September weather forecast
Big Lake, AK

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Weather in September

In September, Big Lake, Alaska, welcomes serene autumn conditions. The climate cools down while the rainfall has its peak, registering at 1.77" (45mm). A community adorns much-loved cozy sweaters and hot beverages become a regular diet. As October approaches, you can expect lower temperatures and decreasing precipitation. September in Big Lake celebrates the golden hues of fall and the steady transition towards colder days.

Temperature

A minor decrease in the average high-temperature is observed in Big Lake during September, shifting from an enjoyable 61.5°F (16.4°C) in August to a cool 53.4°F (11.9°C). In Big Lake, an average nighttime temperature of 42.1°F (5.6°C) is expected during September.

Humidity

The average relative humidity in September in Big Lake is 77%.

Rainfall

September is the month with the most rainfall in Big Lake. Rain falls for 15.1 days and accumulates 1.77" (45mm) of precipitation.

Snowfall

Months with snowfall are January through May, September through December. September is the first month it typically snows. Throughout September, in the average 0.3 snowfall days, it receives 0.16" (4mm) of snow. In Big Lake, during the entire year, snow falls for 56.8 days and aggregates up to 22.48" (571mm) of snow.

Daylight

In Big Lake, the average length of the day in September is 12h and 52min.
On the first day of the month, sunrise is at 6:53 am and sunset at 9:05 pm. On the last day of September, sunrise is at 8:06 am and sunset at 7:32 pm AKDT.

Sunshine

In September, the average sunshine is 7.8h.

UV index

In September, the average daily maximum UV index in Big Lake 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 average individuals.
Note: In September, the average maximum UV index of 2 translates into the following recommendations:
Prolonged sun exposure generally does not trouble most people. However, it is vital to ensure protection for babies, children, and individuals with sensitive skin. Direct Sun exposure should be minimized especially during midday when radiation is most intense. Boost your sun resistance with garments that are densely woven yet spacious. Be alert to the fact! The reflection from snow can nearly double the UV radiation of the Sun.
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Frequently asked questions

What are the temperatures in Big Lake in September?

In Big Lake, 53.4°F (11.9°C) is the average high-temperature and 42.1°F (5.6°C) is the average low-temperature during September.

What is the average humidity in September in Big Lake?

In Big Lake, Alaska, the average relative humidity in September is 77%.

What is the wettest month in Big Lake?

September is the month with the most rainfall in Big Lake, Alaska. Rain falls for 15.1 days and accumulates 1.77" (45mm) of precipitation.

How much does it rain in Big Lake in September?

In Big Lake, during September, the rain falls for 15.1 days and regularly aggregates up to 1.77" (45mm) of precipitation.

When does it start snowing in Big Lake?

September is the first month it typically snows in Big Lake, Alaska. Throughout September, in the average 0.3 snowfall days, it receives 0.16" (4mm) of snow.

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

The average day length in September in Big Lake, Alaska, is 12h and 52min.

When is the sunrise / sunset in September in Big Lake?

In September, on the first day of the month, sunrise is at 6:53 am and sunset at 9:05 pm. On the last day of the month, sunrise is at 8:06 am and sunset at 7:32 pm AKDT.

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

The average sunshine duration in September is 7.8h.

How high is the UV index in September in Big Lake?

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

Average temperature in September
Big Lake, AK

Average temperature in September - Big Lake, AK
  • Average high temperature in September: 53.4°F

The warmest month (with the highest average high temperature) is July (64.8°F).
The month with the lowest average high temperature is January (19.2°F).

  • Average low temperature in September: 42.1°F

The month with the highest average low temperature is July (50.2°F).
The coldest month (with the lowest average low temperature) is January (10.6°F).

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Average pressure in September
Big Lake, AK

Average pressure in September - Big Lake, AK
  • Average pressure in September: 29.75"Hg

The month with the highest atmospheric pressure is July (29.96"Hg).
The months with the lowest atmospheric pressure are November and December (29.68"Hg).

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Average wind speed in September
Big Lake, AK

Average wind speed in September - Big Lake, AK
  • Average wind speed in September: 4.4mph

The windiest month (with the highest average wind speed) is November (4.9mph).
The calmest months (with the lowest average wind speed) are July and August (4.2mph).

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Average humidity in September
Big Lake, AK

Average humidity in September - Big Lake, AK
  • Average humidity in September: 77%

The month with the highest relative humidity is March (88%).
The month with the lowest relative humidity is May (64%).

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Average rainfall in September
Big Lake, AK

Average rainfall in September - Big Lake, AK
  • Average rainfall in September: 1.77"

The wettest month (with the highest rainfall) is September (1.77").
The driest months (with the least rainfall) are April and May (0.59").

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Average rainfall days in September
Big Lake, AK

Average rainfall days in September - Big Lake, AK
  • Average rainfall days in September: 15.1 days

The month with the highest number of rainy days is August (17.4 days).
The month with the least rainy days is February (7.4 days).

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Average snowfall in September
Big Lake, AK

Average snowfall in September - Big Lake, AK
  • Average snowfall in September: 0.16"

The month with the highest snowfall is December (5.67").
The months with the least snowfall are June, July and August (0").

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Average snowfall days in September
Big Lake, AK

Average snowfall days in September - Big Lake, AK
  • Average snowfall days in September: 0.3 days

The month with the highest number of snowfall days is December (11.2 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
Big Lake, AK

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

The month with the longest days is June (Average daylight: 19h and 18min).
The month with the shortest days is December (Average daylight: 5h and 30min).

  • Average sunshine in September: 7h and 5min

The month with the most sunshine is May (Average sunshine: 11h and 54min).
The month with the least sunshine is December (Average sunshine: 3h and 48min).

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Average sunshine days in September
Big Lake, AK

Average sunshine days in September - Big Lake, AK
  • Average sunshine days in September: 12.2 days

The month with the most sunshine days is January (17 days).
The month with the least sunshine days is August (11.6 days).

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Average UV index in September
Big Lake, AK

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

The months with the highest UV index are May, June and July (UV index 4).
The month with the lowest UV index is December (UV index 1).

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Average cloud cover in September
Big Lake, AK

Average cloud cover in September - Big Lake, AK
  • Average cloud cover in September: 43

The month with the most cloud cover is December (Cloud cover 45).
The month with the least cloud cover is May (Cloud cover 38).

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Average visibility in September
Big Lake, AK

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

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

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Big Lake, Alaska, USA

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