Mary, it also depends on what you expect from them. If you're looking for fragrance...well, the yellow varieties frequently aren't.

When we lived in Everett, I had great luck with a batch of the old Gallica roses such as Belle de Crecy (dark purple/pink and gloriously fragrant), the Apothecary Rose (red/pink), and the David Austin roses such as Brother Cadfael (huge! pink) and the Graham Thomas (yellow, and not much smell even though they say there is). The link has a section where you can search for roses by color and see pictures of them.

Here in Kansas, where as you might imagine, the weather is a bit more variable, I've had success with an orange/tangerine climber called (I think...) Westchester--absolutly gorgeous, smells great, and climbs like a monkey.

As others have said above, yellow roses are not nearly as hardy as most of the other colors. Talking to your local nursery about what works best in your area is highly recommended. A lot of the Jackson & Perkins roses are fairly hardy in your mild climate, also.

There are so many gorgeous flowers, it's hard to pick just one or two. Don't be "locked into" only looking at climbing roses, either--a lot of the "shrub" roses will get more than high enough to line a fence. I have to prune some of mine to keep them out of the nearby trees!

Good luck. Enjoy, and show pictures!

Lin