May through October is usually quite nice in CDA. Highs average 65 in May to 58 in Oct. with 2 inches of rain per month and even less in the summer (source: Wilkepedia).
Different perspective on "good" weather, I guess. I golf, and even in southern Idaho, where the winters are much more mild than northern Idaho, the winters are too long. In CDA, it snows into April, and May and June still average 1/3 of the days with precip. Golf in the rain -- no bueno. As I said, I went to CDA for about 12 straight years in mid-to-late June, and we almost always ran into at least one bad day. Not horrendous, but I don't want to retire to those conditions. A summer condo there would be fantastic, however.