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).
Earlier records are either unavailable or unreliable. Ketchikan, Alaska has a mild humid temperate climate with warm summers and no dry season. The area within 25 mi of this station is covered by forests (54%) and oceans and seas (45%).ver the course of September typical wind speeds vary from 0 mph to 14 mph (calm to moderate breeze), rarely exceeding 23 mph (fresh breeze). The highest average wind speed of 8 mph (gentle breeze) occurs around September 27, at which time the average daily maximum wind speed is 14 mph (moderate breeze).