Yes, it's still October.
This kind of weather is pretty uncommon for Minnesota on Oct. 17. The Star Tribune says on this date in 1880, a blizzard closed roads in western Minnesota. And on Oct. 17, 1952, St. Cloud saw temps dip to 10 degrees.
A high of 70 degrees is "quite impressive," the National Weather Service in the Twin Cities says. The average high for mid-October is actually about 20-35 degrees lower than this. And a dew point approaching 70 degrees is even less common. The National Weather Service in Des Moines, Iowa, tweeted Monday morning that a dew point this warm in October is "very rare if not unprecedented."
Much of the Midwest is seeing abnormal weather for this time of year:
Severe storms possible tonight
Showers and thunderstorms are expected to develop across east-central Minnesota Monday, the National Weather Service says. These storms are expected to stick around Monday night across much of the state, with thunderstorms and maybe some severe weather possible in southeastern Minnesota.
Having severe storms in October is uncommon, but "not truly scarce," Pete Boulay, of the Minnesota Department of Natural Resources State Climatology Office told GoMN.
Severe weather happens on occasion. From 1950-2010, about 2 percent of tornadoes occurred during the month of October, Boulay says. As for thunderstorms, October usually has 1.8 thunderstorm days, while March averages about one thunderstorm day a month – so October usually sees more thunderstorms than March.