The question everyone asks is, how much water is enough? If only there were some kind of x-ray vision that would let us see whats going on under the soil surface. The only way to really know is to dig a hole and see whats there. You want to soak the root zone of the plants you care about, especially if they have been planted within the last two years, at least once every week or two.
If we do get rain this week, thats great, but dont assume its necessarily enough. Just because it seems like a lot of rain, once again the only way you know if enough rain fell is to dig into the soil and see just how far it went. You might be surprised to see the soil is still quite dry an inch deep after what seemed like a significant rainfall. You just dont know until you look.