Abstract: Using regression analysis and Mann-Kendall sudden-change analyses, this research identified the extreme temperature weather and precipitation events in Kunming city based on a collection of meteorological data records from 1951 and 2010 from Kunming's meteorological station. Then, we outlined safe flight operations in the extreme weather conditions, especially for days with heavy fog at the Kunming Changshui airport. Finally, we provided some solutions to improveflight safety operations at the Kunming Changshui airport by comparing with the fog characteristics at the Wujiaba airport. This research showed that:1) extreme precipitation and temperature events of Kunming Changshui airport have been increasing in recent years, 2) The frequency of fog occurrences in Changshui was much higher than in Wujiaba due to the surrounding landforms, and 3)flight safety operations need co-operation among relevant departments of the Airlines.