Convective systems are micro or meso-scale atmospheric phenomena determined by atmospheric stability indices. The climatological study of these indices can be important in predicting convective systems. In this study, using JRA55 data with a horizontal resolution of1.25 × 1.25 degree during the period 1958 to 2018, the atmospheric stability indices including Convective Available Potential Energy (CAPE), K Index ( KI), Lifted Index (LI) and Total Totals Index (TTI) were calculated for a large area encompassing the west of Asia. The results showed that the seasonal distribution of convective indices in the west of Asia is affected by the seasonal cycles of temperature and humidity associated with the ITCZ displacement. On the other hand, it was observed that the distribution pattern of the stability indices is much closer to the temperature pattern than the moisture pattern. The results also showed that the maximum values of the stability indices occur in summer over lowland and coastal areas and the minimum ones in winter and highlands.