Nokian WRG2 All-Season Tires

They are great tires if you have need for a winter-specialized tire that still does ok in warm weather. It's not a snow tire and it's not an all-season tire. Sort of a jack of all trades but master of none. If you don't deal with freezing temps most of the year then two sets of wheels fitted with snow tires and good LRR all-season tires may be a better option. If your average temps only get above 70F for a couple months of the year then the Nokians are a great choice.

 

Gotcha.

I like the EP422 but they are not a great handling tire. For a Prius that needs 17" tires they are great for fuel economy. In a 15" size I prefer the energy saver A/S.

 

I have used these Dunlop Graspic+DS-3 for really bad conditions here in CT, but on my AWD STi. They were more than adequate to get me around. I plan on trying them on my new Prius v since the bolt pattern is the same. I found the Dunlops poor for dry pavement cornering compared to my high-performance summer tires (but that's not what they were designed for).

I think you will find the Nokians noisier than you want and a compromise on dry pavement as I would agree with most of what F8L said. For as little as you will have snow and ice I think you might like what I have since they are good in the wet. They are not an all-season tire! Remember, do not get anything bigger than the stock tire size. If anything you want to err to smaller so the weight of the car can bear down on the footprint of the tire for better traction.

It's funny that you are in Richmond and I am in Connecticut, USA. I was zooming back and forth between Egmont, BC and Seattle all spring and summer in a red 2010 Prius! The trip took me most of the day and I wasn't worrying about gas mileage. You didn't ever see a red blur, did you? It was great driving the piss out of the car and still getting 40 MPG!
I liked stopping in Richmond. All the Asian food, and I really liked the Boathouse for seafood.

 

For snow tires you might want to check out the Michelin X-ice Xi3. Thought tire to beat when it comes to traction, comfort, handling and LRR in the studless category.

For mainly wet weather, the Continental Purecontact or ProContact are great choices as is the Primacy MXM4 (not available in a 195/65/15). Check out my tire review thread (in my signature).