You could try skiing in Canada. I'd recommend you to come to Toronto but probably not in winter.
Banff is beautiful year round, but especially cool in winter for the sightseeing and skiing. I imagine it would be a nice change if you're bored of hot weather.
I did a quick check on http://www.flylink.com for pricing from san diego, and right now the flights are around 700 USD but they always drop after Christmas holidays.