Inside Passage Climate
The changing mists of the Inside Passage - home to the Tongass National Forest, North America’s northernmost temperate rainforest, and traditional home to the Tsimshian, Haida, Eyak, and Tlingit people - evoke a sense of magic and wonder. This region’s maritime climate is heavily influenced by the Pacific Ocean, its oceans and winds regulating temperatures along the coast.
Temperatures in the Inside Passage tend to avoid big extremes. Summer daytime highs are mild - generally in the low- to mid-60° F range, while nighttime lows are in the mid-to high-40s. It is a rainforest, so be prepared for light mist and rain at any time. In winter, temperatures rarely fall below 20° F, and snow along the temperate coastline tends to melt within a few days.
In Ketchikan, the longest days of summer have 17.5 hours of daylight, but only 7 hours of daylight on the shortest day of the year (December 21).
Explore things to do in Alaska’s Inside Passage.
AVERAGE TEMPERATURE FOR THE INSIDE PASSAGE
SUNLIGHT HOURS BY MONTH FOR THE INSIDE PASSAGE
PROPER CLOTHING FOR THE INSIDE PASSAGE
Alaska: AKA Your Next Adventure
Where will your Alaska adventure take you? Order our Official State of Alaska Vacation Planner and plot your course.