I say that those hot summer days are "good days" for weeding. The activity kills the weeds or the weeder. Either way, the task is accomplished.
I know a person with a garden larger than mine. She has people hand weeding but things get completely outta hand by late summer. I don't like to even drive by and see it ...
I don't like some things about mulch. I don't like most things about a rototiller. I have tried to encourage her to plan for rototiller use. Oh, she uses it, or has it used. The problem is careful spacing. She just can't seem to do that. Plant requirements don't control spacing in the garden. It was why I was pleased to downsize several years ago and get things back to beds - no tilling unless garden plants were completely outta the way, not often seldom a summer task.
Then the Garden Extension came along at 30' x 200' of additional ground. I do my very best to lay it out for maximum use of the rototiller. Wasted garden space is most everywhere! Little chance for garden plants to assist in suppressing weeds by crowding them a little! But then again, what the heck am I doing with such a large addition to my gardens? It almost feels like a "rent" I pay to use the rest of it ... but no, I just "farm it."
Steve