The article presents the study results of the monthly variability thunderstorm activity at three meteorological stations located in Iraq over a ten-year period from 2000 to 2009. This is a study based on archived data from daily meteorological observations. The study of fronts for six months a year and for ten years showed that thunderstorms most often occur in March and April, accounting for about 47.42% of all thunderstorms. Moreover, 22.3% of them are in the northern mountainous region of Iraq.