Softshells aren't appropriate for cycling unless you're going very slow, and not in the rain. They're good for low effort hiking, sitting around in camp, or "around town" use. They're wind and water -resistant but not -proof. They breathe better than something like Goretex but not well enough for aerobic exercise.

From what I've heard Seattle has a similar climate to the UK. We get a lot of drizzle and rain, and winter temps here are chilly but rarely downright cold. What works for me is a good wind breaker (Arc'teryx Accelero) and merino wool under it. On cold days I'll wear a cashmere sweater from the thrift shop as a mid layer for insulation.