September weather forecastCircle, AK
September
Weather in September
September, the first month of the autumn in Circle, is still a cool month, with an average temperature varying between 51.4°F (10.8°C) and 35.1°F (1.7°C).Temperature
Onset of September comes with a temperature decline, the average high falling from an enjoyable 64.9°F (18.3°C) in August to a cool 51.4°F (10.8°C). Circle witnesses an average low-temperature of 35.1°F (1.7°C) throughout the month of September.Humidity
In September, the average relative humidity is 74%.Rainfall
In Circle, in September, during 10 rainfall days, 0.67" (17mm) of precipitation is typically accumulated. Throughout the year, there are 82.8 rainfall days, and 7.17" (182mm) of precipitation is accumulated.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, in Circle, Alaska, there are 102.7 snowfall days, and 21.34" (542mm) of snow is accumulated.Daylight
The average length of the day in September in Circle is 13h and 3min.On the first day of the month, sunrise is at 6:15 am and sunset at 8:56 pm. On the last day of September, sunrise is at 7:46 am and sunset at 7:05 pm AKDT.
Sunshine
The average sunshine in September is 8h.UV index
In Circle, 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 radiation for the ordinary person.Note: A daily high UV index of 2 in September leads to these guidelines:
Babies, children, and individuals with sensitive skin should always have protection against extended sun exposure. Minimize direct exposure to the Sun during midday when its radiation is at its peak. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days. Mind this! Nearly twice the UV radiation from the Sun can be reflected by the snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
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: 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: 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: 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: 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: 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: 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: 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: 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: 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: 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: 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: 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).
