What is the climate for salmon islands?

The term "Salmon Islands" is not a recognized geographical location. To give you a precise answer about the climate, please provide more context.

Do you mean:

* Specific islands with salmon populations? If so, please tell me the names of the islands (e.g., Vancouver Island, Prince of Wales Island).

* A general description of islands that support salmon? For example, are you thinking about islands in the Pacific Northwest, Alaska, or another region?

Once I have more information, I can provide you with details about the climate on those specific islands or in that region.