(Mishna Berura Yomi – Chicago Center for Chesed)

At Maariv Wednesday night, December 4th, in chutz la’aretz, we begin to say Vesein Tal Umatar during Shemonah Esrei in the bracha of Boreich Aleinu.

If one became aware after completing the bracha of Mevareich Hashanim that one omitted Vesein Tal Umatar, one should wait to insert it right before “Ki atah shomeiah” in Shema Koleinu. If one has already completed the bracha of Shomeiah Tefillah, one may insert Vesein Tal Umatar before saying Retzei. If one has already started Retzei, one must return to the bracha of Boreich Aleinu, which is the proper place for Vesein Tal Umatar. If one already completed the Shemonah Esrei and stepped backward, one must repeat the entire Shemonah Esrei (Shulchan Aruch with Mishna Berurah 117:5. See also Bi’ur Halacha).