24 record low mins at the rad pit of CON in the 2000s and after quite a lull they've been picking off some in the last 5-6 years. Most recent were the 3 in a row last Sep 19-21 (28F,27F,27F) after I thought our chances of record mins in early fall had vanished.
Then there was Apr 5-6 in 2016 where CON set their all-time monthly record low (4F) and then a daily on the next day with 11F. The -21F on 2/24/2015 was a daily record and the coldest for so late in the season. They had a daily record of -17F 3 days earlier as well.
The POR goes back to 1868 too.