1970: On October 7th through the 9th, 1970 a record breaking early season snow storm hit parts of southern South Dakota. Snowfall of 5 to 9 inches was common across the southwest and south central on the 7th. Late on October 8th and into the 9th of 1970 the southeast portion of the state was hit. Vermillion received 6 inches of snow on the 9th and that is the largest amount ever recorded there for so early in the season. The 5 inches that fell in Sioux Falls is the earliest significant snow on record for the area. The heavy snows also affected portions of western Iowa and western Minnesota. Amounts of up to 7 inches were recorded in northwest Iowa. The heavy, wet snow snapped many tree branches and downed power lines. Sioux city recorded their heaviest snow for so early in the season. The snow was very wet and heavy, but melted quickly over the next several days.

1844: A major hurricane swept over Jamaica, Cuba, and the Bahamas. 158 vessels were wrecked and 2546 houses were destroyed along the Cuban coast.

2007: A record temperature of 87F during the Chicago Marathon led officials to cancel the race to protect the participants. There was still one fatality.