Las Vegas is a desert climate

I'm still in Las Vegas. It's very big and there are a lot of lights at night. There are about 50 big hotels. At night it's cold but in the day time when the sun is shining it's not bad. We have some great pictures of Las Vegas but we have to wait until we get home to post them on my BLOG. At night my lips and eyes feel very dry. My dad says that's because this is a desert climate and there's very little moisture in the air.