Weather: It's looking like it will get fairly warm over the weekend, with highs in the upper 80's, but that's not ridiculously bad. Friday's high/low is 89/47, Saturday's is 87/47, and Sunday's is 84/48. Heat shouldn't be too much of a factor as long as Peter hydrates and keeps cool effectively.
On behalf of the ultraholics and the extended ultrarunning community, I'd like to wish you good luck Peter! We will be rooting you on and sending you good vibes from afar, and we know you are going to do awesome!