"Temperatures vary as much as 20 degrees by neighborhood."

From the front page of the Oregonian 8/29, “Microclimates of Portland.”* Influenced by both the built and natural environments, weather conditions can vary widely based on location. That’s why monitoring meteorological parameters on-site can be critical to efficiency, operations, and safety. Weather stations from Columbia Weather Systems offer cost-effective options for local, professional weather monitoring. * https://www.oregonlive.com/expo/news/erry-2018/08/92d2d4b48a8641/hot-or-not-research-maps-hotte.html#incart_m-rpt-2