A final global warming counterexample for the night. This busts records set in 1940, 1933, 1926, even as far back as 1920.
“Another bone chilling mid-winter-like night and morning” for Southern and Northeastern Ontario, says Environment Canada.
Record low temperatures for 11 November 2017.
Windsor Airport -6.3 C (20.7 F)
Old Record of -5.0 C (23.0 F) set in 1940Sarnia -12.3 (9.9 F)
Old Record of -8.3 C (17.1 F) set in 1926Kitchener -13.7 C (7.3 F)
Old Record of -9.4 C (15.1 F) set in 1926Elora -14.6 (5.7 F)
Old Record of -10.6 (12.9 F) set in 1920Wiarton -9.4 C (15.1 F)
Tied the record of -9.4 set in 1976Hamilton -9.7 C (14.5 F)
Old Record of -8.3 C (17.1 F) set in 1926Vineland -7.5 C (18.5 F)
Old Record of -5.6 C (21.9 F) set in 1926Buttonville Airport -10.1 C (13.8 F)
Old Record of -7.8 C (18.0 F) set in 1987Oshawa -10.4 C (13.3 F)
Old Record of -7.2 C (19.0 F) set in 1976Cobourg -8.4 C (16.9 F)
Old Record of -7.2 C (19.0 F) set in 1976Peterborough -13.6 C (7.5 F)
Old Record of -13.3 C (8.1 F) set in 2004Trenton -11.3 C (11.7 F)
Old Record of -9.4 C (15.1 F) set in 1976Kingston Airport -10.2 C (13.6 F)
Old Record of -8.3 C (17.1 F) set in 1976Ottawa Airport -11.8 C (10.8 F)
Old Record of -10.6 C (12.9 F) set in 1976Barrie -15.3 C (4.5 F)
Old Record of -12.8 C (9.0 F) set in 1957Algonquin Park -16.6 C (2.1 F)
Old Record of -15.6 C (3.9 F) set in 1933North Bay -14.5 C (5.9 F)
Old Record of -13.9 C (7.0 F) set in 1976Sudbury -13.3 C (8.1 F)
Old Record of -12.8 C (9.0 F) set in 1985
Source: http://weather.gc.ca/warnings/weathersummaries_e.html