Music during the summertime should remind you of what summer means to you. If it makes you happy, then you should pick something with a rather fast beat, and preferably mellow. If summer reminds you of sadness, or regret, pick something darker and louder than usual. Do not be afraid to try new types of music. If you usually like pop music like Rihanna or Ciara, maybe try Rise Against's new album. Or if your into metal, maybe try reggae or hip-hop. It's all up to you.If you are not satisfied with any music available, why not make your own. If you can play an instrument, this may be a great oppertunity to try something new.