In this study, two types of monthly convective and stratiform rainfall estimation have been derived using TRMM satellite based on rate latent heat release during 13 years (1998-2010) and high rainfall cores were identified over various regions of country aimed at cloud seeding operations usage. The most important results of this study showed that high concentration of convective rainfall are over the high elevations of Northwest, middle of Zagros and Central Alborz respectively. The pattern of stratiform and convective rainfall are similar but the amount of stratiform rainfall is far less than convective rainfall and the difference of the maximum and minimum of stratiform and convective rainfalls have been seen about 100 to 200 mm per month respectively. It seems that the rainfall estimation over Zabol region is overestimate and has not suitable estimation over southwest of Iran.