What's the weather like on three horizontal lines below the moon?

The three horizontal lines below the moon represent frosty weather.

When the temperature drops to a certain extent, the water vapor in the air will condense into solid ice crystals and form frost. Frost refers to the weather phenomenon formed in clear and windless nights with good visibility. In the early morning of autumn and winter, you can often see small white spots on the ground, which is the appearance of frost flowers. Judging the terrain and the place where the airflow rises or falls, there are frost phenomena. The appearance of frost means lower temperature and dry weather conditions.