The name September comes from the old Roman word 'septem', which means seven, because in the Roman calendar it was the seventh month. The Anglo-Saxons called it Gerst monath (Barley month), because it was their time when they harvested barley to be made into their favourite drink - barley brew. They also called it Haefest monath, or Harvest month.
The Romans believed that the month of September was looked after by the god, Vulcan. As the god of the fire and forge they therefore expected September to be associated with fires, volcanic eruptions and earthquakes.
"If the first day of September is fair, it will remain so at least until the beginning of October."