Hey! Wonderful job!
The winter reptile is such a peculiar choice of character to represent winter. The serpent, as cold-blooded that they are, (I see what you did there) could adapt their temperature to compliment the weather. How awesome is that!! And because of that, your choice is one of the few outside-of-the-box kind of ideas. And I like that!
When I look at the image, I totally can feel the warm hot weather and yet I can still feel the coldness of the reptilian. Awesome composition!
Overall, well done mate. Well done.
p/s: That horn is Bae.