I find it normal for the game, and irritating.
It doesn't snow in winter where I live, and I set up one of my 'hoods to reflect that, with spring-double summer-autumn. The pond will freeze over on the first day of spring in this neighbourhood and stay frozen for a few days, which is silly. Ponds never freeze here.
Odd. They never froze in Queen's Cove. But that was Summer-Summer-Fall-Spring.