September is the worst most active month for hurricanes (Image: GETTY)

Already this year there have been several hurricanes, a few of which have caused significant disruption to affected countries.

Hurricane Lane hit Hawaii last week, causing flooding and landslides on Big Island as at least 40 inches of rain fell.

In July, Hurricane Chris began close to Bermuda before moving to just off the coast of North Carolina.

The resulting rough seas saw one man drowned, and severe winds experienced in Newfoundland and Labrador.

Subtropical storm Alberto struck in May, killing 12 people in Cuba. Two of these deaths were recorded as indirectly caused by the storm.

So far this year there have been two hurricanes, five storms and five depressions with fatalities totalling 13.

However, there could be more devastation on the way as September historically is the most active month for hurricanes.

Dr Phil Klotzbach, Research Scientist at Colorado State University told why September is regarded as the most active month.

He said: “The reason why September tends to be your most active month is due to having low levels of vertical wind shear and warm sea surface temperatures during the month.

“Hurricanes live off of warm ocean water, and the Atlantic tends to be quite warm during September.

“Vertical wind shear, the change in wind direction with height, is actually a bit lower in August than in September, but on average, vertical wind shear is still pretty low in September.

“Too much vertical wind shear is detrimental for hurricanes since it tilts the hurricane and disrupts its circulation.

“The sea surface temperatures warm up quite a bit from August to September, so September is basically the intersection of low levels of vertical wind shear and warm sea surface temperatures.”

Not only does September mean more hurricanes, but stronger ones also.

Dr Klotzbach also told “Typically, hurricanes that form during September do reach slightly higher intensities than storms forming in either August or October, which are the two other months which generate considerable activity in an average year.

Tropical Storm Alberto


Graph showing the peak in season for hurricanes (Image: GETTY)

“For example, 48 percent of all hurricanes during September become major (Category 3+; 111 mph or greater) hurricanes.

“While during August it’s about 40 percent of all hurricanes that become major and in October it’s about 35 percent of all hurricanes that become major.”

Currently, there are no signs of any hurricanes in the Atlantic for September, and time will tell if September lives up to its history.