In the summer months I usually start mowing the lawn sometime between 8:15-8:30am to beat the heat and humidity. Takes me about 30 minutes usually. This morning however, the only chance I would have before the heavy rain came and with my schedule, would be to start at 7:20am. After mulling it over for a few minutes, then seeing the roofing guns blasting down the street already on a neighbor's house, I went for it. I raced to finish it because I felt so bad and finished in about 20 minutes. I have been feeling guilty all day about it because I really do have nice neighbors. So my question is, (as posted in the title) what is in your opinion, the earliest time to mow the lawn?