Take the 2-minute tour ×  In the Southern Hemisphere (Brazil,
Australia, South Africa, etc.) in October they are heading into
the summer. Do they say Mashiv HaRuach at this time of the year
or do they say it from Pesach to Succos?  share|improve this
question See also judaism.stackexchange.com/questions/11508 – 
msh210 Nov 22 '11 at 23:18 There is a collection of the various
halachic opinions here:
hebrewbooks.org/pdfpager.aspx?req=15787&pgnum=156 –  Menachem
Nov 28 '11 at 1:16  3 Answers 3  All of the discussion on this
seems to go back to Shaalos Uteshuvos Toras Chaim (by R' Chaim
Shabsi, 17th century, in response to a halachic query - the
first known one, by the way - from the Jewish community in
Brazil). He says that during the times when they need rain, if
it's not during the Northern Hemisphere winter, they should just
request it (i.e., say ותן טל ומטר, and I guess also משיב הרוח)
in the blessing שומע תפלה; otherwise they should omit it
altogether. In short, then, there might indeed never be a time
when