How Cold is it Outside?
The higher we go the colder it gets
As a rough guide, for every 1000ft we go higher the air temperature decreases by approximately 2 degrees Celcius, because of the reduced air pressure as we get higher.
That is why, as you go up into the mountains, the air temperature gets less. If you go high enough into the mountains it may become cold enough for snow to stay on the ground.
That’s why ski resorts are in the mountains and not at the beach.