Replace windshield in summer?
 

I was getting ready to order a new windshield and seal and have it installed in a couple of weeks and then I got to thinking, would it be better to wait and do this in the summer? I was wondering if the colder temps would mess with the seal & the sealant. I am in houston, 50/75 temps currently, may get a little colder in Dec.

should be no problem. It's not like you're going to do it in subzero temperatures...
Rubber might be a little less flexble, not as soft as in hot weather, which might make it a little more difficult to install.
Are you using sealant with a new seal??
I'm not sure if that is really necessary. Read the instructions of the sealant, they should mention temperature limits for application.

I'm taking it to a windshield shop. When I had my '74 replaced they used some sort of black sealant that stayed semi-pliable. They used it around he outside edge and very little.

Thanks for the reply!

The seals in our cars are designed to be installed without sealant.

However in the real world some shops will use a non silicone sealant that stays soft. If they do a good job it will look fine.

But if it was me I wouldn't use any sealant.
My car would rarely see rain and is garaged most of the time.

Gotta tell us locals who, and how much! And how good they turn out to be...