Welp, it looks like GSP has not seen a Sept low below 50 since a 49 on 9/25 in 2012! Have to go back to 2009 for the previous sub 50; a 48 on 9/29. There were 2 in 2006; 48 on 9/29, 46 on 9/30. 2 in 2003; 49 on 9/29, 45 on 9/30. There were 4 in 2001 including a 43 on 9/26. You have to go back to 1993 to find anything lower; 41 on 9/28. The first 30s (daily record) for GSP doesn't show up until 37 degrees on 9/25 1887! Not unheard of but definitely an unusually strong front for Sept, especially prior to the equinox.