I also live in a mild climate (Metro Vancouver) and no-one can pay me to run one set all year round. In my case I have the Michelin Pilot Sport All Season 4 that I have mounted from end of Feb through mid-December, and Nokian Outpost APT from mid-Dec to end of Feb. The Outpost APT are all-weather light-duty all terrain.
I hate how the Outpost APTs handle in the dry/warm and as decent in the snow as the PSAS4 is (for an all-season) I still change over when the time comes in Dec.
For my climates, the Outpost APT is sufficient for the times when we do get snow and for trips to the local ski hills (they've proven themselves during the most recent winter). In your case, as you have actual long and colder winters, I'd def recommend true winter tires and any sort of dedicated 3-season tire of your choice for warmer months.
I hate how the Outpost APTs handle in the dry/warm and as decent in the snow as the PSAS4 is (for an all-season) I still change over when the time comes in Dec.
For my climates, the Outpost APT is sufficient for the times when we do get snow and for trips to the local ski hills (they've proven themselves during the most recent winter). In your case, as you have actual long and colder winters, I'd def recommend true winter tires and any sort of dedicated 3-season tire of your choice for warmer months.