It wasn't so much chilly as it was windy. At game time it was around 68 degrees, which was warm but Seattle is incredibly humid, what with how often it rains there and all.
Safeco has a retractable "roof" which is more of a glorified canopy (click here). While it protects the field from the rain, it doesn't seal it.
19 posted on 06/23/2006 5:02:17 PM PDT by GOP_Raider
(FR's token San Francisco Giants fan)