中华万年历

大雪是二十四节气中的第二十一个节气，也是冬季的第三个节气。每年公历12月6日、7日或8日，当太阳到达黄经255°时为大雪节气。《月令七十二候集解》说："大雪，十一月节。大者，盛也。至此而雪盛矣。"大雪节气的到来，意味着天气会越来越冷，降雪的可能性比小雪时更大，并不指降雪量一定很大。与小雪、雨水、谷雨等节气一样，大雪是直接反映降水的节气。节气大雪的到来，表示气温显著下降，降水量增多。大雪节气最常见的就是降温、下雨或下雪。大雪节气是一个气候概念，代表的是大雪节气期间的气候特征，即气温与降水量。而天气预报中的"大雪"是指降雪强度较大的雪。气象上将雨雪天气称为"降水现象"，按照降水强度的大小分为小雪、中雪、大雪、暴雪等。大雪时节，除华南和云南南部无冬区外，我国大部分地区已进入冬季，东北、西北地区平均气温已达零下10℃以下，黄河流域和华北地区气温也稳定在0℃以下。

Major Snow (Daxue) is the 21st solar term among the 24 solar terms and the third solar term of winter, occurring around December 6-8 when the sun reaches 255 degrees celestial longitude. The "Collected Explanations of the Seventy-Two Pentads" states: "Major Snow, eleventh month solar term. Major means abundant. By now snow becomes abundant." Major Snow's arrival means weather grows increasingly cold with greater snow possibilities than Minor Snow, though not necessarily indicating large snowfall volume. Like Minor Snow, Rain Water, and Grain Rain, Major Snow directly reflects precipitation. This solar term's arrival indicates significantly declining temperatures and increasing precipitation. Major Snow most commonly brings cooling, rain, or snow. Major Snow represents a climate concept indicating climatic characteristics during this period—temperature and precipitation volume. Weather forecast "major snow" refers to heavy intensity snowfall. Meteorologically, rain-snow weather is termed "precipitation phenomena," classified by intensity as light snow, moderate snow, heavy snow, and blizzard. During Major Snow, except for non-winter zones in South China and southern Yunnan, most Chinese regions have entered winter, with Northeast and Northwest averaging below minus 10°C, and Yellow River basin and North China temperatures stabilizing below 0°C.