Why is palermo warmer than Milan?

This assumption is not true. Milan has a warmer climate compared to Palermo. Milan is located in the Po Valley in Northern Italy, while Palermo is located on the island of Sicily off the coast of Southern Italy. The climate in Milan is classified as humid subtropical, with hot summers and cold winters. The average temperature in Milan in July is 25°C, while the average temperature in January is 3°C. Palermo has a Mediterranean climate, with hot, dry summers and mild, wet winters. The average temperature in Palermo in July is 27°C, while the average temperature in January is 11°C. Milan is warmer than Palermo on average, although Palermo has warmer winters.