We were in Man on September 20-23 and found the weather colder than we had expected. The natives said it usually is warmer this time of year. Be sure to be prepared for rain and wind. We wished we had brought more warm clothes, but managed by wearing layers. Perhaps it is better now that the hurricanes have let up....anyway that was one explanation we heard.
The Isle of Man is a beautiful place. We did manage to pick up more info on the Kissacks and Radcliffes and see a bit of the island, too.