Detroit, Cleveland, Boston, Madrid, Rome, Istanbul and Beijing are all fairly close to Chicago's latitude. Even New York, Salt Lake City, Toronto, Athens, Seoul and Tokyo aren't terribly far from being in line with Chicago. Most of the international cities have a more moderate climate than Chicago due to their proximity to oceans, with the exception of Beijing, which has a similar, but slightly warmer, climate when compared to Chicago.
There are no major cities in a similar longitude as Chicago.
Mexico City's latitude is 19.43º N (i.e. almost the same latitude of Hawaii)
lower average temperatures
Springfield Missouri has almost the same latitude. The difference is like 5'
Denver, Colorado, is located at approximately 39.7392° N latitude. Cities that share a similar latitude include Kansas City, Missouri; St. Louis, Missouri; and Omaha, Nebraska. Additionally, parts of cities like Salt Lake City, Utah, and Albuquerque, New Mexico, are also near this latitude.
Denver would be expected to have cooler temperatures compared to Kansas City due to its higher altitude. This is because the higher altitude leads to lower atmospheric pressure and thinner air, which results in cooler temperatures.
Madrid is at almost exactly the same latitude as Pittsburgh, PA.
The city of Edinburgh in Scotland shares the same latitude as Copenhagen, which is approximately 55 degrees North latitude.
There's a HUGE number of cities that aren't at the same latitude
Heraklion, Greece is approximately on the same latitude as Hilo, Hawaii.
Wichita, Kansas is located at the same latitude as Indianapolis, Indiana.
Wellington NZ is on approximately the same latitude.
Chicago and denver