I actually use a blue tarp over my run, which is situated under a couple of maple trees, so doesn't get a lot of direct overhead sun in the summer. I'd use white, or silver, but I already had the blue on hand.No, but the plastic would have to come off here in the summer--It would make it too hot here. We get over 110
It's sized so that it only comes about 2' down either side of a 4' wide x 6' high run, allowing plenty of light & air circulation through the sides. Rain's not usually a problem in the run unless there's a strong west wind behind it, blowing it horizontally.
We don't normally see 110 here, but we could have several days of 100+