I was in a snowstorm coming into CO Springs, July 1995. I was in a snowstorm coming into CO Springs, May 2005 or so. I flew out of DIA in a snowstorm, May 2010.
About 2 years ago in April we were in central Texas south of Stephenville and the bluebonnets were blooming through the snow. I think snow is fairly rare in that part of Texas at any time of the year.