When is the first frost on 20 19? Is it winter after the first frost?

The first frost is one of the traditional twenty-four solar terms and the eighteenth solar term, which is located after the cold dew solar term and before beginning of winter. After the first frost solar terms, the weather will get colder and colder. So it's winter after the first frost?

20 19 when was the first frost? 20 19, the first frost is on September 26th of the lunar calendar and on October 24th of the solar calendar. The first frost officially arrived at 0 1: 18:53.

The first frost is the18th solar term among the 24 solar terms, the last solar term in autumn, and the transition from autumn to winter. At this time, the ground heat dissipation in the Yellow River basin is large in autumn, and it will suddenly drop below 0℃ on sunny nights. Water vapor condenses on the ground or plants to form fine ice needles or hexagonal frost flowers, and the first frost appears, so there is a saying that "thick frost is fierce to the sun."

Today's almanac is appropriate.

Marry, build a house, break ground, travel, move workers, break ground, drill graves, bury, pick up the market, collect money, offer sacrifices to households, seek wealth, enter school, make clothes, set up vouchers, plant wealth and seek medical treatment.

Today's old almanac is taboo.

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Is it winter after the first frost? The first frost solar term belongs to autumn and is the last solar term in autumn. "Li, also." In ancient China, people regarded beginning of winter solar terms as beginning of winter. According to climatology, after the second half of the year, the average temperature is below 10 degrees Celsius, which is winter. China has a vast territory, and different regions have different winter time. For example, Mohe, the northernmost part of China, has the earliest winter, usually in early September. It will take some time for the Yangtze River basin to really enter winter.

In the first first frost solar term, cold air activities are more frequent, and the weather will get colder gradually. China's first frost line will also slowly advance from north to south. According to climate statistics, the first frost has appeared from Shandong Peninsula to north-central Henan, central Shaanxi to northwest Yunnan in early October, but it will be later in the south.

Where did the frost in The First Frost come from? First frost is not just the first frost in the solar terms.

Frost actually comes from the water vapor near the ground, which is formed by condensation after the water vapor in the air is saturated. Similar to the frosting principle, dewing is actually a phenomenon of water vapor saturation and precipitation on near-ground objects. It's just that when dew forms, the temperature is higher, and the water vapor condenses, while when frost forms, the temperature of the ground or objects is lower. When the temperature drops to 0℃, water vapor condenses to form white ice crystals, which is frost.

Therefore, in order to form frost, firstly, the temperature of the surface or near-surface objects is required to be low enough; Second, it is required that the water vapor in the air is sufficient and can reach saturation after radiation cooling at night.