In your climate, squash and tomatoes will likely need water every day when in a pot. (If it is warm, the orange from the last post might be every 3-4 days depending on soil.)
But it looks like your vegetables probably have warm roots. During the day, stick your hand down into the soil in the pots. If it feels warm you will need to insulate the pots somehow. Painting the pots white will help a little. Insulate the pots with bubble wrap, or put it in a bigger pot with leaves or straw between the pots, a bottomless cardboard box full of leaves....