Hurricane season officially ends on November 30 each year. This applies to the Atlantic hurricane season, which typically runs from June 1 through November 30. These dates are designated because they cover the period when tropical or subtropical cyclones are most likely to form, based on decades of meteorological data. While most hurricanes occur from mid-August to late October, storms can still form later in the season, up to the official end date. Preparation for hurricane season should be completed before it starts on June 1, but the season ends definitively on November 30.