Be more specific. You mean downtown. What are your requirements on square meters, amenities, places close to, etc. An apartment of about 90 sq. And in the center of town close to duomo is about 2500 - 4k euros a month. Prices go down from there depending on area. about 8 years ago
You are looking at apporoximately 1500 Euros a month.
Here is a small sample : http://milano.attico.it/affitto/appartamenti/zona-ptagenovaromolosolaripapinianonaviglicarrobbio/?area_from=80 about 8 years ago