The comparison between average temperatures for 1961 - 1990 and for previous three decades has shown that this period has appeared warmer, especially in northern part of the territory, where the air temperature has increased by 0.6^oC in average. In the western part of Turkmenistan warmer spell amounted 0.3^oC, in foothills and eastern part - 0.2^oC. In Mary velayat air temperature increase made up 0.4^oC. The analysis of the air temperature data, averaged for Turkmenistan for 65-year period has been made. A tendency of a small increase of average seasonal and annual air temperatures was observed over a period of 65 years (1931-1995). [Diagram]

The quantity of days with temperature higher and equal to 40^oC for a warm period has increased since 1983. It should also be pointed out that from 1931 to 1974, there was only 1 year when temperature exceeding 40^oC were observed for more than 15 days in a row. Between 1975 to 1997 this happened in 9 years, and in succession from 1995 to 1997.