Question submitted by Mike
I get a lot of these type of questions. As you noted for example, on October 25th Hamilton, Ontario's record low was -2.8 degrees C set in 1962 and it's record high was 25.0 degrees C set just one year later in 1963. Unfortunately there is no tie between these kind of record events. I wish there was! It's purely part of the nature of a chaotic fluid (i.e. the atmosphere) moving through the course of space and time.
After thought: I just have to add an extra note here, because today Claresholm, AB saw something even more unusual than records set merely one year apart.. a record low and high temperature set all in one day! Yes, they started this morning at -10.1 deg C, which tied a record low set in 2004, meanwhile warm winds helped crank the temperature in the afternoon to a very pleasant 23.1 deg C breaking their old previous record of 22.2 deg C set back in 1953!