A Blessing for rain in Shmoneh Esrei
The shmoneh esrei, also known as the Amidah, is recited three times daily. In one of the blessings we ask Hashem to bless the year along with the produce of the land. Because the blessing refers to things growing from the ground we change the blessing slightly from winter season to summer season to reflect what the ground needs.
In Israel starting on the seventh day of the month of Cheshvan (this year Nov 2011) they begin to say ‘V’sein Tal Umatar’ (asking for rain). However we only begin to say this insertion outside of Israel on December 4th or 5th.
Say one is in Israel now but plans on flying outside of Israel. What should he or she say?
There are two main opinions. 1) Say it like wherever you are according to the custom of the place. 2) If you are planning to return to Israel within the year, continue saying like they do in Israel even if you have left the country.
It is best to ask your local Rabbi to find out what you should do in this situation.