Petunias are tropical. They're not going to survive a winter. If you have one hanging nearby you could lose a branch or two and it could root into the ground.
Eh...we didn't have that many hours of dews above 65F at this point last year. It'd be interesting to compare the number of hours come Monday for each year through 7/22.
Can anyone recall where to find those ISU histograms of annual hours of dews above a certain threshold? They have a lot on their site, but it's tough to find what you're looking for.
Lots of 99s, but couldn't find a 100F on 00z MEX for our region. Seeing dews creeping up on MOS too (mid/upper 70s) so it may end up more like 7/3 last year with a lot of 97/77 crap in the torch spots.
Seems like we live in new dewy times.