Ouija Boards are too spooky and shouldn't be allowed in the house. (This is serious, I have a phobia of them)
So here's the question. Are you afraid of the Ouija Board itself? Or are you afraid of evil spirits?
As far as the physical item, your average Ouija Board is made by Hasbro and sold at Walmart, just like My Little Ponies, Transformers, and
this cute lil tiger. As long as it's in the box, it's no more an occult danger than that tiger is a real tiger. (If it were, the board game section of Wal-mart, that keeps a stack of the things year-round, would be REALLY dangerous).
As far as actually USING the ouija board in the house, there are some different schools of thought on that, but the neat thing is that there are numerous tutorials on how to use one safely (some people do, in fact, say you shouldn't use them in the home at all. However, everyone I've ever personally known who uses them felt that the home was perfectly fine as long as it's been blessed and purified). For the purposes of this discussion, I found a pretty handy article specifically on
places to play/not play Ouija.
I'd suggest reading up on the subject. Knowing how to protect yourself against something frightening can help to make it a little less scary. (Even if you don't believe in spirits, it can still help you feel better).
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Hot weather is better than cold weather. Cold makes your fingers ache and your nose run. You can't even go for a walk without blowing your nose fifty times. Heat just makes you sweaty, which can be annoying, but it's not painful and doesn't involve snot, and is therefore the far better option.