Cyms do best when grown outdoors because they like lots of fresh, moving air and high light (not direct sun). We have many growers who live up near San Francisco and their Cyms do well outside. They can take temperatures between 35-100F. If it is in a pot with drainage holes on the bottom and the media does not stay sopping wet, it is probably fine with what you have.
Brown spots can be fungal and are really no harm to the plant. It happens a lot to orchids with thin, long leaves. It means you need more air circulation and putting it outside with help this condition. What you have now will not go away (unless you cut it off) but it will prevent more from occurring.
When you cut a leaf, put a little cinnamon (what you have in your kitchen at home) on the cut area and it will help the leaves not to turn so brown.
Pictures of your orchid will help greatly. We can help you figure out what it is planted in and if it is indeed a Cymbidium. These plants are tough and love your climate; I'm sure you can be successful at growing it.
Here is a website with basic orchid culture for a start:
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