Colder

It is getting colder and colder day by day.

On colder days, they curl up or dig a hole in the snow.

By and by it will become colder again.

It has become noticeably colder.

It's getting colder and colder.

As you climb higher, the air becomes colder.

The higher we climb, the colder it becomes.

The higher we climb, the colder it gets.

The higher you climb, the colder it becomes.

It is still colder today.