In general, compared to summer, hair becomes less curly and becomes straighter.
It could be a factor in blocking cold wind and keeping you warm.
In the summer, curly hair has gaps, so air can pass through easily and sweat dries easily.
This may be the reason why northerners tend to have straight hair, while southerners tend to have curly and wavy hair.
Why not take advantage of the season and enjoy your new hairstyle.
Under 2 picturs are same person.