Springfield, Oregon of Springfield that stated, in part "Yo to Springfield, Oregon – the real Springfield." In April 2012, Groening confirmed to "Smithsonian" magazine that he named the fictional Springfield after Springfield, Oregon. He also confirmed that he intentionally left it a secret to allow people the enjoyment of assuming it was based on their own Springfield. This region experiences warm (but not hot) and dry summers, with no average monthly temperatures above . According to the Köppen Climate Classification system, Springfield has a warm-summer Mediterranean climate, abbreviated "Csb" on climate maps. Springfield, Oregon Springfield is a city in Lane County, Oregon,
Springfield, Missouri Route 166 formerly passed through Springfield, and sections of historic US 66 can still be seen in the city. US 166's eastern terminus was once in the northeast section of the city, and US 60 (westbound) originally ended in downtown Springfield. US 60 now goes through town on James River Freeway. In mid-November 2013, the city began discussing plans to upgrade sections of Schoolcraft Freeway (Highway 65) and James River Freeway (Highway 60) through the city to Interstate 44. The main reason is to minimize confusion should there be an incident on I-44 as a detour route. Springfield-Branson National Airport