Weird Weather

This Colorado weather never ceases to perplex me.  Today, it started out with a morning high of about 80 degrees, by noon some light cloud cover had come in, and now, at 330, it is raining out.  I've always thought of summer rainstorms as characteristic of humid weather, like in the South in the summertime.  I guess I should never underestimate the power of climate variety in such an ever-changing environment.