Yes, I went in summer but the thing is... with the snow you have had a beautiful and unique experience.
I used to go to the Grand Canyon a lot and of course everyone wants to gaze into it from the rim. But once I visited and it was snowing and the clouds filled the canyon so you couldn’t see into it at all. The next morning when everything cleared and the top portions were covered in snow is one of the most special moments of my time visiting.
You are very lucky to have seen Canyon de Chelly under these conditions! ☺️