No single solution really solves all circumstances. The best advice I have gleaned from the forum is to check your soil. I dig a finger down 3-4 inches to see if the soil is moist and cool or bone dry. Another good word of advice is to remember a raised bed still has similar properties of a big pot. The nutrients and water drain down and flush out faster than a ground level regular garden bed. During hot summer months I might have to water a smaller bed every other day. I find the outer perimeter of the bed dries out faster. Your plants will also let you know. Watch for wilting, especially tomatoes. They bounce right back with a good soaking. Some veggies require more frequent watering. Tomatoes and cucumbers tolerate more frequent watering than a Rosemary. Overall, trial and error are the best tools for learning what works for your garden conditions. My best word of advice would be to get in the habit of walking through to check on the garden daily. You will quickly observe the plants requirements and see vast changes based on weather patterns.

A 'rule of thumb' is generally, and this is flexible depending on plant type, size, and temperature, to help your plants get about 1" of water per week.

A large plant though, like a 8' - 10' tomato plant, in the heat of summer, would not mind a bit more.

And... lol... how you water is going to make a difference, as will adjusting for mulch.

Watering deeply, and infrequently, is usually the best approach to deliver that water.

It's best to water plants in the very early morning too (if overhead watering), it allows the foliage to dry out quicker as the sun comes up. This helps avoid fungal related diseases from setting in as when one waters at dusk leaving the foliage wet through the night.

Agree. I always ask folks, "Do all your kids have the same needs? Do you and your spouse have the same needs even though you live in the same house?"

Do you need the same amount of water when it is 95 degrees outside and you have been mowing.as when it is only 70 degrees?

You can't have a rule or a set schedule because there are too many variables. Each type of plant has very different water needs. Each soil, each climate, each plant size, etc. are all different. For example, if your cuke and rosemary are in the same bed close to each other then the amount of water the cuke needs can easily kill the rosemary. Same goes for squash and tomatoes.

Dave