Found it!
http://www.icao.int/cgi/goto_m.pl?/cgi/statesDB4.pl?en
With my very basic ATPL level of knowledge of climatology I would say weather wise he has picked a safe route. His flight will be mainly south of the ITCZ (as it is approaching its northen most point) where weather is generally more predictable because of the large amount of water in that part of the world. Apart from the ITCZ he will be in mainly high pressure regions and in slack wind or in areas of with very good facilities.