Street Vendors, Monterrey
Try to avoid buying items from street vendors.
About the weather: its good that you remember that Montdrrey owns a very exetreme weather, which is means taht the temperature its very variable.
The coldest period are form december to march, the templed temperature (cold winds mostly) are april, september, october, november. The months with the highest temperatures are june, july, august. The raining months are: august, september and october