What's the difference between cloudy and cloudy days?

Cloudy: There are 40%-70% medium-low clouds or 60%- 10% high clouds in the sky. ?

Cloudy day: It is dark, covered with clouds, or slightly cloudy, but it still feels dark.

1. Meteorologically, in China, it is called cloudy when the middle and low cloud cover accounts for 4/ 10-7/ 10 of the sky area or the high cloud cover accounts for 6/ 10 of the sky area. Cloudy days refer to sky conditions in which little or no sunlight passes through clouds and dark skies.

2. The sky condition is determined by the amount of clouds in the sky and the intensity of sunshine, which can be divided into four situations: sunny, partly cloudy, cloudy and cloudy.

Sunny days: the sky is cloudless, or the medium and low clouds are less than 1%, and the high clouds are below 40%. ?

Partly cloudy: there are 1-30% medium-low clouds or 40-50% high clouds in the sky. ?

Cloudy: There are 40%-70% medium-low clouds or 60%- 10% high clouds in the sky. ?

Cloudy day: It is dark, covered with clouds, or slightly cloudy, but it still feels dark.

3. The traditional forecasting method is to forecast the weather situation first, and then forecast the weather elements. "Turn" and "arrive" are actually the reflection of the weather situation change on the weather elements. ? Generally speaking, it turns cloudy to cloudy: it shows that the weather situation will gradually deteriorate in a certain period of time in the future, and the trend is obvious. It shows that the sky is gradually lifted by clouds, the amount of clouds is reduced, and the light is transparent, as if the sunlight or visible sunlight becomes dark and covered with clouds. From cloudy to cloudy: it shows that the weather situation will gradually improve in a certain period of time in the future, and the changing trend is not particularly obvious. The sky is dominated by darkness, mostly covered by clouds, but sometimes the amount of clouds in the sky decreases and the light transmittance is better. The sky is sometimes dark and sometimes bright.

4. Cloudy sometimes is the sun, sometimes there is no sun. Looking up, you can see white clouds floating in the blue sky. Clouds on cloudy days are black and clouds on cloudy days are white. Meteorologically speaking, cloudy days can form precipitation. When there are cumulonimbus clouds or stratocumulus clouds in the sky, it is called cloudy. On cloudy days, there are clouds in the sky but it won't form rain. The sky is full of cumulus clouds.