During the live press conference by council member Jamm , the weather is, apparently, sunny. Knope and her coworkers, watching Jamm's press conference from inside the same building are shown with heavy rain in the background.
From 16:27 to 17:45 when Ron (Nick Offerman) is throwing darts and Ben (Adam Scott) walks in, there is at least three times when the lips of both actors don't match with the sound.