I'm talking in general walking to and from school.
If it's too cold then that's the schools fault for even having school.
They cancel school in my area if the weather is too dangerous for kids to walk or too dangerous for kids wait at bus stops.
The first time I ever remember hearing about negative temperatures I was in 5th grade. They cancelled school and told people to stay home.
I called my boy at like 9 in the morning and was like "let's meet at the school and we will go to your house" it just seemed cold and windy

I was layered up so I wasn't bothered.
Then when I got to the school the wind blew crazily and we were messing around like we were Arctic explorers or something and I turned to face the wind as it was blowing and it made my eyes water and when I closed my eyes, the tears froze and stuck together on my eye lashes and I had to pull off the little pieces of ice. Man we laughed for like 2 hours.
Anyway this girls parents need her their ass whooped.