I bottom water so any time of day works for me.

I really do not water my peppers, barring extreme drought. When I do it is in the evening.

On work days I water in the evenings as I work the earl bird shift. On my days off in the morning while it is nice, and cool. I avoid mid day as it is way too hot, and due to some medication I have to take I am supposed to stay out of the bright sun. I will burn in minutes with SPF 50 on.

I water anytime the soil gets dry.

There should not be a set time IMO it's more natural if you water at random it suits me this way but if it suits you best at a set time then it should be fine.

Thanks for sharing your watering habits guys!! I have some of my seedlings (4" terra cotta pots) sitting in a shallow tray of water during this intense heat wave we've been having on the gulf coast. I try not to let the soil dry out too much, but I recently had surgery & havent watered as diligently as usual. Some of my older plants were looking pretty droopy & their leaves started curling a couple days ago, but after thorough watering they bounced right back. Usually I don't water near as much as the last few weeks have required... But at least each of my plants is surviving the harsh summer & most are producing heavily!!