What time did you start? To make it up by sunrise, you would have had to have been at the trailhead incredibly early. If you went the Green Lakes route that's probably what, 7-8 miles from the Sparks Lake trailhead to the summit?
41 degrees currently, low of 21! Clouds moved in at the perfect time to allow for overnight cooling but prevent daytime heating.
Had an amazing climb up the east face of South sister with my son this morning for Father's day. Some of the most beautiful conditions I've seen up there.