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The annual precipitation in Spokane is about 20 inches. It gets quite a bit of snow in the winter with some rain during the rest of the year, but it generally has fairly sunny weather year round, especially compared to the western part of Washington State. Here is a link to the weather averages: http://www.weather.com/weather/wxclimatology/month...

You could always wait until you move to Spokane. I live in Spokane right now (have been living here for the past year) and it hasn't rained or snowed in quite a while really. That kind of weather doesn't really come around until at least September. People around here shop at Costco, Cabelas, and other sporting goods stores for those kind of boots. Good luck.