I have found a lot of books, but I haven't found that one yet.

I want to find a particular illustrated children's picture book where a boy is looking out the window and sees the changes of the seasons.

Oh this is still not it, but it's a good find because I also read it as a little kid so that's cool. I don't know why I can't find the one that I'm looking for though. 

"Vintage 1982 First Little Golden Book - My Book Of The Seasons" | eBay

https://www.ebay.com/itm/187970822615?chn=ps&mkevt=1&mkcid=28&google_free_listing_action=view_item&srsltid=AfmBOorSdpy7DyKKdjsnGMQJRmX58Vhv0MmBMy9AU6zVvZtBYn72jC89OqI

Oh, look at all of these. 

None of them are the one I was looking for, but I really like the look of "The Colors Out My Window" by Gabrielle Story illustrated by Maria Mola.