What's the difference between cloudy days and cloudy days?

The state of the sky, the intensity of sunlight, and the formation of rainfall.

1. Sky condition: In meteorology, cloudy means that the amount of clouds in the sky accounts for four to eight tenths of the sky, and cloudy means that there are many clouds and no blue sky.

2, the strength of the sun: there is the sun on cloudy days, and the sunshine is not enough, but you can still see sunny days from the clouds. On cloudy days, little or no sunlight passes through the clouds.

3, the formation of rainfall: cloudy weather, there are clouds in the sky but it doesn't rain, the sky is full of cumulus clouds. Cloudy days can form precipitation, and there are cumulonimbus clouds or stratocumulus clouds in the sky.