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).
You'll find Alaska's summer temperatures surprisingly pleasant. Daytime highs range from 60Â°F - 80Â°F. Nighttime lows are refreshingly cool, dipping into the 40's - 50's. May and September are 5Â°- 10Â° cooler. However, temperatures vary wildly depending on which region of Alaska you plan to visit.ain. On average, Alaska's summers are slightly rainier than the rest of the U.S. But May is dry, with only a 25% chance of measurable rain on any given day. Alaska gets rainier as the summer progresses. By August, the chance of rain is just over 50%.Compare Alaska's rainfall to your hometown.