How can you tell if the temperature outside was higher or lower then 0 degrees celsius without measuring it?

Question

How can you tell if the temperature outside was higher or lower then 0 degrees celsius without measuring it?

Answer 1

you cant measure tempurature.

Answer 2

put an ice cube outside and see if it melts or not.

Answer 3

If you see frozen water, then it is below zero. If you see liquid water, it is above 0

But you are measuring it, you are using the freezing point of water as a thermometer.

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Answer 4

snow below 0 easy