The dews arrived on July 4,1988 - daughter and I were visiting the wildlife park in Gray, and the cool morn turned into a sweaty afternoon. The humidity got worse and worse, peaking for the 1st 2 weeks of August; PWM TD reached 77° in early August, their highest on record - probably still stands. Then fall-like air finished the month, 1-15 averaged 73° and 7° AN, 16-31 had 60, 3° BN.
Summer 1989 was closer to the average.