Is it cold for a long time in leap February?

It won't be cold for long in leap February. The leap month is because the lunar calendar was established to coordinate the contradiction between the tropic year and the lunar year. This is a unique calendar setting in China. The lunar calendar and the tropic year conflict with the 24 solar terms, and something needs to be adjusted, so the leap month was born.

Leaping February is the second February of the lunar calendar. It's usually March at this time, and the weather has begun to get warmer. The weather in many places is not very cold. So a leap in February doesn't mean it will be cold for a long time.