Based on the analyses of rain gust data from 1957 to 1994

the authors indicate that the rain gust can appear at any time in the whole year in Zhongshan City

with a most popular season from April to September.But that is very different from year to year. In recent years

the numbers of the day of rain gust is increased obviously and there are some rain gust days continually in Zhongshan historically

the paper pionts out there are nine different putterus of rain gust climatic situation and system can present in Zhongshan city

and the maximun and mininmun days of rain gust in the years under the different circulation pattern at the 500 hPa average pressure height field as well