See long range weather forecasts for the next 60 days for the Deep South Region. The Old Farmer's Almanac's scientifically-based, long range forecasts can be used to make more informed decisions about future plans that depend on the weather, from vacations and weddings to sporting events and outdoor activities.
Weather in Alaska in September. The average maximum daytime temperature in Alaska in September is a cool 13Â°C (55Â°F). There are usually 5 hours of bright sunshine each day, which represents 41% of the 13 hours of daylight. The average sea temperature in and around Alaska in September is 12Â°C (54Â°F).
Alaska September Weather. September Anchorage Weather - In the month of September, Anchorage has recorded a record high temperature of 73 and, the daily high averages 55. Anchorage has recorded a record low temp of 19 and, the typical low is 41. Anchorage averages 2.87 inches of precipitation in September. September Barrow Weather - Barrow has recorded a record high of 62 in the month of September and, the high temperature averages 35. Barrow has recorded an extreme low temperature of 1 and, the average low is 28.