What you may have guessed, Ken Dewey has confirmed.
Oct. 1-11 was the coldest Oct. 1-11 period on record for Lincoln, with records going back 123 years to 1887.
High temperatures over the weekend were usually the highs Lincoln records for early to mid-December, according to Dewey, professor of applied climate science at the University of Nebraska-Lincoln.
Saturday's high temperature at the Lincoln airport was only 38 degrees. The previous record low maximum for the date was 41, set in 1987.
Sunday's high temperature was only 40 degrees. The previous coldest maximum was 47, in 1946.
Similar record-low maximums were set across much of Nebraska. Several cities also had record minimums.
Dewey said the average temperature for the first 11 days in Lincoln was 46.7 degrees, almost a full degree colder than the 48.6 degree average temperature for Oct. 1-11, 2000.
Also in top 10:
1935: 49.3 degrees
1925, 1977: 49.6 degrees
1987: 50.3 degrees
1985: 50.4 degrees
1891: 50.7 degrees
1952: 51 degrees
1988: 51.1 degrees
1959: 51.4 degrees
The weekend cold was part of an Arctic blast that also brought snow to most of Nebraska. On Saturday, the North Platte airport record 13.8 inches of snow -- not only a daily record but more snow in one day than the city had ever received in the full month of October.
Sunday night, another weather system brought a new band of snow to the central and northern Sandhills, with average snow accumulations between 1 and 3 inches.
Temperatures are expected to improve somewhat the next couple of days, but rain is likely Tuesday afternoon and night, the weather service said.
Highs should reach the mid-40s Tuesday, around 50 Wednesday and Thursday, the upper 50s Friday and Saturday and the lower 60s on Sunday.