Freebase(0.00 / 0 votes)Rate this definition: Romance languages. The Romance languages are all the related languages derived from Vulgar Latin and forming a subgroup of the Italic languages within the Indo-European language family. The Romance languages developed from Latin in the sixth to ninth centuries.
In most years, Chicago averages a daily maximum temperature for September that's between 72 and 78 degrees Fahrenheit (22 to 25 degrees Celsius). The minimum temperature usually falls between 52 and 57 Â°F (11 to 14 Â°C).
It would be advisable to carry with you a warmer jacket or jumper, though, as the evenings especially can get quite cool. The average daily temperature for Chicago in September is still warm at 24 C, but this can still drop down to 12 C on average.