I enjoyed your winter Haiku (although I admit to not wishing for winter to come any time soon).
I have two suggestions:
The first is to swap L1 and L3.
The second is to find another description for the word 'between' as I think you could make the snowman vision stand out further with a substitution there that leads into 'winter begins'. Perhaps use replacements for 'jumps' and 'joy' ? Perhaps:Snowman jumps in joyfullness
Snowman jumps in joyous play
Enjoyed the read,