September weather forecast
Mentasta Lake, AK

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Weather in September

September, the first month of the autumn in Mentasta Lake, is still a chilly month, with an average temperature fluctuating between 44.8°F (7.1°C) and 32.7°F (0.4°C).

Temperature

During the transition into September, Mentasta Lake observes a decrease in the average high-temperature, falling from a cool 54.5°F (12.5°C) in August to a frosty 44.8°F (7.1°C). In Mentasta Lake, an average nighttime temperature of 32.7°F (0.4°C) is expected during September.

Humidity

The average relative humidity in September in Mentasta Lake is 75%.

Rainfall

In Mentasta Lake, Alaska, during September, the rain falls for 12.9 days and regularly aggregates up to 1.18" (30mm) of precipitation. In Mentasta Lake, Alaska, during the entire year, the rain falls for 131.6 days and collects up to 13.15" (334mm) of precipitation.

Snowfall

January through May, September through December are months with snowfall in Mentasta Lake. September is the first month it typically snows. Throughout September, in the average 2.2 snowfall days, it receives 0.55" (14mm) of snow. Throughout the year, in Mentasta Lake, there are 93.8 snowfall days, and 32.72" (831mm) of snow is accumulated.

Daylight

In September, the average length of the day is 12h and 55min.
On the first day of the month, sunrise is at 6:23 am and sunset at 8:44 pm. On the last day of September, in Mentasta Lake, Alaska, sunrise is at 7:41 am and sunset at 7:05 pm AKDT.

Sunshine

The average sunshine in September is 8.9h.

UV index

The months with the lowest UV index in Mentasta Lake are January through April, September through December, with an average maximum UV index of 2. A UV Index estimate of 2, and below, represents a low health risk from exposure to the Sun's UV rays for average individuals.
Note: A maximum daily UV index of 2 during September morphs into the following directions:
While most people are not greatly affected by extended sun exposure, those with fair skin, babies, and children must always have protection. Stay safe from the Sun's strongest UV rays by limiting exposure during midday. Employ a hat with a wide brim for robust protection, cutting UV exposure by half. Consider this! The reflection from snow can almost double the intensity of the Sun's UV radiation.
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Frequently asked questions

What are the temperatures in Mentasta Lake in September?

In September, the average high-temperature and low-temperature are 44.8°F (7.1°C) and 32.7°F (0.4°C) respectively.

What is the average humidity in September in Mentasta Lake?

In September, the average relative humidity in Mentasta Lake is 75%.

How many days does it rain in September in Mentasta Lake?

In Mentasta Lake, Alaska, during September, the rain falls for 12.9 days and regularly aggregates up to 1.18" (30mm) of precipitation.

When does it start to snow in Mentasta Lake?

September is the first month it typically snows in Mentasta Lake, Alaska. Throughout September, in the average 2.2 snowfall days, it receives 0.55" (14mm) of snow.

What is the average length of the day in September in Mentasta Lake?

In Mentasta Lake, Alaska, the average day length in September is 12h and 55min.

When are sunrise and sunset in September in Mentasta Lake?

In September, on the first day of the month, sunrise is at 6:23 am and sunset at 8:44 pm. On the last day of the month, in Mentasta Lake, Alaska, sunrise is at 7:41 am and sunset at 7:05 pm AKDT.

How many hours of sunshine does Mentasta Lake have in September?

The average sunshine duration in September in Mentasta Lake, Alaska, is 8.9h.

When is the lowest UV index in Mentasta Lake?

The months with the lowest UV index in Mentasta Lake, Alaska, are January through April, September through December, with an average maximum UV index of 2.

What is the UV index reading in September in Mentasta Lake?

The average daily maximum UV index in September in Mentasta Lake is 2. A UV Index of 2, and less, symbolizes a minimal hazard to health from unprotected exposure to UV radiation.
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
Mentasta Lake, AK

Average temperature in September - Mentasta Lake, AK
  • Average high temperature in September: 44.8°F

The warmest month (with the highest average high temperature) is July (59.2°F).
The month with the lowest average high temperature is January (6.3°F).

  • Average low temperature in September: 32.7°F

The month with the highest average low temperature is July (43.7°F).
The coldest month (with the lowest average low temperature) is January (-4°F).

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Average pressure in September
Mentasta Lake, AK

Average pressure in September - Mentasta Lake, AK
  • Average pressure in September: 29.78"Hg

The month with the highest atmospheric pressure is February (29.96"Hg).
The month with the lowest atmospheric pressure is September (29.78"Hg).

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Average wind speed in September
Mentasta Lake, AK

Average wind speed in September - Mentasta Lake, AK
  • Average wind speed in September: 4.5mph

The windiest month (with the highest average wind speed) is January (5.5mph).
The calmest month (with the lowest average wind speed) is August (4.3mph).

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Average humidity in September
Mentasta Lake, AK

Average humidity in September - Mentasta Lake, AK
  • Average humidity in September: 75%

The month with the highest relative humidity is March (87%).
The month with the lowest relative humidity is June (65%).

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Average rainfall in September
Mentasta Lake, AK

Average rainfall in September - Mentasta Lake, AK
  • Average rainfall in September: 1.18"

The wettest month (with the highest rainfall) is June (2.28").
The driest month (with the least rainfall) is February (0.47").

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Average rainfall days in September
Mentasta Lake, AK

Average rainfall days in September - Mentasta Lake, AK
  • Average rainfall days in September: 12.9 days

The month with the highest number of rainy days is June (19.9 days).
The month with the least rainy days is February (5.2 days).

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Average snowfall in September
Mentasta Lake, AK

Average snowfall in September - Mentasta Lake, AK
  • Average snowfall in September: 0.55"

The month with the highest snowfall is November (5.94").
The months with the least snowfall are June, July and August (0").

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Average snowfall days in September
Mentasta Lake, AK

Average snowfall days in September - Mentasta Lake, AK
  • Average snowfall days in September: 2.2 days

The month with the highest number of snowfall days is November (15.8 days).
The months with the least snowfall days are June and July (0 days).

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Average daylight in September /
Average sunshine in September
Mentasta Lake, AK

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

The month with the longest days is June (Average daylight: 20h and 6min).
The month with the shortest days is December (Average daylight: 5h and 0min).

  • Average sunshine in September: 8h and 5min

The month with the most sunshine is June (Average sunshine: 13h and 12min).
The month with the least sunshine is December (Average sunshine: 3h and 12min).

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Average sunshine days in September
Mentasta Lake, AK

Average sunshine days in September - Mentasta Lake, AK
  • Average sunshine days in September: 13.3 days

The month with the most sunshine days is March (17.9 days).
The month with the least sunshine days is June (7.8 days).

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Average UV index in September
Mentasta Lake, AK

Average UV index in September - Mentasta Lake, AK
  • Average UV index in September: 2

The month with the highest UV index is July (UV index 4).
The months with the lowest UV index are January, February, March, April, September, October, November and December (UV index 2).

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Average cloud cover in September
Mentasta Lake, AK

Average cloud cover in September - Mentasta Lake, AK
  • Average cloud cover in September: 41

The month with the most cloud cover is April (Cloud cover 47).
The month with the least cloud cover is July (Cloud cover 40).

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Average visibility in September
Mentasta Lake, AK

Average visibility in September - Mentasta Lake, AK
  • Average visibility in September: 6mi

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

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Mentasta Lake, Alaska, USA

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