The hat is back...

 

... and a new head too. A tiny head... but a head nonetheless: 

Yesterday, the head and hat were gone. Two days ago, the full-sized head was there, with the hat, and the overall effect was much more sprightly and exuberant, with the cane flung upward as if dancing like Fred Astaire. Today, with the warmer weather, the snow is sagging, and the snowman, bent over, seems to be using the cane like an old man who needs a cane.