What does each weather symbol in the weather forecast mean?

Sunny day: it means that there are no clouds or scattered clouds in the sky, but the cloud amount is less than110, which is called sunny day. Sometimes there are very high and thin clouds in the sky, but this has little effect on sunlight. Cloudy: it can be cloudy when the cloud amount of low clouds in the sky accounts for 4/ 10 ~ 7/ 10 or the cloud amount of high clouds accounts for 6/ 10 or more of the sky area. Cloudy day: it is called cloudy day when the middle and low cloud cover accounts for 8/ 10 or more of the sky area. Cloudy days are dark days, and little or no sunlight can penetrate the clouds. Fog: refers to a large number of water droplets or ice crystal particles suspended in the air near the ground. When this aggregate reduces the horizontal visual distance below 1000 meters, it is called fog; When the visible distance drops to 1000 ~ 10000 meters, it is called light fog.

Light rain: when the rainfall in 4 hours is less than 10.0mm or 1 hour is less than 2.5mm, it is called light rain ... moderate rain: when the rainfall in 24 hours is 1 0.0 ~ 24.9mm or1hour is between 2.5 ~ 8.0mm, it is called moderate rain. Heavy rain: when the rainfall is less than 25 in 24 hours. 0 ~ 49。 9 mm or 1 hour rainfall reached 8. 1 ~ 15。 9 mm is called heavy rain. Rainstorm: Rainstorm occurs when the rainfall reaches100.0 ~199.9mm; When the rainfall reaches 200 mm, it is called rainstorm; Thundershower: refers to sudden rainfall accompanied by lightning, which is characterized by short rainfall time, sudden start and end, and great changes in precipitation intensity. Intermittent precipitation with lightning and thunder.

Hail: It is a kind of solid precipitation. Refers to spherical or conical ice cubes with a diameter of 5.0 mm, which will rain heavily in the clouds. The shape is also irregular. The monomer is called a hail block and consists of transparent and opaque layers. The diameter of large hailstones can reach 19 cm. Freezing rain: raindrops freeze on the ground below 0℃, also known as rain storms (frozen by fog drops, called fog storms), and often fall off power lines, freezing the road surface and affecting communication, power supply and traffic. Sleet: refers to the precipitation phenomenon that raindrops and wet snow land at the same time. When it happens, the temperature near the ground is slightly higher than 0℃. When snow falls into this layer of air, part of it will melt into water droplets.