What I see or I hear

In the morning I walked for a while with my dog. And when I got to the cherry tree path along a river,I could hear cicadas making their high-pitched singing. I walked there yesterday also, but I didn't notice such a thing. The air was not humid today's morning, and I could find out that the rainy season was over here. I am not sure whether there had been an official announcement of it, or the end of rainy season, from the Meteorological Agency, cicadas living in the wild told us of it.