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,
Matt Groening characters after members of his own family: his parents, Homer and Margaret (Marge or Marjorie in full), and his younger sisters, Lisa and Margaret (Maggie). Claiming that it was a bit too obvious to name a character after himself, he chose the name "Bart," an anagram of brat. However, he stresses that aside from some of the sibling rivalry, his family is nothing like the Simpsons. Groening also has an older brother and sister, Mark and Patty, and in a 1995 interview Groening divulged that Mark "is the actual inspiration for Bart." Maggie Groening has co-written a few "Simpsons" books