What happened to Spring??

I distinctly remember posting a few weeks ago about how warm it was and spring-like. Well, we've been officially in Spring now for 4 days and it hasn't once seemed like spring weather. The radio says its "unseasonably cool" - lows in the mid 30's and highs barely into the low 50's. It's a good thing I put the flannel sheets back on the bed when I changed it last week (and wondered if it was time to put them away til fall). We may need them for yet another week. I certainly hope it doesn't freeze again - many of the azaleas are still in bud.