warm state vs cold states...

If you live in a warm area, southern florida, arizona, etc or cold, Illinois, midwest, etc...Do you see buyers more if its warmer weather all the time or and if so, why are warmer weather states not doing so well according to the market?   I live in Missouri, so it's cold this time of year, and I hear buyers stating that they are waiting to "spring"  My question is...Does weather affect buyers or sellers????