September weather forecast
Cantwell, AK

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Weather in September

The first month of the autumn, September, is also an icy month in Cantwell, Alaska, with an average temperature varying between 42.4°F (5.8°C) and 30.2°F (-1°C).

Temperature

The commencement of September involves a temperature shift, with the average high-temperature dropping from a fresh 51.8°F (11°C) in August to a wintry 42.4°F (5.8°C). Cantwell reports an average nighttime low-temperature of 30.2°F (-1°C) in September.

Humidity

The average relative humidity in September is 85%.

Rainfall

In September, in Cantwell, the rain falls for 15.2 days. Throughout September, 1.34" (34mm) of precipitation is accumulated. In Cantwell, Alaska, during the entire year, the rain falls for 124.9 days and collects up to 14.88" (378mm) of precipitation.

Snowfall

January through June, August through December are months with snowfall. In September, it is snowing for 5.2 days. Throughout September, 2.13" (54mm) of snow is accumulated. Throughout the year, there are 145.2 snowfall days, and 58.39" (1483mm) of snow is accumulated.

Daylight

The average length of the day in September in Cantwell is 12h and 56min.
On the first day of September in Cantwell, sunrise is at 6:43 am and sunset at 9:07 pm. On the last day of the month, sunrise is at 8:04 am and sunset at 7:26 pm AKDT.

Sunshine

In September, the average sunshine in Cantwell is 6.5h.

UV index

The average daily maximum UV index in September is 2. A UV Index estimate of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV rays for ordinary individuals.
Note: The UV index of 2 in September translates into these instructions:
The majority are not significantly affected by prolonged sun exposure. Infants, children, and those with fair skin must always have protection. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. A hat with a broad brim is indispensable, filtering out up to half of UV rays. Be cautious! The UV radiation from the Sun can be magnified almost twofold by snow reflection.
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Frequently asked questions

How cold is September in Cantwell?

During September, Cantwell experiences an average high-temperature of 42.4°F (5.8°C) and a low-temperature of 30.2°F (-1°C).

What is the average humidity in September in Cantwell?

The average relative humidity in September in Cantwell, Alaska, is 85%.

How much does it rain in Cantwell in September?

In Cantwell, Alaska, in September, it is raining for 15.2 days, with typically 1.34" (34mm) of accumulated precipitation.

How many days does it snow in September in Cantwell?

In Cantwell, in September, during 5.2 snowfall days, 2.13" (54mm) of snow is typically accumulated.

What is the average length of the day in September in Cantwell?

In Cantwell, Alaska, the average day length in September is 12h and 56min.

When are sunrise and sunset in September in Cantwell?

On the first day of September in Cantwell, sunrise is at 6:43 am and sunset at 9:07 pm. On the last day of the month, sunrise is at 8:04 am and sunset at 7:26 pm AKDT.

How long on average sun shines in September in Cantwell?

In September, the average sunshine duration in Cantwell, Alaska, is 6.5h.

What is the UV index reading in September in Cantwell?

The average daily maximum UV index in September in Cantwell is 2. A UV Index reading of 2, and below, represents a minimal health vulnerability from 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
Cantwell, AK

Average temperature in September - Cantwell, AK
  • Average high temperature in September: 42.4°F

The warmest month (with the highest average high temperature) is July (57.7°F).
The month with the lowest average high temperature is January (3.4°F).

  • Average low temperature in September: 30.2°F

The month with the highest average low temperature is July (41.7°F).
The coldest month (with the lowest average low temperature) is January (-8°F).

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Average pressure in September
Cantwell, AK

Average pressure in September - Cantwell, AK
  • Average pressure in September: 29.76"Hg

The month with the highest atmospheric pressure is July (29.92"Hg).
The months with the lowest atmospheric pressure are September and October (29.76"Hg).

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Average wind speed in September
Cantwell, AK

Average wind speed in September - Cantwell, AK
  • Average wind speed in September: 5.2mph

The windiest month (with the highest average wind speed) is December (5.5mph).
The calmest months (with the lowest average wind speed) are May and June (4.8mph).

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Average humidity in September
Cantwell, AK

Average humidity in September - Cantwell, AK
  • Average humidity in September: 85%

The month with the highest relative humidity is March (94%).
The month with the lowest relative humidity is June (70%).

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Average rainfall in September
Cantwell, AK

Average rainfall in September - Cantwell, AK
  • Average rainfall in September: 1.34"

The wettest month (with the highest rainfall) is June (2.13").
The driest month (with the least rainfall) is February (0.63").

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Average rainfall days in September
Cantwell, AK

Average rainfall days in September - Cantwell, AK
  • Average rainfall days in September: 15.2 days

The month with the highest number of rainy days is June (20 days).
The month with the least rainy days is February (3.3 days).

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Average snowfall in September
Cantwell, AK

Average snowfall in September - Cantwell, AK
  • Average snowfall in September: 2.13"

The month with the highest snowfall is October (10.98").
The month with the least snowfall is July (0").

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Average snowfall days in September
Cantwell, AK

Average snowfall days in September - Cantwell, AK
  • Average snowfall days in September: 5.2 days

The months with the highest number of snowfall days are March and April (20.3 days).
The month with the least snowfall days is July (0 days).

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

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

The month with the longest days is June (Average daylight: 20h and 18min).
The month with the shortest days is December (Average daylight: 4h and 48min).

  • Average sunshine in September: 6h and 3min

The month with the most sunshine is June (Average sunshine: 11h and 18min).
The month with the least sunshine is December (Average sunshine: 2h and 48min).

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Average sunshine days in September
Cantwell, AK

Average sunshine days in September - Cantwell, AK
  • Average sunshine days in September: 11 days

The month with the most sunshine days is January (14.8 days).
The month with the least sunshine days is April (6.7 days).

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Average UV index in September
Cantwell, AK

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

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

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Average cloud cover in September
Cantwell, AK

Average cloud cover in September - Cantwell, AK
  • Average cloud cover in September: 58

The month with the most cloud cover is April (Cloud cover 63).
The month with the least cloud cover is June (Cloud cover 48).

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Average visibility in September
Cantwell, AK

Average visibility in September - Cantwell, AK
  • Average visibility in September: 4mi

The months with the highest visibility are June and July (6mi).
The months with the lowest visibility are January, March and November (3mi).

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Cantwell, Alaska, USA

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