A sign of fog in the morning

This meteorological condition indicates sunny and rainy days.

1. In autumn and winter, the cold air in the north goes south. When the weather clears and the sun shines, the moisture content in the air will increase, which is easy to form radiation fog. When the sun came out, the radiation fog disappeared.

The fog in the morning is usually caused by the low ground temperature and the condensation of water vapor in the air when it meets cold air. In this case, usually accompanied by gloomy weather, it is difficult for sunlight to penetrate the clouds, making the sky look gloomy.