Abstract: By using the monthly mean temperatures at 88 meteorological stations of Guangxi Province during the period of 1960-2005, the frequencies of abnormal high and low monthly temperatures have been computed, and the spatial and temporal characteristics of the abnormal high and low temperatures and their changes analyzed. The results show that the frequency of abnormal high temperature has a prominent stage characteristic, and it occurs frequently in Guangxi in recent 10 years. The frequency of abnormal low temperature has a liner decreasing trend, and it has occurred less frequently in Guangxi since 1989. Studying the laws of abnormal monthly temperature is beneficial to improve the skill of short-term climate prediction.

Key words: monthly mean temperature, abnormal monthly temperature, spatial and temporal variations