It is to be noted that the climate of the islands of the Pacific becomes more and more healthy the farther they are from the monsoon region.
The wet season, lasting during the prevalence of the south-west monsoon, from April to December, is clearly defined on the Pacific slope.
Tibet is affected by the south-west monsoon, just as the Pamirs are affected, but in varying degrees according to geographical position.
All the western region is but slightly affected by the monsoon.
The northwest monsoon, beginning in October and lasting till March, brings the principal rainy season in the archipelago.