Alaska. Throughout September, in the average 0.7 snowfall days, it receives 0.04" (1mm) of snow.

How many hours of daylight does Napaskiak have in September?

The average day length in September in Napaskiak, Alaska, is 12h and 50min.

What time are sunrise and sunset in September in Napaskiak?

On the first day of September in Napaskiak, sunrise is at 7:42 am and sunset at 9:50 pm. On the last day of the month, sunrise is at 8:53 am and sunset at 8:20 pm AKDT.

How long on average sun shines in September in Napaskiak?

In September, the average sunshine duration in Napaskiak, Alaska, is 4.8h.

What is the UV index reading in September in Napaskiak?

The average daily maximum UV index in September is 2. A UV Index of 2, and less, symbolizes a minimal health vulnerability from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Napaskiak, AK

Average temperature in September - Napaskiak, AK
  • Average high temperature in September: 52.5°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 (12.2°F).

  • Average low temperature in September: 41.5°F

The month with the highest average low temperature is July (49.6°F).
The coldest month (with the lowest average low temperature) is January (3.7°F).

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Average pressure in September
Napaskiak, AK

Average pressure in September - Napaskiak, AK
  • Average pressure in September: 29.72"Hg

The month with the highest atmospheric pressure is July (29.92"Hg).
The month with the lowest atmospheric pressure is December (29.64"Hg).

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Average wind speed in September
Napaskiak, AK

Average wind speed in September - Napaskiak, AK
  • Average wind speed in September: 9.9mph

The windiest month (with the highest average wind speed) is January (12.7mph).
The calmest month (with the lowest average wind speed) is July (8.5mph).

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Average humidity in September
Napaskiak, AK

Average humidity in September - Napaskiak, AK
  • Average humidity in September: 79%

The months with the highest relative humidity are January, February and March (91%).
The month with the lowest relative humidity is June (65%).

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Average rainfall in September
Napaskiak, AK

Average rainfall in September - Napaskiak, AK
  • Average rainfall in September: 1.85"

The wettest month (with the highest rainfall) is August (2.09").
The driest months (with the least rainfall) are January and April (0.91").

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Average rainfall days in September
Napaskiak, AK

Average rainfall days in September - Napaskiak, AK
  • Average rainfall days in September: 15.5 days

The month with the highest number of rainy days is August (19.7 days).
The month with the least rainy days is March (4.4 days).

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Average snowfall in September
Napaskiak, AK

Average snowfall in September - Napaskiak, AK
  • Average snowfall in September: 0.04"

The month with the highest snowfall is February (4.96").
The months with the least snowfall are June, July and August (0").

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Average snowfall days in September
Napaskiak, AK

Average snowfall days in September - Napaskiak, AK
  • Average snowfall days in September: 0.7 days

The month with the highest number of snowfall days is December (12.8 days).
The months with the least snowfall days are June, July and August (0 days).

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

Average daylight in September / Average sunshine in September - Napaskiak, AK
  • Average daylight in September: 12h and 5min

The month with the longest days is June (Average daylight: 19h and 0min).
The month with the shortest days is December (Average daylight: 5h and 48min).

  • Average sunshine in September: 4h and 5min

The month with the most sunshine is May (Average sunshine: 8h and 6min).
The month with the least sunshine is December (Average sunshine: 2h and 42min).

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Average sunshine days in September
Napaskiak, AK

Average sunshine days in September - Napaskiak, AK
  • Average sunshine days in September: 12.3 days

The month with the most sunshine days is March (17.5 days).
The month with the least sunshine days is August (8.6 days).

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Average UV index in September
Napaskiak, AK

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

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

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Average cloud cover in September
Napaskiak, AK

Average cloud cover in September - Napaskiak, AK
  • Average cloud cover in September: 62

The months with the most cloud cover are July and August (Cloud cover 67).
The month with the least cloud cover is June (Cloud cover 54).

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Average visibility in September
Napaskiak, AK

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

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

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Napaskiak, Alaska, USA

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