I am mystified at how varied everyones watering habits are from eachother. Yes, the local climate, soil conditions and setup are critical.
I still don't know my sunset zone. My plants are on a drip system. They get 2-3 hours of water at 15psi 2Xweek. In high heat, they might get 1 hour squeezed in there if there seems a need for it. They get morning sprinkling with fish emulsion as needed, between 1-2 x week. They get evening sprinking if they are completely desparate after triple digits. I don't count sprinkling as watering because I know most of it will evaporate. It tends to give the soil a buffer before baking.
If I ever decide to mulch my adult plants, then my watering routine will have to adjust. Currently, the potatoes are mulched which means the eggplants are mulched. The corn is densely packed and maintains its own micro-climate. The squash/melon/cucumber patch is mostly covered. The tomatoes could probably benefit from mulching. I just raised their skirts last night. I don't know how you people do it but all of my tomato plants are suffering from something different. sigh
Today, I harvested a large yellow squash. Plants are lovely.
Please share your watering system and habits.