September 1
1962: Typhoon Wanda struck Hong Kong, killing 434 people.
September 2
1935: The Labor Day Hurricane, the strongest hurricane ever to strike the United States, passed over the Florida Keys, killing as many as 600 people.
September 3
1969: Hurricane Francelia made landfall near Punta Gorda, Belize (then British Honduras). Severe flooding and landslides over the next several days would killed 271 people in Guatemala and El Salvador.
September 4
1933: The strongest hurricane to strike the United States during the hyperactive 1933 Atlantic hurricane season made landfall near Jupiter, Florida.
September 5
1978: Hurricane Norman made landfall in southern California as a weak tropical depression, one of only a few tropical cyclones on record to do so. The storm's remnants would produce a rare late-summer snowfall in the Sierra Nevada mountains that killed 4 hikers.
September 6
2017: Hurricane Irma made landfall in the Virgin Islands at peak intensity, with sustained winds of up to 180 miles per hour (290 km/h), killing several people and causing catastrophic damage.
September 7
1953: Hurricane Carol made landfall near Saint John, New Brunswick, with reported wind gusts as high as 80 miles per hour (130 km/h).
September 8
1900: The Galveston Hurricane, the deadliest hurricane of the 20th century, made landfall at Galveston, Texas.
September 9
1980: MV Derbyshire, the largest ship ever to sink, was lost south of Japan during Typhoon Orchid, killing all 44 aboard.
September 10
1994: Hurricane John became extratropical, ending its 31-day existence as a tropical cyclone, the longest in history.
September 11
2008: Hurricane Ike made landfall near Galveston, Texas, causing more than $30 billion (USD) in damage. Ike was the third-costliest tropical cyclone in history at the time, and killed at least 214 people throughout the Caribbean.
September 12
1982: Typhoon Judy made landfall on southern Honshu, Japan, killing 26 people and flooding more than 60,000 homes.
September 13
1944: The Somers-class destroyer USS Warrington was sunk by a storm dubbed The Great Atlantic Hurricane off the coast of The Bahamas. Of the 321 officers and crew aboard, only 73 were rescued.
September 14
1996: An unusual hybrid sub-tropical cyclone formed over Lake Superior.
September 15
1993: Hurricane Gert (at the time only a weak tropical storm) made landfall in northern Nicaragua. The storm would slowly move across Honduras, Belize, and Mexico over the next several days, dumping rain that led to widespread flooding that killed more than 100 people across Central America.
September 16
1984: Tropical Storm Fran passed just south of the Cape Verde islands, causing severe flooding that killed at least 29 people.
September 17
1986: The NOAA-10 weather satellite was launched into a polar orbit.
September 18
1906: A typhoon devastated the city and port of Hong Kong, killing 15,000 people: around 5% of the population at the time.
September 19
2012: Hurricane Nadine, one of the longest-lived tropical cyclones on record in the Atlantic Ocean, passed about 150 miles (240 km) south-southwest of Flores Island, Azores. Despite maintaining tropical storm strength or greater for 21 days, this was the storm's closest approach to land, and no damage or injuries were reported.
September 20
1978: Hurricane Greta, after having weakened to a tropical depression due to its passage over Central America, restrengthened to a tropical storm in the far eastern Pacific Ocean. Because naming conventions for tropical cyclones in the Pacific are different from the Atlantic Ocean, the storm was renamed "Olivia", becoming a rare two-name storm.
September 21
2000: The NOAA-16 weather satellite was launched into a polar orbit from Vandenberg Air Force Base, California.
September 22
1984: Hurricane Odile made landfall near Zihuatanejo, Guerrero, Mexico. Up to 24.73 inches (628 mm) of rainfall caused severe flooding, especially around the Atoyac River where 21 people drowned.
September 23
1551: (possibly 1556): The deadliest tornado in European history hit the Grand Harbour of Malta, sinking at least 4 naval ships and killing at least 600 people.
September 24
2001: Just two weeks after the September 11 attacks, several tornadoes hit the Washington, D.C. metro area, including one which passed a few hundred feet from The Pentagon and skipped across Capitol Hill.
September 25
1933: A major hurricane made landfall on the Yucatán Peninsula near Tampico, Tamaulipas, Mexico, killing more than 180 people
September 26
1881: The first and deadliest recorded tornado in Japanese history killed 16 people in Miyazaki, Miyazaki Prefecture.
September 27
1991: Typhoon Mireille struck southern Japan, causing several billion dollars in damage.
September 28
1917: A major hurricane made landfall near Fort Walton Beach, Florida, with maximum sustained winds of 115 miles per hour (185 km/h)). This was the strongest hurricane to impact the Florida Panhandle until Hurricane Opal almost 80 years later.
September 29
1915: A major hurricane struck New Orleans area, killing at least 275 people in the city and surrounding area.
September 30
2012: Hurricane Nadine, the fourth-longest-lived tropical cyclone on record in the Atlantic Ocean, reached peak intensity west of the Azores.