Okay... how big of a pot is it in? If it is underpotted, you might need to water it more. How cold is it getting down there? I was having to water up here in Sacramento, but it just rained! :o) One thing you can do is to grab hold of it and pull it out of the pot to inspect the roots, that way you KNOW if it is a root problem, under/overwatering etc. I've always thought that scheduled watering isn't so great for plants, they need more care than that.

If it's crispy, it's dead. That's a problem with an evergreen, it's hard to tell when they wilt unless they have soft tips. And if root bound, they will dry out fast.
Mine are inside right now, and covered with flowers.

Try the never-fail Finger Test Method. Poke your finger as far as it will go into the soil. If the tip of your finger feels dry, water your plant. If it's moist, wait a little longer before watering.

Rosemary will take quite a lot of water, especially when it's young and fairly small. (Mine, in the garden, gets flooded frequently in our summer torrential rain storms! It does well because it has excellent drainage.) Once it's mature, it learns to tolerate fairly dry conditions. A potted plant will always need more water than a plant in the garden.

Oldroser is right - a crispy plant is a dead plant. Take a punt on it and cut it right back to almost nothing. If you see some green inside the stems, there's hope for it. Otherwise, start again next year!

Heathen's right too - a potbound plant cannot take up nutrients and water through bent roots - like trying to drink through a bent straw. Can't be done. A mature rosemary plant is quite a large plant with a root system to match the bits you see above ground.

I am in So Cal also. I water about every other day or more if needed. Temperature is one consideration, but the recent Santa Ana winds can dry plants very quickly. Just remove the dead material and see if you can bring it back. If it dies, this is the time of year 1 ft tall plants start appearing in the dollar stores.