Speaking of summer, I hear about ghost stuff more often.
For example, horror programs on TV or at some places a haunted house is built only during summer time.
The reason is that horror stuffs make you frighten and cool you down in hot summer.
I don't know if this is only Japanese culture but needless to say Japanese horror movie is quite popular all over the world.
There is one famous haunted house in Kyoto Studio Park Toei. If you are interested, why don't you go there to cool down?? I mean if you do like horror movie...