Is it better to deliver the Khutbah of Salat-ul-Istisqa' before or after the Salah?
It is better
to offer Salat-ul-Istisqa' before the Khutbah because that was most often done by the Prophet (peace be upon him) and particularly if it will confuse the Ma'mums (people being led by an Imam in Prayer). (Part No. 7; Page No. 175) May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.