Abstract: The characteristics and variations of meteorological elements such as air temperature, water vapour pressure, relative humidity, wind speed, and wind direction in both the urban area and suburbs are studied with the observational data in Kunming, a city in low latitude and high altitude. The main results indicate that the air temperatures in the urban area are higher than that in the suburbs at most times. At night the differences are larger, and the maximum is 5.0℃ (at 03:00 hours). On the other hand, in the Kunming City, the humidity is less than that in the suburbs, and the dry island in the daytime is marked. These results would provide scientific basis for the city planning, architectural design, and prevention and control of the environmental pollution. Meantime, they could supply references for studying the urban climate in other regions.