According to the National Weather Service, July 27 was a record low maximum temperature for this region:
The high temperature reached just 64 degrees…falling well below the record low maximum for the date of 70…set way back on July 27th 1874. Adding insult to injury…the high of 64 degrees occurred just after midnight! Temperatures hovered in the mid 50s to around 60 during the afternoon hours of the 27th as a steady rain fell. It was also the coolest July 27th on record since 1870… overall…with an average temperature for the day of 61 degrees. While no official records can be quoted…it is pretty safe to say that it is unusual in July to have cooler afternoon temperatures than at midnight.
Like I said: My kind of summer.