@ Global Aviator...
Seasons or climate have changed up there since we first went in in 1994. Then it was May to end September.
Now, it is July to mid-October. August is now stated to be the driest month. The local people do say there has been a shift in the weather. We went last June and we did get a large amount of rain, the first night was a welcoming downpour and an electrical storm which lit up the insides of the tent (and me !) for a good three hours, relieved when it was over.
David