2005: A strong low pressure system developed over the Central Rockies and moved through the Northern Plains, bringing heavy snow to much of the northern Black Hills and far northwest South Dakota. Precipitation started as rain during the day and changed over to snow during the late afternoon and early evening, mixed with freezing rain and sleet. Heavy snow fell during the night and ended in the morning. Snowfall amounts were generally in the 6 to 12 inch range, with locally heavier amounts across northern and western Harding County. The heavy, wet snow resulted in many downed trees, large branches, and power lines. This caused numerous power outages and some minor property damage. A few locations had some of the highest daily snowfall amounts ever recorded in October. Camp Crook received 12 inches of snow, which tied for the daily record for snow in October. Redig also tied its record for most snowfall in one day for October with 9 inches. Lemmon had its second highest daily total snowfall for October (6.5 inches). Bison received 6 inches, which was tied for the 3rd highest daily total in October. Spearfish tied for the 8th highest daily snow total for October with 7 inches.

1777: The Battle of Germantown was fought in a morning fog that grew more dense with the smoke of battle, causing great confusion. Americans firing at each other contributed to the casualties during the battle.

1987: Southern California experienced temperatures well over 100F in the afternoon. On the same day, 18 inches of wet, heavy snow fell from eastern New York into New England.

1995: Hurricane Opal, a Category 4 storm when it was over the open Gulf of Mexico, brought 10 to 15 inches of rain to Alabama and the Florida panhandle.

2012: Former Hurricane Nadine finally dissipated over the Azores. The system had maintained at least tropical storm strength for three weeks, tying it with 1971's Hurricane Ginger as the Atlantic Ocean's longest-lived tropical storm.