September weather forecast
Circle, AK

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Weather in September

September, the first month of the autumn in Circle, is also a fresh month, with an average temperature ranging between min 35.1°F (1.7°C) and max 51.4°F (10.8°C).

Temperature

The commencement of September involves a temperature shift, with the average high-temperature dropping from a refreshing 64.9°F (18.3°C) in August to a cool 51.4°F (10.8°C). Circle, in September, witnesses an average low-temperature of 35.1°F (1.7°C).

Humidity

In September, the average relative humidity is 74%.

Rainfall

In Circle, in September, it is raining for 10 days, with typically 0.67" (17mm) of accumulated precipitation. In Circle, during the entire year, the rain falls for 82.8 days and collects up to 7.17" (182mm) 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 2.2 snowfall days, it receives 0.67" (17mm) of snow. Throughout the year, there are 102.7 snowfall days, and 21.34" (542mm) of snow is accumulated.

Daylight

In September, the average length of the day is 13h and 3min.
On the first day of September, sunrise is at 6:15 am and sunset at 8:56 pm. On the last day of the month, sunrise is at 7:46 am and sunset at 7:05 pm AKDT.

Sunshine

The average sunshine in September is 8h.

UV index

In September, the average daily maximum UV index is 2. A UV Index value of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV radiation for ordinary individuals.
Note: A maximum UV index of 2 in September translates into the following recommendations:
Protection from prolonged sun exposure is necessary for babies, children, and individuals with sensitive skin. Minimize direct exposure to the Sun during midday when its radiation is at its peak. Stay sun-safe with clothing that is both closely woven and worn loosely. Take warning! The intensity of the Sun's UV radiation can be nearly amplified twice due to snow reflection.

Frequently asked questions

What are the temperatures in September?

In Circle, in September, the average high-temperature is 51.4°F (10.8°C), and the average low-temperature is 35.1°F (1.7°C).

What is the average humidity in September?

In September, the average relative humidity is 74%.

How much does it rain in September?

In Circle, in September, it is raining for 10 days, with typically 0.67" (17mm) of accumulated precipitation.

When does it start to snow?

September is the first month it typically snows. Throughout September, in the average 2.2 snowfall days, it receives 0.67" (17mm) of snow.

What is the average length of the day in September?

In September, the average day length is 13h and 3min.

When are sunrise and sunset in September in Circle?

In September, on the first day of the month, sunrise is at 6:15 am and sunset at 8:56 pm. On the last day of the month, sunrise is at 7:46 am and sunset at 7:05 pm AKDT.

How many hours of sunshine does Circle have in September?

The average sunshine duration in September is 8h.

What is the UV index reading in September?

In Circle, the average daily maximum UV index in September is 2. A UV Index of 2, and less, symbolizes a low health risk 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
Circle, AK

Average temperature in September - Circle, AK
  • Average high temperature in September: 51.4°F

The warmest month (with the highest average high temperature) is July (72.5°F).
The month with the lowest average high temperature is January (-6°F).

  • Average low temperature in September: 35.1°F

The month with the highest average low temperature is July (51.6°F).
The coldest month (with the lowest average low temperature) is January (-18.9°F).

Average pressure in September
Circle, AK

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

The month with the highest atmospheric pressure is February (30.02"Hg).
The month with the lowest atmospheric pressure is September (29.78"Hg).

Average wind speed in September
Circle, AK

Average wind speed in September - Circle, AK
  • Average wind speed in September: 3.9mph

The windiest month (with the highest average wind speed) is July (4.9mph).
The calmest months (with the lowest average wind speed) are January and December (2.7mph).

Average humidity in September
Circle, AK

Average humidity in September - Circle, AK
  • Average humidity in September: 74%

The months with the highest relative humidity are January, February and March (96%).
The month with the lowest relative humidity is June (49%).

Average rainfall in September
Circle, AK

Average rainfall in September - Circle, AK
  • Average rainfall in September: 0.67"

The wettest month (with the highest rainfall) is August (1.5").
The driest month (with the least rainfall) is February (0.24").

Average rainfall days in September
Circle, AK

Average rainfall days in September - Circle, AK
  • Average rainfall days in September: 10 days

The month with the highest number of rainy days is August (14.6 days).
The month with the least rainy days is February (1.9 days).

Average snowfall in September
Circle, AK

Average snowfall in September - Circle, AK
  • Average snowfall in September: 0.67"

The month with the highest snowfall is November (4.02").
The months with the least snowfall are June, July and August (0").

Average snowfall days in September
Circle, AK

Average snowfall days in September - Circle, AK
  • Average snowfall days in September: 2.2 days

The month with the highest number of snowfall days is March (18.3 days).
The months with the least snowfall days are June, July and August (0 days).

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

Average daylight in September / Average sunshine in September - Circle, AK
  • Average daylight in September: 13h and 0min

The month with the longest days is July (Average daylight: 20h and 42min).
The month with the shortest days is December (Average daylight: 3h and 18min).

  • Average sunshine in September: 8h and 0min

The month with the most sunshine is July (Average sunshine: 12h and 30min).
The month with the least sunshine is December (Average sunshine: 1h and 36min).

Average sunshine days in September
Circle, AK

Average sunshine days in September - Circle, AK
  • Average sunshine days in September: 15.9 days

The month with the most sunshine days is January (20.3 days).
The month with the least sunshine days is April (8.5 days).

Average UV index in September
Circle, AK

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

The months with the highest UV index are June and July (UV index 5).
The months with the lowest UV index are January, February, March, October, November and December (UV index 1).

Average cloud cover in September
Circle, AK

Average cloud cover in September - Circle, AK
  • Average cloud cover in September: 46

The month with the most cloud cover is April (Cloud cover 72).
The month with the least cloud cover is June (Cloud cover 33).

Average visibility in September
Circle, AK

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

The months with the highest visibility are May, June, July, August and September (6mi).
The months with the lowest visibility are January, February, March, April and December (2mi).

Circle, Alaska, USA

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