秋季是南北季风交替的过渡时期,温暖空气势力逐渐减弱,向南撤退,北方冷空气势力则逐渐加强,不断南下。我区北部比南部来得早、强度大;山区比平原来得早而较强。各地每年第一次出现寒露风的时闻:北部地区最早在9月下旬,一般在10月上旬到中旬初,个别年份推迟到10月中旬。中部地区最早在10月初,一般在10月中旬,最迟在10月下旬。南部和沿海地区,一般是10月中旬,强度较弱,持续时间较短。高寒山区在9月中旬到10月上旬,强度较大。这是晚稻生长后期的一种严重灾害性天气。在广西,寒露风有三种类型:(1)冷湿型。在北方冷空气影响下,往往出现低温阴雨天气。当日平均 Autumn is the transitional period of alternating northern and southern monsoons. The warm air force gradually weakened and retreated to the south. The cold air forces in the north gradually strengthened and continued to go south. The northern part of the district came earlier and stronger than the southern part; the mountains came earlier and stronger than the plain. The first time every year when the dew winds smell the news: the earliest northern region in late September, usually in early October to early mid-early, individual years postponed to mid-October. The earliest in central China in early October, usually in mid-October, late in late October. Southern and coastal areas, usually mid-October, are weak and have short durations. Alpine mountains in mid-September to early October, greater intensity. This is a late severe late-season catastrophic weather. In Guangxi, there are three types of cold dew: (1) cold and wet type. Under the influence of the cold air in the north, cold and rainy weather often occurs. Same day