Yeah...to get those all time record high mins you usually need clouds and prefrontal wind to keep the air mixed. That 7/5/90 overnight had a front go through before sunrise and by the following 5z it was down to 67F. Mid 80s almost all night with dews is rough though.
BDL,1990-07-04 21:00,KBDL 042100Z 23012G20KT 10SM CLR 34/21 A2964 RMK SLP036 T03440211 57025
BDL,1990-07-04 22:00,KBDL 042200Z 25011KT 10SM CLR 34/21 A2963 RMK FEW CI N SLP033 T03390211
BDL,1990-07-04 23:00,KBDL 042300Z 19011KT 10SM CLR 33/22 A2964 RMK FEW CI N SLP036 T03280217
BDL,1990-07-05 00:00,KBDL 050000Z 19008KT 10SM SCT250 32/22 A2966 RMK SLP041 8/001 T03170217 53005
BDL,1990-07-05 01:00,KBDL 050100Z 19011KT 10SM SCT150 SCT250 31/22 A2965 RMK HAZY SLP039 T03060217
BDL,1990-07-05 02:00,KBDL 050200Z 20010KT 7SM SCT150 31/22 A2966 RMK SLP043 T03060217
BDL,1990-07-05 03:00,KBDL 050300Z 25009KT 6SM DZ SCT150 BKN250 31/22 A2966 RMK SLP043 8/071 T03060217 52002
BDL,1990-07-05 04:00,KBDL 050400Z 25009KT 6SM DZ FEW250 29/22 A2964 RMK SLP034 T02940217
BDL,1990-07-05 05:00,KBDL 050500Z 21008KT 6SM DZ FEW250 29/22 A2963 RMK SLP031 T02940217
BDL,1990-07-05 06:00,KBDL 050600Z 20008KT 6SM DZ BKN250 29/21 A2963 RMK SLP032 8/001 T02890211 57010
BDL,1990-07-05 07:00,KBDL 050700Z 17005KT 6SM DZ BKN250 27/21 A2962 RMK SLP029 T02720211
BDL,1990-07-05 08:00,KBDL 050800Z 29013KT 6SM DZ BKN250 30/20 A2965 RMK WND 26V32/ SLP037 T03000200 59086
BDL,1990-07-05 09:00,KBDL 050900Z 30012KT 10SM BKN150 OVC250 29/19 A2964 RMK SLP036 8/071 T02940189 53003
BDL,1990-07-05 10:00,KBDL 051000Z 30011KT 15SM BKN150 OVC250 29/19 A2964 RMK SLP034 T02890189
BDL,1990-07-05 11:00,KBDL 051100Z 30015KT 15SM SCT150 OVC250 29/16 A2968 RMK SLP048 T02890161
BDL,1990-07-05 12:00,KBDL 051200Z 29010KT 20SM SCT140 BKN250 28/16 A2969 RMK SLP053 8/071 T02780161 53017
BDL,1990-07-05 13:00,KBDL 051300Z 26011KT 20SM BKN140 BKN250 28/17 A2970 RMK SLP056 T02830167