September weather forecastCooper Landing, AK
September
Weather in September
The first month of the autumn, September, is also a frosty month in Cooper Landing, Alaska, with an average temperature varying between 36.7°F (2.6°C) and 47.3°F (8.5°C).Temperature
As September commences, the average high-temperature subtly reduces, transitioning from a cool 55°F (12.8°C) in August to a frosty 47.3°F (8.5°C). September nights are marked by an average low-temperature of 36.7°F (2.6°C).Humidity
In Cooper Landing, the average relative humidity in September is 86%.Rainfall
In September, the rain falls for 20.9 days. Throughout September, 4.76" (121mm) of precipitation is accumulated. In Cooper Landing, during the entire year, the rain falls for 182.8 days and collects up to 46.1" (1171mm) of precipitation.Snowfall
January through May, September through December are months with snowfall. September is the first month it typically snows. Throughout September, in the average 0.3 snowfall days, it receives 0.28" (7mm) of snow. Throughout the year, there are 116.2 snowfall days, and 116.38" (2956mm) of snow is accumulated.Daylight
In September, the average length of the day is 12h and 50min.On the first day of the month, sunrise is at 6:55 am and sunset at 9:02 pm. On the last day of September, sunrise is at 8:05 am and sunset at 7:32 pm AKDT.
Sunshine
The average sunshine in September in Cooper Landing, Alaska, is 5.8h.UV index
In Cooper Landing, the average daily maximum UV index in September is 2. A UV Index of 2, and less, symbolizes a minimal health vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.Note: During September, 2 as the daily maximum UV index converts into the following advice:
While most people can stay under the sun for an hour without burning, children must always be guarded against sun exposure. Stay safe from the Sun's strongest UV rays by limiting exposure during midday. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses. Consider carefully! The reflective quality of snow can almost double the intensity of the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Cooper Landing, AK
- Average high temperature in September: 47.3°F
The warmest month (with the highest average high temperature) is July (58.6°F).
The month with the lowest average high temperature is January (18.7°F).
- Average low temperature in September: 36.7°F
The month with the highest average low temperature is July (44.1°F).
The coldest month (with the lowest average low temperature) is January (9°F).
Average pressure in September
Cooper Landing, AK
- Average pressure in September: 29.74"Hg
The month with the highest atmospheric pressure is July (29.98"Hg).
The month with the lowest atmospheric pressure is November (29.62"Hg).
Average wind speed in September
Cooper Landing, AK
- Average wind speed in September: 5.2mph
The windiest month (with the highest average wind speed) is November (6mph).
The calmest month (with the lowest average wind speed) is June (4.4mph).
Average humidity in September
Cooper Landing, AK
- Average humidity in September: 86%
The months with the highest relative humidity are March and December (92%).
The month with the lowest relative humidity is June (78%).
Average rainfall in September
Cooper Landing, AK
- Average rainfall in September: 4.76"
The wettest month (with the highest rainfall) is December (6.02").
The driest month (with the least rainfall) is June (2.2").
Average rainfall days in September
Cooper Landing, AK
- Average rainfall days in September: 20.9 days
The month with the highest number of rainy days is August (21.8 days).
The month with the least rainy days is February (6.8 days).
Average snowfall in September
Cooper Landing, AK
- Average snowfall in September: 0.28"
The month with the highest snowfall is December (24.06").
The months with the least snowfall are June, July and August (0").
Average snowfall days in September
Cooper Landing, AK
- Average snowfall days in September: 0.3 days
The month with the highest number of snowfall days is December (20.8 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Cooper Landing, AK
- Average daylight in September: 12h and 48min
The month with the longest days is June (Average daylight: 18h and 54min).
The month with the shortest days is December (Average daylight: 5h and 54min).
- Average sunshine in September: 5h and 48min
The months with the most sunshine are May and July (Average sunshine: 8h and 42min).
The month with the least sunshine is December (Average sunshine: 2h and 48min).
Average sunshine days in September
Cooper Landing, AK
- Average sunshine days in September: 7 days
The month with the most sunshine days is January (9.9 days).
The month with the least sunshine days is September (7 days).
Average UV index in September
Cooper Landing, 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, October, November and December (UV index 1).
Average cloud cover in September
Cooper Landing, AK
- Average cloud cover in September: 59
The month with the most cloud cover is April (Cloud cover 62).
The month with the least cloud cover is May (Cloud cover 54).
Average visibility in September
Cooper Landing, AK
- Average visibility in September: 5mi
The month with the highest visibility is June (6mi).
The months with the lowest visibility are January, February, March, April, November and December (4mi).
