The season is actually around 6 months. Latest snow is around April and the earliest I saw was October. There are exceptions but this is the general way it works. Alaska is not a giant iceberg that people think it is.
Anchorage for instance does not stay below 0 very long whereas Fairbanks can be below 0 for months. Difference in geography and proximity to the oceans. I have never seen Anchorage over 85 yet Fairbanks will be near triple digits. The Aleutian Islands are another beast all together, rarely below 20 but then rarely above 65 and the wind would cause a Floridian to cry. I witnessed 176 mph at the dock and 212 mph at the weather station on the mountain. And they whine about hurricanes.... LOL
How about things like this..... And you think there is no growing season.... LOL
Rutabaga - World Record 82.9 Lbs
Green Cabbage - World Record 127 Lbs
Here is the link http://community.adn.com/node/143372
Here is a list of world records. Look how many are in Alaska. I didn't even know this. http://www.giantgardening.com/records_table.php